Deploying to gh-pages from @ open-power/skiboot@e6cda1703f6f816ee4ceef1b5389d1a8585cabff 🚀

10 files changed, 3266 insertions, 2117 deletions

diff --git a/doc/_static/basic.css b/doc/_static/basic.css
index 0807176..603f6a8 100644
--- a/doc/_static/basic.css
+++ b/doc/_static/basic.css
@@ -4,7 +4,7 @@
  *
  * Sphinx stylesheet -- basic theme.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -15,6 +15,12 @@ div.clearer {
     clear: both;
 }
 
+div.section::after {
+    display: block;
+    content: '';
+    clear: left;
+}
+
 /* -- relbar ---------------------------------------------------------------- */
 
 div.related {
@@ -124,7 +130,7 @@ ul.search li a {
     font-weight: bold;
 }
 
-ul.search li div.context {
+ul.search li p.context {
     color: #888;
     margin: 2px 0 0 30px;
     text-align: left;
@@ -231,6 +237,16 @@ a.headerlink {
     visibility: hidden;
 }
 
+a.brackets:before,
+span.brackets > a:before{
+    content: "[";
+}
+
+a.brackets:after,
+span.brackets > a:after {
+    content: "]";
+}
+
 h1:hover > a.headerlink,
 h2:hover > a.headerlink,
 h3:hover > a.headerlink,
@@ -261,19 +277,25 @@ p.rubric {
     font-weight: bold;
 }
 
-img.align-left, .figure.align-left, object.align-left {
+img.align-left, figure.align-left, .figure.align-left, object.align-left {
     clear: left;
     float: left;
     margin-right: 1em;
 }
 
-img.align-right, .figure.align-right, object.align-right {
+img.align-right, figure.align-right, .figure.align-right, object.align-right {
     clear: right;
     float: right;
     margin-left: 1em;
 }
 
-img.align-center, .figure.align-center, object.align-center {
+img.align-center, figure.align-center, .figure.align-center, object.align-center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+img.align-default, figure.align-default, .figure.align-default {
   display: block;
   margin-left: auto;
   margin-right: auto;
@@ -287,30 +309,41 @@ img.align-center, .figure.align-center, object.align-center {
     text-align: center;
 }
 
+.align-default {
+    text-align: center;
+}
+
 .align-right {
     text-align: right;
 }
 
 /* -- sidebars -------------------------------------------------------------- */
 
-div.sidebar {
+div.sidebar,
+aside.sidebar {
     margin: 0 0 0.5em 1em;
     border: 1px solid #ddb;
-    padding: 7px 7px 0 7px;
+    padding: 7px;
     background-color: #ffe;
     width: 40%;
     float: right;
+    clear: right;
+    overflow-x: auto;
 }
 
 p.sidebar-title {
     font-weight: bold;
 }
 
+div.admonition, div.topic, blockquote {
+    clear: left;
+}
+
 /* -- topics ---------------------------------------------------------------- */
 
 div.topic {
     border: 1px solid #ccc;
-    padding: 7px 7px 0 7px;
+    padding: 7px;
     margin: 10px 0 10px 0;
 }
 
@@ -332,10 +365,6 @@ div.admonition dt {
     font-weight: bold;
 }
 
-div.admonition dl {
-    margin-bottom: 0;
-}
-
 p.admonition-title {
     margin: 0px 10px 5px 0px;
     font-weight: bold;
@@ -346,9 +375,30 @@ div.body p.centered {
     margin-top: 25px;
 }
 
+/* -- content of sidebars/topics/admonitions -------------------------------- */
+
+div.sidebar > :last-child,
+aside.sidebar > :last-child,
+div.topic > :last-child,
+div.admonition > :last-child {
+    margin-bottom: 0;
+}
+
+div.sidebar::after,
+aside.sidebar::after,
+div.topic::after,
+div.admonition::after,
+blockquote::after {
+    display: block;
+    content: '';
+    clear: both;
+}
+
 /* -- tables ---------------------------------------------------------------- */
 
 table.docutils {
+    margin-top: 10px;
+    margin-bottom: 10px;
     border: 0;
     border-collapse: collapse;
 }
@@ -358,6 +408,11 @@ table.align-center {
     margin-right: auto;
 }
 
+table.align-default {
+    margin-left: auto;
+    margin-right: auto;
+}
+
 table caption span.caption-number {
     font-style: italic;
 }
@@ -391,22 +446,34 @@ table.citation td {
     border-bottom: none;
 }
 
+th > :first-child,
+td > :first-child {
+    margin-top: 0px;
+}
+
+th > :last-child,
+td > :last-child {
+    margin-bottom: 0px;
+}
+
 /* -- figures --------------------------------------------------------------- */
 
-div.figure {
+div.figure, figure {
     margin: 0.5em;
     padding: 0.5em;
 }
 
-div.figure p.caption {
+div.figure p.caption, figcaption {
     padding: 0.3em;
 }
 
-div.figure p.caption span.caption-number {
+div.figure p.caption span.caption-number,
+figcaption span.caption-number {
     font-style: italic;
 }
 
-div.figure p.caption span.caption-text {
+div.figure p.caption span.caption-text,
+figcaption span.caption-text {
 }
 
 /* -- field list styles ----------------------------------------------------- */
@@ -433,10 +500,71 @@ table.field-list td, table.field-list th {
 
 /* -- hlist styles ---------------------------------------------------------- */
 
+table.hlist {
+    margin: 1em 0;
+}
+
 table.hlist td {
     vertical-align: top;
 }
 
+/* -- object description styles --------------------------------------------- */
+
+.sig {
+	font-family: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
+}
+
+.sig-name, code.descname {
+    background-color: transparent;
+    font-weight: bold;
+}
+
+.sig-name {
+	font-size: 1.1em;
+}
+
+code.descname {
+    font-size: 1.2em;
+}
+
+.sig-prename, code.descclassname {
+    background-color: transparent;
+}
+
+.optional {
+    font-size: 1.3em;
+}
+
+.sig-paren {
+    font-size: larger;
+}
+
+.sig-param.n {
+	font-style: italic;
+}
+
+/* C++ specific styling */
+
+.sig-inline.c-texpr,
+.sig-inline.cpp-texpr {
+	font-family: unset;
+}
+
+.sig.c   .k, .sig.c   .kt,
+.sig.cpp .k, .sig.cpp .kt {
+	color: #0033B3;
+}
+
+.sig.c   .m,
+.sig.cpp .m {
+	color: #1750EB;
+}
+
+.sig.c   .s, .sig.c   .sc,
+.sig.cpp .s, .sig.cpp .sc {
+	color: #067D17;
+}
+
 
 /* -- other body styles ----------------------------------------------------- */
 
@@ -460,11 +588,78 @@ ol.upperroman {
     list-style: upper-roman;
 }
 
+:not(li) > ol > li:first-child > :first-child,
+:not(li) > ul > li:first-child > :first-child {
+    margin-top: 0px;
+}
+
+:not(li) > ol > li:last-child > :last-child,
+:not(li) > ul > li:last-child > :last-child {
+    margin-bottom: 0px;
+}
+
+ol.simple ol p,
+ol.simple ul p,
+ul.simple ol p,
+ul.simple ul p {
+    margin-top: 0;
+}
+
+ol.simple > li:not(:first-child) > p,
+ul.simple > li:not(:first-child) > p {
+    margin-top: 0;
+}
+
+ol.simple p,
+ul.simple p {
+    margin-bottom: 0;
+}
+
+dl.footnote > dt,
+dl.citation > dt {
+    float: left;
+    margin-right: 0.5em;
+}
+
+dl.footnote > dd,
+dl.citation > dd {
+    margin-bottom: 0em;
+}
+
+dl.footnote > dd:after,
+dl.citation > dd:after {
+    content: "";
+    clear: both;
+}
+
+dl.field-list {
+    display: grid;
+    grid-template-columns: fit-content(30%) auto;
+}
+
+dl.field-list > dt {
+    font-weight: bold;
+    word-break: break-word;
+    padding-left: 0.5em;
+    padding-right: 5px;
+}
+
+dl.field-list > dt:after {
+    content: ":";
+}
+
+dl.field-list > dd {
+    padding-left: 0.5em;
+    margin-top: 0em;
+    margin-left: 0em;
+    margin-bottom: 0em;
+}
+
 dl {
     margin-bottom: 15px;
 }
 
-dd p {
+dd > :first-child {
     margin-top: 0px;
 }
 
@@ -478,6 +673,11 @@ dd {
     margin-left: 30px;
 }
 
+dl > dd:last-child,
+dl > dd:last-child > :last-child {
+    margin-bottom: 0;
+}
+
 dt:target, span.highlighted {
     background-color: #fbe54e;
 }
@@ -491,14 +691,6 @@ dl.glossary dt {
     font-size: 1.1em;
 }
 
-.optional {
-    font-size: 1.3em;
-}
-
-.sig-paren {
-    font-size: larger;
-}
-
 .versionmodified {
     font-style: italic;
 }
@@ -537,6 +729,13 @@ dl.glossary dt {
     font-style: oblique;
 }
 
+.classifier:before {
+    font-style: normal;
+    margin: 0 0.5em;
+    content: ":";
+    display: inline-block;
+}
+
 abbr, acronym {
     border-bottom: dotted 1px;
     cursor: help;
@@ -549,6 +748,10 @@ pre {
     overflow-y: hidden;  /* fixes display issues on Chrome browsers */
 }
 
+pre, div[class*="highlight-"] {
+    clear: both;
+}
+
 span.pre {
     -moz-hyphens: none;
     -ms-hyphens: none;
@@ -556,22 +759,57 @@ span.pre {
     hyphens: none;
 }
 
+div[class*="highlight-"] {
+    margin: 1em 0;
+}
+
 td.linenos pre {
-    padding: 5px 0px;
     border: 0;
     background-color: transparent;
     color: #aaa;
 }
 
 table.highlighttable {
-    margin-left: 0.5em;
+    display: block;
+}
+
+table.highlighttable tbody {
+    display: block;
+}
+
+table.highlighttable tr {
+    display: flex;
 }
 
 table.highlighttable td {
-    padding: 0 0.5em 0 0.5em;
+    margin: 0;
+    padding: 0;
+}
+
+table.highlighttable td.linenos {
+    padding-right: 0.5em;
+}
+
+table.highlighttable td.code {
+    flex: 1;
+    overflow: hidden;
+}
+
+.highlight .hll {
+    display: block;
+}
+
+div.highlight pre,
+table.highlighttable pre {
+    margin: 0;
+}
+
+div.code-block-caption + div {
+    margin-top: 0;
 }
 
 div.code-block-caption {
+    margin-top: 1em;
     padding: 2px 5px;
     font-size: small;
 }
@@ -580,8 +818,14 @@ div.code-block-caption code {
     background-color: transparent;
 }
 
-div.code-block-caption + div > div.highlight > pre {
-    margin-top: 0;
+table.highlighttable td.linenos,
+span.linenos,
+div.highlight span.gp {  /* gp: Generic.Prompt */
+  user-select: none;
+  -webkit-user-select: text; /* Safari fallback only */
+  -webkit-user-select: none; /* Chrome/Safari */
+  -moz-user-select: none; /* Firefox */
+  -ms-user-select: none; /* IE10+ */
 }
 
 div.code-block-caption span.caption-number {
@@ -593,21 +837,7 @@ div.code-block-caption span.caption-text {
 }
 
 div.literal-block-wrapper {
-    padding: 1em 1em 0;
-}
-
-div.literal-block-wrapper div.highlight {
-    margin: 0;
-}
-
-code.descname {
-    background-color: transparent;
-    font-weight: bold;
-    font-size: 1.2em;
-}
-
-code.descclassname {
-    background-color: transparent;
+    margin: 1em 0;
 }
 
 code.xref, a code {
@@ -648,8 +878,7 @@ span.eqno {
 }
 
 span.eqno a.headerlink {
-    position: relative;
-    left: 0px;
+    position: absolute;
     z-index: 1;
 }
 
diff --git a/doc/_static/classic.css b/doc/_static/classic.css
index 8c6dae4..dcae946 100644
--- a/doc/_static/classic.css
+++ b/doc/_static/classic.css
@@ -4,7 +4,7 @@
  *
  * Sphinx stylesheet -- classic theme.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -13,6 +13,11 @@
 
 /* -- page layout ----------------------------------------------------------- */
 
+html {
+    /* CSS hack for macOS's scrollbar (see #1125) */
+    background-color: #FFFFFF;
+}
+
 body {
     font-family: sans-serif;
     font-size: 100%;
@@ -219,8 +224,8 @@ p.admonition-title:after {
 
 pre {
     padding: 5px;
-    background-color: #eeffcc;
-    color: #333333;
+    background-color: unset;
+    color: unset;
     line-height: 120%;
     border: 1px solid #ac9;
     border-left: none;
@@ -233,7 +238,7 @@ code {
     font-size: 0.95em;
 }
 
-th {
+th, dl.field-list > dt {
     background-color: #ede;
 }
 
diff --git a/doc/_static/doctools.js b/doc/_static/doctools.js
index 344db17..8cbf1b1 100644
--- a/doc/_static/doctools.js
+++ b/doc/_static/doctools.js
@@ -4,7 +4,7 @@
  *
  * Sphinx JavaScript utilities for all documentation.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -29,9 +29,14 @@ if (!window.console || !console.firebug) {
 
 /**
  * small helper function to urldecode strings
+ *
+ * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent#Decoding_query_parameters_from_a_URL
  */
 jQuery.urldecode = function(x) {
-  return decodeURIComponent(x).replace(/\+/g, ' ');
+  if (!x) {
+    return x
+  }
+  return decodeURIComponent(x.replace(/\+/g, ' '));
 };
 
 /**
@@ -87,14 +92,13 @@ jQuery.fn.highlightText = function(text, className) {
           node.nextSibling));
         node.nodeValue = val.substr(0, pos);
         if (isInSVG) {
-          var bbox = span.getBBox();
           var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
-       	  rect.x.baseVal.value = bbox.x;
+          var bbox = node.parentElement.getBBox();
+          rect.x.baseVal.value = bbox.x;
           rect.y.baseVal.value = bbox.y;
           rect.width.baseVal.value = bbox.width;
           rect.height.baseVal.value = bbox.height;
           rect.setAttribute('class', className);
-          var parentOfText = node.parentNode.parentNode;
           addItems.push({
               "parent": node.parentNode,
               "target": rect});
@@ -284,10 +288,12 @@ var Documentation = {
   },
 
   initOnKeyListeners: function() {
-    $(document).keyup(function(event) {
+    $(document).keydown(function(event) {
       var activeElementType = document.activeElement.tagName;
-      // don't navigate when in search box or textarea
-      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT') {
+      // don't navigate when in search box, textarea, dropdown or button
+      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT'
+          && activeElementType !== 'BUTTON' && !event.altKey && !event.ctrlKey && !event.metaKey
+          && !event.shiftKey) {
         switch (event.keyCode) {
           case 37: // left
             var prevHref = $('link[rel="prev"]').prop('href');
@@ -295,12 +301,14 @@ var Documentation = {
               window.location.href = prevHref;
               return false;
             }
+            break;
           case 39: // right
             var nextHref = $('link[rel="next"]').prop('href');
             if (nextHref) {
               window.location.href = nextHref;
               return false;
             }
+            break;
         }
       }
     });
diff --git a/doc/_static/documentation_options.js b/doc/_static/documentation_options.js
index eb2cd09..a327859 100644
--- a/doc/_static/documentation_options.js
+++ b/doc/_static/documentation_options.js
@@ -1,10 +1,12 @@
 var DOCUMENTATION_OPTIONS = {
     URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
-    VERSION: 'd6d8386',
+    VERSION: 'e6cda17',
     LANGUAGE: 'None',
     COLLAPSE_INDEX: false,
+    BUILDER: 'html',
     FILE_SUFFIX: '.html',
+    LINK_SUFFIX: '.html',
     HAS_SOURCE: true,
     SOURCELINK_SUFFIX: '.txt',
-    NAVIGATION_WITH_KEYS: false,
+    NAVIGATION_WITH_KEYS: false
 };
\ No newline at end of file
diff --git a/doc/_static/jquery.js b/doc/_static/jquery.js
index 7e32910..624bca8 100644
--- a/doc/_static/jquery.js
+++ b/doc/_static/jquery.js
@@ -1,15 +1,13 @@
 /*!
- * jQuery JavaScript Library v3.3.1-dfsg
+ * jQuery JavaScript Library v3.6.0
  * https://jquery.com/
  *
  * Includes Sizzle.js
  * https://sizzlejs.com/
  *
- * Copyright JS Foundation and other contributors
+ * Copyright OpenJS Foundation and other contributors
  * Released under the MIT license
  * https://jquery.org/license
- *
- * Date: 2019-04-19T06:52Z
  */
 ( function( global, factory ) {
 
@@ -43,17 +41,20 @@
 // throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode
 // arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common
 // enough that all such attempts are guarded in a try block.
-
+"use strict";
 
 var arr = [];
 
-var document = window.document;
-
 var getProto = Object.getPrototypeOf;
 
 var slice = arr.slice;
 
-var concat = arr.concat;
+var flat = arr.flat ? function( array ) {
+	return arr.flat.call( array );
+} : function( array ) {
+	return arr.concat.apply( [], array );
+};
+
 
 var push = arr.push;
 
@@ -73,12 +74,16 @@ var support = {};
 
 var isFunction = function isFunction( obj ) {
 
-      // Support: Chrome <=57, Firefox <=52
-      // In some browsers, typeof returns "function" for HTML <object> elements
-      // (i.e., `typeof document.createElement( "object" ) === "function"`).
-      // We don't want to classify *any* DOM node as a function.
-      return typeof obj === "function" && typeof obj.nodeType !== "number";
-  };
+		// Support: Chrome <=57, Firefox <=52
+		// In some browsers, typeof returns "function" for HTML <object> elements
+		// (i.e., `typeof document.createElement( "object" ) === "function"`).
+		// We don't want to classify *any* DOM node as a function.
+		// Support: QtWeb <=3.8.5, WebKit <=534.34, wkhtmltopdf tool <=0.12.5
+		// Plus for old WebKit, typeof returns "function" for HTML collections
+		// (e.g., `typeof document.getElementsByTagName("div") === "function"`). (gh-4756)
+		return typeof obj === "function" && typeof obj.nodeType !== "number" &&
+			typeof obj.item !== "function";
+	};
 
 
 var isWindow = function isWindow( obj ) {
@@ -86,25 +91,40 @@ var isWindow = function isWindow( obj ) {
 	};
 
 
+var document = window.document;
+
 
 
 	var preservedScriptAttributes = {
 		type: true,
 		src: true,
+		nonce: true,
 		noModule: true
 	};
 
-	function DOMEval( code, doc, node ) {
+	function DOMEval( code, node, doc ) {
 		doc = doc || document;
 
-		var i,
+		var i, val,
 			script = doc.createElement( "script" );
 
 		script.text = code;
 		if ( node ) {
 			for ( i in preservedScriptAttributes ) {
-				if ( node[ i ] ) {
-					script[ i ] = node[ i ];
+
+				// Support: Firefox 64+, Edge 18+
+				// Some browsers don't support the "nonce" property on scripts.
+				// On the other hand, just using `getAttribute` is not enough as
+				// the `nonce` attribute is reset to an empty string whenever it
+				// becomes browsing-context connected.
+				// See https://github.com/whatwg/html/issues/2369
+				// See https://html.spec.whatwg.org/#nonce-attributes
+				// The `node.getAttribute` check was added for the sake of
+				// `jQuery.globalEval` so that it can fake a nonce-containing node
+				// via an object.
+				val = node[ i ] || node.getAttribute && node.getAttribute( i );
+				if ( val ) {
+					script.setAttribute( i, val );
 				}
 			}
 		}
@@ -129,7 +149,7 @@ function toType( obj ) {
 
 
 var
-	version = "3.3.1",
+	version = "3.6.0",
 
 	// Define a local copy of jQuery
 	jQuery = function( selector, context ) {
@@ -137,11 +157,7 @@ var
 		// The jQuery object is actually just the init constructor 'enhanced'
 		// Need init if jQuery is called (just allow error to be thrown if not included)
 		return new jQuery.fn.init( selector, context );
-	},
-
-	// Support: Android <=4.0 only
-	// Make sure we trim BOM and NBSP
-	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
+	};
 
 jQuery.fn = jQuery.prototype = {
 
@@ -207,6 +223,18 @@ jQuery.fn = jQuery.prototype = {
 		return this.eq( -1 );
 	},
 
+	even: function() {
+		return this.pushStack( jQuery.grep( this, function( _elem, i ) {
+			return ( i + 1 ) % 2;
+		} ) );
+	},
+
+	odd: function() {
+		return this.pushStack( jQuery.grep( this, function( _elem, i ) {
+			return i % 2;
+		} ) );
+	},
+
 	eq: function( i ) {
 		var len = this.length,
 			j = +i + ( i < 0 ? len : 0 );
@@ -258,7 +286,6 @@ jQuery.extend = jQuery.fn.extend = function() {
 
 			// Extend the base object
 			for ( name in options ) {
-				src = target[ name ];
 				copy = options[ name ];
 
 				// Prevent Object.prototype pollution
@@ -270,14 +297,17 @@ jQuery.extend = jQuery.fn.extend = function() {
 				// Recurse if we're merging plain objects or arrays
 				if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
 					( copyIsArray = Array.isArray( copy ) ) ) ) {
+					src = target[ name ];
 
-					if ( copyIsArray ) {
-						copyIsArray = false;
-						clone = src && Array.isArray( src ) ? src : [];
-
+					// Ensure proper type for the source value
+					if ( copyIsArray && !Array.isArray( src ) ) {
+						clone = [];
+					} else if ( !copyIsArray && !jQuery.isPlainObject( src ) ) {
+						clone = {};
 					} else {
-						clone = src && jQuery.isPlainObject( src ) ? src : {};
+						clone = src;
 					}
+					copyIsArray = false;
 
 					// Never move original objects, clone them
 					target[ name ] = jQuery.extend( deep, clone, copy );
@@ -330,9 +360,6 @@ jQuery.extend( {
 	},
 
 	isEmptyObject: function( obj ) {
-
-		/* eslint-disable no-unused-vars */
-		// See https://github.com/eslint/eslint/issues/6125
 		var name;
 
 		for ( name in obj ) {
@@ -341,9 +368,10 @@ jQuery.extend( {
 		return true;
 	},
 
-	// Evaluates a script in a global context
-	globalEval: function( code ) {
-		DOMEval( code );
+	// Evaluates a script in a provided context; falls back to the global one
+	// if not specified.
+	globalEval: function( code, options, doc ) {
+		DOMEval( code, { nonce: options && options.nonce }, doc );
 	},
 
 	each: function( obj, callback ) {
@@ -367,13 +395,6 @@ jQuery.extend( {
 		return obj;
 	},
 
-	// Support: Android <=4.0 only
-	trim: function( text ) {
-		return text == null ?
-			"" :
-			( text + "" ).replace( rtrim, "" );
-	},
-
 	// results is for internal usage only
 	makeArray: function( arr, results ) {
 		var ret = results || [];
@@ -382,7 +403,7 @@ jQuery.extend( {
 			if ( isArrayLike( Object( arr ) ) ) {
 				jQuery.merge( ret,
 					typeof arr === "string" ?
-					[ arr ] : arr
+						[ arr ] : arr
 				);
 			} else {
 				push.call( ret, arr );
@@ -460,7 +481,7 @@ jQuery.extend( {
 		}
 
 		// Flatten any nested arrays
-		return concat.apply( [], ret );
+		return flat( ret );
 	},
 
 	// A global GUID counter for objects
@@ -477,9 +498,9 @@ if ( typeof Symbol === "function" ) {
 
 // Populate the class2type map
 jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),
-function( i, name ) {
-	class2type[ "[object " + name + "]" ] = name.toLowerCase();
-} );
+	function( _i, name ) {
+		class2type[ "[object " + name + "]" ] = name.toLowerCase();
+	} );
 
 function isArrayLike( obj ) {
 
@@ -499,17 +520,16 @@ function isArrayLike( obj ) {
 }
 var Sizzle =
 /*!
- * Sizzle CSS Selector Engine v2.3.3
+ * Sizzle CSS Selector Engine v2.3.6
  * https://sizzlejs.com/
  *
- * Copyright jQuery Foundation and other contributors
+ * Copyright JS Foundation and other contributors
  * Released under the MIT license
- * http://jquery.org/license
+ * https://js.foundation/
  *
- * Date: 2016-08-08
+ * Date: 2021-02-16
  */
-(function( window ) {
-
+( function( window ) {
 var i,
 	support,
 	Expr,
@@ -540,6 +560,7 @@ var i,
 	classCache = createCache(),
 	tokenCache = createCache(),
 	compilerCache = createCache(),
+	nonnativeSelectorCache = createCache(),
 	sortOrder = function( a, b ) {
 		if ( a === b ) {
 			hasDuplicate = true;
@@ -548,61 +569,71 @@ var i,
 	},
 
 	// Instance methods
-	hasOwn = ({}).hasOwnProperty,
+	hasOwn = ( {} ).hasOwnProperty,
 	arr = [],
 	pop = arr.pop,
-	push_native = arr.push,
+	pushNative = arr.push,
 	push = arr.push,
 	slice = arr.slice,
+
 	// Use a stripped-down indexOf as it's faster than native
 	// https://jsperf.com/thor-indexof-vs-for/5
 	indexOf = function( list, elem ) {
 		var i = 0,
 			len = list.length;
 		for ( ; i < len; i++ ) {
-			if ( list[i] === elem ) {
+			if ( list[ i ] === elem ) {
 				return i;
 			}
 		}
 		return -1;
 	},
 
-	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
+	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|" +
+		"ismap|loop|multiple|open|readonly|required|scoped",
 
 	// Regular expressions
 
 	// http://www.w3.org/TR/css3-selectors/#whitespace
 	whitespace = "[\\x20\\t\\r\\n\\f]",
 
-	// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
-	identifier = "(?:\\\\.|[\\w-]|[^\0-\\xa0])+",
+	// https://www.w3.org/TR/css-syntax-3/#ident-token-diagram
+	identifier = "(?:\\\\[\\da-fA-F]{1,6}" + whitespace +
+		"?|\\\\[^\\r\\n\\f]|[\\w-]|[^\0-\\x7f])+",
 
 	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
 	attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
+
 		// Operator (capture 2)
 		"*([*^$|!~]?=)" + whitespace +
-		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
-		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
-		"*\\]",
+
+		// "Attribute values must be CSS identifiers [capture 5]
+		// or strings [capture 3 or capture 4]"
+		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" +
+		whitespace + "*\\]",
 
 	pseudos = ":(" + identifier + ")(?:\\((" +
+
 		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
 		// 1. quoted (capture 3; capture 4 or capture 5)
 		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
+
 		// 2. simple (capture 6)
 		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
+
 		// 3. anything else (capture 2)
 		".*" +
 		")\\)|)",
 
 	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
 	rwhitespace = new RegExp( whitespace + "+", "g" ),
-	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" +
+		whitespace + "+$", "g" ),
 
 	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
-	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
-
-	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace +
+		"*" ),
+	rdescend = new RegExp( whitespace + "|>" ),
 
 	rpseudo = new RegExp( pseudos ),
 	ridentifier = new RegExp( "^" + identifier + "$" ),
@@ -613,16 +644,19 @@ var i,
 		"TAG": new RegExp( "^(" + identifier + "|[*])" ),
 		"ATTR": new RegExp( "^" + attributes ),
 		"PSEUDO": new RegExp( "^" + pseudos ),
-		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
-			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
-			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" +
+			whitespace + "*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" +
+			whitespace + "*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
 		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
+
 		// For use in libraries implementing .is()
 		// We use this for POS matching in `select`
-		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
-			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
+		"needsContext": new RegExp( "^" + whitespace +
+			"*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" + whitespace +
+			"*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
 	},
 
+	rhtml = /HTML$/i,
 	rinputs = /^(?:input|select|textarea|button)$/i,
 	rheader = /^h\d$/i,
 
@@ -635,18 +669,21 @@ var i,
 
 	// CSS escapes
 	// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
-	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
-	funescape = function( _, escaped, escapedWhitespace ) {
-		var high = "0x" + escaped - 0x10000;
-		// NaN means non-codepoint
-		// Support: Firefox<24
-		// Workaround erroneous numeric interpretation of +"0x"
-		return high !== high || escapedWhitespace ?
-			escaped :
+	runescape = new RegExp( "\\\\[\\da-fA-F]{1,6}" + whitespace + "?|\\\\([^\\r\\n\\f])", "g" ),
+	funescape = function( escape, nonHex ) {
+		var high = "0x" + escape.slice( 1 ) - 0x10000;
+
+		return nonHex ?
+
+			// Strip the backslash prefix from a non-hex escape sequence
+			nonHex :
+
+			// Replace a hexadecimal escape sequence with the encoded Unicode code point
+			// Support: IE <=11+
+			// For values outside the Basic Multilingual Plane (BMP), manually construct a
+			// surrogate pair
 			high < 0 ?
-				// BMP codepoint
 				String.fromCharCode( high + 0x10000 ) :
-				// Supplemental Plane codepoint (surrogate pair)
 				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
 	},
 
@@ -662,7 +699,8 @@ var i,
 			}
 
 			// Control characters and (dependent upon position) numbers get escaped as code points
-			return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
+			return ch.slice( 0, -1 ) + "\\" +
+				ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
 		}
 
 		// Other potentially-special ASCII characters get backslash-escaped
@@ -677,9 +715,9 @@ var i,
 		setDocument();
 	},
 
-	disabledAncestor = addCombinator(
+	inDisabledFieldset = addCombinator(
 		function( elem ) {
-			return elem.disabled === true && ("form" in elem || "label" in elem);
+			return elem.disabled === true && elem.nodeName.toLowerCase() === "fieldset";
 		},
 		{ dir: "parentNode", next: "legend" }
 	);
@@ -687,18 +725,20 @@ var i,
 // Optimize for push.apply( _, NodeList )
 try {
 	push.apply(
-		(arr = slice.call( preferredDoc.childNodes )),
+		( arr = slice.call( preferredDoc.childNodes ) ),
 		preferredDoc.childNodes
 	);
+
 	// Support: Android<4.0
 	// Detect silently failing push.apply
+	// eslint-disable-next-line no-unused-expressions
 	arr[ preferredDoc.childNodes.length ].nodeType;
 } catch ( e ) {
 	push = { apply: arr.length ?
 
 		// Leverage slice if possible
 		function( target, els ) {
-			push_native.apply( target, slice.call(els) );
+			pushNative.apply( target, slice.call( els ) );
 		} :
 
 		// Support: IE<9
@@ -706,8 +746,9 @@ try {
 		function( target, els ) {
 			var j = target.length,
 				i = 0;
+
 			// Can't trust NodeList.length
-			while ( (target[j++] = els[i++]) ) {}
+			while ( ( target[ j++ ] = els[ i++ ] ) ) {}
 			target.length = j - 1;
 		}
 	};
@@ -731,24 +772,21 @@ function Sizzle( selector, context, results, seed ) {
 
 	// Try to shortcut find operations (as opposed to filters) in HTML documents
 	if ( !seed ) {
-
-		if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
-			setDocument( context );
-		}
+		setDocument( context );
 		context = context || document;
 
 		if ( documentIsHTML ) {
 
 			// If the selector is sufficiently simple, try using a "get*By*" DOM method
 			// (excepting DocumentFragment context, where the methods don't exist)
-			if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
+			if ( nodeType !== 11 && ( match = rquickExpr.exec( selector ) ) ) {
 
 				// ID selector
-				if ( (m = match[1]) ) {
+				if ( ( m = match[ 1 ] ) ) {
 
 					// Document context
 					if ( nodeType === 9 ) {
-						if ( (elem = context.getElementById( m )) ) {
+						if ( ( elem = context.getElementById( m ) ) ) {
 
 							// Support: IE, Opera, Webkit
 							// TODO: identify versions
@@ -767,7 +805,7 @@ function Sizzle( selector, context, results, seed ) {
 						// Support: IE, Opera, Webkit
 						// TODO: identify versions
 						// getElementById can match elements by name instead of ID
-						if ( newContext && (elem = newContext.getElementById( m )) &&
+						if ( newContext && ( elem = newContext.getElementById( m ) ) &&
 							contains( context, elem ) &&
 							elem.id === m ) {
 
@@ -777,12 +815,12 @@ function Sizzle( selector, context, results, seed ) {
 					}
 
 				// Type selector
-				} else if ( match[2] ) {
+				} else if ( match[ 2 ] ) {
 					push.apply( results, context.getElementsByTagName( selector ) );
 					return results;
 
 				// Class selector
-				} else if ( (m = match[3]) && support.getElementsByClassName &&
+				} else if ( ( m = match[ 3 ] ) && support.getElementsByClassName &&
 					context.getElementsByClassName ) {
 
 					push.apply( results, context.getElementsByClassName( m ) );
@@ -792,50 +830,62 @@ function Sizzle( selector, context, results, seed ) {
 
 			// Take advantage of querySelectorAll
 			if ( support.qsa &&
-				!compilerCache[ selector + " " ] &&
-				(!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
+				!nonnativeSelectorCache[ selector + " " ] &&
+				( !rbuggyQSA || !rbuggyQSA.test( selector ) ) &&
 
-				if ( nodeType !== 1 ) {
-					newContext = context;
-					newSelector = selector;
-
-				// qSA looks outside Element context, which is not what we want
-				// Thanks to Andrew Dupont for this workaround technique
-				// Support: IE <=8
+				// Support: IE 8 only
 				// Exclude object elements
-				} else if ( context.nodeName.toLowerCase() !== "object" ) {
+				( nodeType !== 1 || context.nodeName.toLowerCase() !== "object" ) ) {
 
-					// Capture the context ID, setting it first if necessary
-					if ( (nid = context.getAttribute( "id" )) ) {
-						nid = nid.replace( rcssescape, fcssescape );
-					} else {
-						context.setAttribute( "id", (nid = expando) );
+				newSelector = selector;
+				newContext = context;
+
+				// qSA considers elements outside a scoping root when evaluating child or
+				// descendant combinators, which is not what we want.
+				// In such cases, we work around the behavior by prefixing every selector in the
+				// list with an ID selector referencing the scope context.
+				// The technique has to be used as well when a leading combinator is used
+				// as such selectors are not recognized by querySelectorAll.
+				// Thanks to Andrew Dupont for this technique.
+				if ( nodeType === 1 &&
+					( rdescend.test( selector ) || rcombinators.test( selector ) ) ) {
+
+					// Expand context for sibling selectors
+					newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
+						context;
+
+					// We can use :scope instead of the ID hack if the browser
+					// supports it & if we're not changing the context.
+					if ( newContext !== context || !support.scope ) {
+
+						// Capture the context ID, setting it first if necessary
+						if ( ( nid = context.getAttribute( "id" ) ) ) {
+							nid = nid.replace( rcssescape, fcssescape );
+						} else {
+							context.setAttribute( "id", ( nid = expando ) );
+						}
 					}
 
 					// Prefix every selector in the list
 					groups = tokenize( selector );
 					i = groups.length;
 					while ( i-- ) {
-						groups[i] = "#" + nid + " " + toSelector( groups[i] );
+						groups[ i ] = ( nid ? "#" + nid : ":scope" ) + " " +
+							toSelector( groups[ i ] );
 					}
 					newSelector = groups.join( "," );
-
-					// Expand context for sibling selectors
-					newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
-						context;
 				}
 
-				if ( newSelector ) {
-					try {
-						push.apply( results,
-							newContext.querySelectorAll( newSelector )
-						);
-						return results;
-					} catch ( qsaError ) {
-					} finally {
-						if ( nid === expando ) {
-							context.removeAttribute( "id" );
-						}
+				try {
+					push.apply( results,
+						newContext.querySelectorAll( newSelector )
+					);
+					return results;
+				} catch ( qsaError ) {
+					nonnativeSelectorCache( selector, true );
+				} finally {
+					if ( nid === expando ) {
+						context.removeAttribute( "id" );
 					}
 				}
 			}
@@ -856,12 +906,14 @@ function createCache() {
 	var keys = [];
 
 	function cache( key, value ) {
+
 		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
 		if ( keys.push( key + " " ) > Expr.cacheLength ) {
+
 			// Only keep the most recent entries
 			delete cache[ keys.shift() ];
 		}
-		return (cache[ key + " " ] = value);
+		return ( cache[ key + " " ] = value );
 	}
 	return cache;
 }
@@ -880,17 +932,19 @@ function markFunction( fn ) {
  * @param {Function} fn Passed the created element and returns a boolean result
  */
 function assert( fn ) {
-	var el = document.createElement("fieldset");
+	var el = document.createElement( "fieldset" );
 
 	try {
 		return !!fn( el );
-	} catch (e) {
+	} catch ( e ) {
 		return false;
 	} finally {
+
 		// Remove from its parent by default
 		if ( el.parentNode ) {
 			el.parentNode.removeChild( el );
 		}
+
 		// release memory in IE
 		el = null;
 	}
@@ -902,11 +956,11 @@ function assert( fn ) {
  * @param {Function} handler The method that will be applied
  */
 function addHandle( attrs, handler ) {
-	var arr = attrs.split("|"),
+	var arr = attrs.split( "|" ),
 		i = arr.length;
 
 	while ( i-- ) {
-		Expr.attrHandle[ arr[i] ] = handler;
+		Expr.attrHandle[ arr[ i ] ] = handler;
 	}
 }
 
@@ -928,7 +982,7 @@ function siblingCheck( a, b ) {
 
 	// Check if b follows a
 	if ( cur ) {
-		while ( (cur = cur.nextSibling) ) {
+		while ( ( cur = cur.nextSibling ) ) {
 			if ( cur === b ) {
 				return -1;
 			}
@@ -956,7 +1010,7 @@ function createInputPseudo( type ) {
 function createButtonPseudo( type ) {
 	return function( elem ) {
 		var name = elem.nodeName.toLowerCase();
-		return (name === "input" || name === "button") && elem.type === type;
+		return ( name === "input" || name === "button" ) && elem.type === type;
 	};
 }
 
@@ -999,7 +1053,7 @@ function createDisabledPseudo( disabled ) {
 					// Where there is no isDisabled, check manually
 					/* jshint -W018 */
 					elem.isDisabled !== !disabled &&
-						disabledAncestor( elem ) === disabled;
+					inDisabledFieldset( elem ) === disabled;
 			}
 
 			return elem.disabled === disabled;
@@ -1021,21 +1075,21 @@ function createDisabledPseudo( disabled ) {
  * @param {Function} fn
  */
 function createPositionalPseudo( fn ) {
-	return markFunction(function( argument ) {
+	return markFunction( function( argument ) {
 		argument = +argument;
-		return markFunction(function( seed, matches ) {
+		return markFunction( function( seed, matches ) {
 			var j,
 				matchIndexes = fn( [], seed.length, argument ),
 				i = matchIndexes.length;
 
 			// Match elements found at the specified indexes
 			while ( i-- ) {
-				if ( seed[ (j = matchIndexes[i]) ] ) {
-					seed[j] = !(matches[j] = seed[j]);
+				if ( seed[ ( j = matchIndexes[ i ] ) ] ) {
+					seed[ j ] = !( matches[ j ] = seed[ j ] );
 				}
 			}
-		});
-	});
+		} );
+	} );
 }
 
 /**
@@ -1056,10 +1110,13 @@ support = Sizzle.support = {};
  * @returns {Boolean} True iff elem is a non-HTML XML node
  */
 isXML = Sizzle.isXML = function( elem ) {
-	// documentElement is verified for cases where it doesn't yet exist
-	// (such as loading iframes in IE - #4833)
-	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
-	return documentElement ? documentElement.nodeName !== "HTML" : false;
+	var namespace = elem && elem.namespaceURI,
+		docElem = elem && ( elem.ownerDocument || elem ).documentElement;
+
+	// Support: IE <=8
+	// Assume HTML when documentElement doesn't yet exist, such as inside loading iframes
+	// https://bugs.jquery.com/ticket/4833
+	return !rhtml.test( namespace || docElem && docElem.nodeName || "HTML" );
 };
 
 /**
@@ -1072,7 +1129,11 @@ setDocument = Sizzle.setDocument = function( node ) {
 		doc = node ? node.ownerDocument || node : preferredDoc;
 
 	// Return early if doc is invalid or already selected
-	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
+	// Support: IE 11+, Edge 17 - 18+
+	// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+	// two documents; shallow comparisons work.
+	// eslint-disable-next-line eqeqeq
+	if ( doc == document || doc.nodeType !== 9 || !doc.documentElement ) {
 		return document;
 	}
 
@@ -1081,10 +1142,14 @@ setDocument = Sizzle.setDocument = function( node ) {
 	docElem = document.documentElement;
 	documentIsHTML = !isXML( document );
 
-	// Support: IE 9-11, Edge
+	// Support: IE 9 - 11+, Edge 12 - 18+
 	// Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
-	if ( preferredDoc !== document &&
-		(subWindow = document.defaultView) && subWindow.top !== subWindow ) {
+	// Support: IE 11+, Edge 17 - 18+
+	// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+	// two documents; shallow comparisons work.
+	// eslint-disable-next-line eqeqeq
+	if ( preferredDoc != document &&
+		( subWindow = document.defaultView ) && subWindow.top !== subWindow ) {
 
 		// Support: IE 11, Edge
 		if ( subWindow.addEventListener ) {
@@ -1096,25 +1161,36 @@ setDocument = Sizzle.setDocument = function( node ) {
 		}
 	}
 
+	// Support: IE 8 - 11+, Edge 12 - 18+, Chrome <=16 - 25 only, Firefox <=3.6 - 31 only,
+	// Safari 4 - 5 only, Opera <=11.6 - 12.x only
+	// IE/Edge & older browsers don't support the :scope pseudo-class.
+	// Support: Safari 6.0 only
+	// Safari 6.0 supports :scope but it's an alias of :root there.
+	support.scope = assert( function( el ) {
+		docElem.appendChild( el ).appendChild( document.createElement( "div" ) );
+		return typeof el.querySelectorAll !== "undefined" &&
+			!el.querySelectorAll( ":scope fieldset div" ).length;
+	} );
+
 	/* Attributes
 	---------------------------------------------------------------------- */
 
 	// Support: IE<8
 	// Verify that getAttribute really returns attributes and not properties
 	// (excepting IE8 booleans)
-	support.attributes = assert(function( el ) {
+	support.attributes = assert( function( el ) {
 		el.className = "i";
-		return !el.getAttribute("className");
-	});
+		return !el.getAttribute( "className" );
+	} );
 
 	/* getElement(s)By*
 	---------------------------------------------------------------------- */
 
 	// Check if getElementsByTagName("*") returns only elements
-	support.getElementsByTagName = assert(function( el ) {
-		el.appendChild( document.createComment("") );
-		return !el.getElementsByTagName("*").length;
-	});
+	support.getElementsByTagName = assert( function( el ) {
+		el.appendChild( document.createComment( "" ) );
+		return !el.getElementsByTagName( "*" ).length;
+	} );
 
 	// Support: IE<9
 	support.getElementsByClassName = rnative.test( document.getElementsByClassName );
@@ -1123,38 +1199,38 @@ setDocument = Sizzle.setDocument = function( node ) {
 	// Check if getElementById returns elements by name
 	// The broken getElementById methods don't pick up programmatically-set names,
 	// so use a roundabout getElementsByName test
-	support.getById = assert(function( el ) {
+	support.getById = assert( function( el ) {
 		docElem.appendChild( el ).id = expando;
 		return !document.getElementsByName || !document.getElementsByName( expando ).length;
-	});
+	} );
 
 	// ID filter and find
 	if ( support.getById ) {
-		Expr.filter["ID"] = function( id ) {
+		Expr.filter[ "ID" ] = function( id ) {
 			var attrId = id.replace( runescape, funescape );
 			return function( elem ) {
-				return elem.getAttribute("id") === attrId;
+				return elem.getAttribute( "id" ) === attrId;
 			};
 		};
-		Expr.find["ID"] = function( id, context ) {
+		Expr.find[ "ID" ] = function( id, context ) {
 			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
 				var elem = context.getElementById( id );
 				return elem ? [ elem ] : [];
 			}
 		};
 	} else {
-		Expr.filter["ID"] =  function( id ) {
+		Expr.filter[ "ID" ] =  function( id ) {
 			var attrId = id.replace( runescape, funescape );
 			return function( elem ) {
 				var node = typeof elem.getAttributeNode !== "undefined" &&
-					elem.getAttributeNode("id");
+					elem.getAttributeNode( "id" );
 				return node && node.value === attrId;
 			};
 		};
 
 		// Support: IE 6 - 7 only
 		// getElementById is not reliable as a find shortcut
-		Expr.find["ID"] = function( id, context ) {
+		Expr.find[ "ID" ] = function( id, context ) {
 			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
 				var node, i, elems,
 					elem = context.getElementById( id );
@@ -1162,7 +1238,7 @@ setDocument = Sizzle.setDocument = function( node ) {
 				if ( elem ) {
 
 					// Verify the id attribute
-					node = elem.getAttributeNode("id");
+					node = elem.getAttributeNode( "id" );
 					if ( node && node.value === id ) {
 						return [ elem ];
 					}
@@ -1170,8 +1246,8 @@ setDocument = Sizzle.setDocument = function( node ) {
 					// Fall back on getElementsByName
 					elems = context.getElementsByName( id );
 					i = 0;
-					while ( (elem = elems[i++]) ) {
-						node = elem.getAttributeNode("id");
+					while ( ( elem = elems[ i++ ] ) ) {
+						node = elem.getAttributeNode( "id" );
 						if ( node && node.value === id ) {
 							return [ elem ];
 						}
@@ -1184,7 +1260,7 @@ setDocument = Sizzle.setDocument = function( node ) {
 	}
 
 	// Tag
-	Expr.find["TAG"] = support.getElementsByTagName ?
+	Expr.find[ "TAG" ] = support.getElementsByTagName ?
 		function( tag, context ) {
 			if ( typeof context.getElementsByTagName !== "undefined" ) {
 				return context.getElementsByTagName( tag );
@@ -1199,12 +1275,13 @@ setDocument = Sizzle.setDocument = function( node ) {
 			var elem,
 				tmp = [],
 				i = 0,
+
 				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
 				results = context.getElementsByTagName( tag );
 
 			// Filter out possible comments
 			if ( tag === "*" ) {
-				while ( (elem = results[i++]) ) {
+				while ( ( elem = results[ i++ ] ) ) {
 					if ( elem.nodeType === 1 ) {
 						tmp.push( elem );
 					}
@@ -1216,7 +1293,7 @@ setDocument = Sizzle.setDocument = function( node ) {
 		};
 
 	// Class
-	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
+	Expr.find[ "CLASS" ] = support.getElementsByClassName && function( className, context ) {
 		if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
 			return context.getElementsByClassName( className );
 		}
@@ -1237,10 +1314,14 @@ setDocument = Sizzle.setDocument = function( node ) {
 	// See https://bugs.jquery.com/ticket/13378
 	rbuggyQSA = [];
 
-	if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
+	if ( ( support.qsa = rnative.test( document.querySelectorAll ) ) ) {
+
 		// Build QSA regex
 		// Regex strategy adopted from Diego Perini
-		assert(function( el ) {
+		assert( function( el ) {
+
+			var input;
+
 			// Select is set to empty string on purpose
 			// This is to test IE's treatment of not explicitly
 			// setting a boolean content attribute,
@@ -1254,78 +1335,98 @@ setDocument = Sizzle.setDocument = function( node ) {
 			// Nothing should be selected when empty strings follow ^= or $= or *=
 			// The test attribute must be unknown in Opera but "safe" for WinRT
 			// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
-			if ( el.querySelectorAll("[msallowcapture^='']").length ) {
+			if ( el.querySelectorAll( "[msallowcapture^='']" ).length ) {
 				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
 			}
 
 			// Support: IE8
 			// Boolean attributes and "value" are not treated correctly
-			if ( !el.querySelectorAll("[selected]").length ) {
+			if ( !el.querySelectorAll( "[selected]" ).length ) {
 				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
 			}
 
 			// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
 			if ( !el.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
-				rbuggyQSA.push("~=");
+				rbuggyQSA.push( "~=" );
+			}
+
+			// Support: IE 11+, Edge 15 - 18+
+			// IE 11/Edge don't find elements on a `[name='']` query in some cases.
+			// Adding a temporary attribute to the document before the selection works
+			// around the issue.
+			// Interestingly, IE 10 & older don't seem to have the issue.
+			input = document.createElement( "input" );
+			input.setAttribute( "name", "" );
+			el.appendChild( input );
+			if ( !el.querySelectorAll( "[name='']" ).length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*name" + whitespace + "*=" +
+					whitespace + "*(?:''|\"\")" );
 			}
 
 			// Webkit/Opera - :checked should return selected option elements
 			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
 			// IE8 throws error here and will not see later tests
-			if ( !el.querySelectorAll(":checked").length ) {
-				rbuggyQSA.push(":checked");
+			if ( !el.querySelectorAll( ":checked" ).length ) {
+				rbuggyQSA.push( ":checked" );
 			}
 
 			// Support: Safari 8+, iOS 8+
 			// https://bugs.webkit.org/show_bug.cgi?id=136851
 			// In-page `selector#id sibling-combinator selector` fails
 			if ( !el.querySelectorAll( "a#" + expando + "+*" ).length ) {
-				rbuggyQSA.push(".#.+[+~]");
+				rbuggyQSA.push( ".#.+[+~]" );
 			}
-		});
 
-		assert(function( el ) {
+			// Support: Firefox <=3.6 - 5 only
+			// Old Firefox doesn't throw on a badly-escaped identifier.
+			el.querySelectorAll( "\\\f" );
+			rbuggyQSA.push( "[\\r\\n\\f]" );
+		} );
+
+		assert( function( el ) {
 			el.innerHTML = "<a href='' disabled='disabled'></a>" +
 				"<select disabled='disabled'><option/></select>";
 
 			// Support: Windows 8 Native Apps
 			// The type and name attributes are restricted during .innerHTML assignment
-			var input = document.createElement("input");
+			var input = document.createElement( "input" );
 			input.setAttribute( "type", "hidden" );
 			el.appendChild( input ).setAttribute( "name", "D" );
 
 			// Support: IE8
 			// Enforce case-sensitivity of name attribute
-			if ( el.querySelectorAll("[name=d]").length ) {
+			if ( el.querySelectorAll( "[name=d]" ).length ) {
 				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
 			}
 
 			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
 			// IE8 throws error here and will not see later tests
-			if ( el.querySelectorAll(":enabled").length !== 2 ) {
+			if ( el.querySelectorAll( ":enabled" ).length !== 2 ) {
 				rbuggyQSA.push( ":enabled", ":disabled" );
 			}
 
 			// Support: IE9-11+
 			// IE's :disabled selector does not pick up the children of disabled fieldsets
 			docElem.appendChild( el ).disabled = true;
-			if ( el.querySelectorAll(":disabled").length !== 2 ) {
+			if ( el.querySelectorAll( ":disabled" ).length !== 2 ) {
 				rbuggyQSA.push( ":enabled", ":disabled" );
 			}
 
+			// Support: Opera 10 - 11 only
 			// Opera 10-11 does not throw on post-comma invalid pseudos
-			el.querySelectorAll("*,:x");
-			rbuggyQSA.push(",.*:");
-		});
+			el.querySelectorAll( "*,:x" );
+			rbuggyQSA.push( ",.*:" );
+		} );
 	}
 
-	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
+	if ( ( support.matchesSelector = rnative.test( ( matches = docElem.matches ||
 		docElem.webkitMatchesSelector ||
 		docElem.mozMatchesSelector ||
 		docElem.oMatchesSelector ||
-		docElem.msMatchesSelector) )) ) {
+		docElem.msMatchesSelector ) ) ) ) {
+
+		assert( function( el ) {
 
-		assert(function( el ) {
 			// Check to see if it's possible to do matchesSelector
 			// on a disconnected node (IE 9)
 			support.disconnectedMatch = matches.call( el, "*" );
@@ -1334,11 +1435,11 @@ setDocument = Sizzle.setDocument = function( node ) {
 			// Gecko does not error, returns false instead
 			matches.call( el, "[s!='']:x" );
 			rbuggyMatches.push( "!=", pseudos );
-		});
+		} );
 	}
 
-	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
-	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
+	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join( "|" ) );
+	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join( "|" ) );
 
 	/* Contains
 	---------------------------------------------------------------------- */
@@ -1355,11 +1456,11 @@ setDocument = Sizzle.setDocument = function( node ) {
 				adown.contains ?
 					adown.contains( bup ) :
 					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
-			));
+			) );
 		} :
 		function( a, b ) {
 			if ( b ) {
-				while ( (b = b.parentNode) ) {
+				while ( ( b = b.parentNode ) ) {
 					if ( b === a ) {
 						return true;
 					}
@@ -1388,7 +1489,11 @@ setDocument = Sizzle.setDocument = function( node ) {
 		}
 
 		// Calculate position if both inputs belong to the same document
-		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
+		// Support: IE 11+, Edge 17 - 18+
+		// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+		// two documents; shallow comparisons work.
+		// eslint-disable-next-line eqeqeq
+		compare = ( a.ownerDocument || a ) == ( b.ownerDocument || b ) ?
 			a.compareDocumentPosition( b ) :
 
 			// Otherwise we know they are disconnected
@@ -1396,13 +1501,24 @@ setDocument = Sizzle.setDocument = function( node ) {
 
 		// Disconnected nodes
 		if ( compare & 1 ||
-			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
+			( !support.sortDetached && b.compareDocumentPosition( a ) === compare ) ) {
 
 			// Choose the first element that is related to our preferred document
-			if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
+			// Support: IE 11+, Edge 17 - 18+
+			// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+			// two documents; shallow comparisons work.
+			// eslint-disable-next-line eqeqeq
+			if ( a == document || a.ownerDocument == preferredDoc &&
+				contains( preferredDoc, a ) ) {
 				return -1;
 			}
-			if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
+
+			// Support: IE 11+, Edge 17 - 18+
+			// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+			// two documents; shallow comparisons work.
+			// eslint-disable-next-line eqeqeq
+			if ( b == document || b.ownerDocument == preferredDoc &&
+				contains( preferredDoc, b ) ) {
 				return 1;
 			}
 
@@ -1415,6 +1531,7 @@ setDocument = Sizzle.setDocument = function( node ) {
 		return compare & 4 ? -1 : 1;
 	} :
 	function( a, b ) {
+
 		// Exit early if the nodes are identical
 		if ( a === b ) {
 			hasDuplicate = true;
@@ -1430,8 +1547,14 @@ setDocument = Sizzle.setDocument = function( node ) {
 
 		// Parentless nodes are either documents or disconnected
 		if ( !aup || !bup ) {
-			return a === document ? -1 :
-				b === document ? 1 :
+
+			// Support: IE 11+, Edge 17 - 18+
+			// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+			// two documents; shallow comparisons work.
+			/* eslint-disable eqeqeq */
+			return a == document ? -1 :
+				b == document ? 1 :
+				/* eslint-enable eqeqeq */
 				aup ? -1 :
 				bup ? 1 :
 				sortInput ?
@@ -1445,26 +1568,32 @@ setDocument = Sizzle.setDocument = function( node ) {
 
 		// Otherwise we need full lists of their ancestors for comparison
 		cur = a;
-		while ( (cur = cur.parentNode) ) {
+		while ( ( cur = cur.parentNode ) ) {
 			ap.unshift( cur );
 		}
 		cur = b;
-		while ( (cur = cur.parentNode) ) {
+		while ( ( cur = cur.parentNode ) ) {
 			bp.unshift( cur );
 		}
 
 		// Walk down the tree looking for a discrepancy
-		while ( ap[i] === bp[i] ) {
+		while ( ap[ i ] === bp[ i ] ) {
 			i++;
 		}
 
 		return i ?
+
 			// Do a sibling check if the nodes have a common ancestor
-			siblingCheck( ap[i], bp[i] ) :
+			siblingCheck( ap[ i ], bp[ i ] ) :
 
 			// Otherwise nodes in our document sort first
-			ap[i] === preferredDoc ? -1 :
-			bp[i] === preferredDoc ? 1 :
+			// Support: IE 11+, Edge 17 - 18+
+			// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+			// two documents; shallow comparisons work.
+			/* eslint-disable eqeqeq */
+			ap[ i ] == preferredDoc ? -1 :
+			bp[ i ] == preferredDoc ? 1 :
+			/* eslint-enable eqeqeq */
 			0;
 	};
 
@@ -1476,16 +1605,10 @@ Sizzle.matches = function( expr, elements ) {
 };
 
 Sizzle.matchesSelector = function( elem, expr ) {
-	// Set document vars if needed
-	if ( ( elem.ownerDocument || elem ) !== document ) {
-		setDocument( elem );
-	}
-
-	// Make sure that attribute selectors are quoted
-	expr = expr.replace( rattributeQuotes, "='$1']" );
+	setDocument( elem );
 
 	if ( support.matchesSelector && documentIsHTML &&
-		!compilerCache[ expr + " " ] &&
+		!nonnativeSelectorCache[ expr + " " ] &&
 		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
 		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
 
@@ -1494,32 +1617,46 @@ Sizzle.matchesSelector = function( elem, expr ) {
 
 			// IE 9's matchesSelector returns false on disconnected nodes
 			if ( ret || support.disconnectedMatch ||
-					// As well, disconnected nodes are said to be in a document
-					// fragment in IE 9
-					elem.document && elem.document.nodeType !== 11 ) {
+
+				// As well, disconnected nodes are said to be in a document
+				// fragment in IE 9
+				elem.document && elem.document.nodeType !== 11 ) {
 				return ret;
 			}
-		} catch (e) {}
+		} catch ( e ) {
+			nonnativeSelectorCache( expr, true );
+		}
 	}
 
 	return Sizzle( expr, document, null, [ elem ] ).length > 0;
 };
 
 Sizzle.contains = function( context, elem ) {
+
 	// Set document vars if needed
-	if ( ( context.ownerDocument || context ) !== document ) {
+	// Support: IE 11+, Edge 17 - 18+
+	// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+	// two documents; shallow comparisons work.
+	// eslint-disable-next-line eqeqeq
+	if ( ( context.ownerDocument || context ) != document ) {
 		setDocument( context );
 	}
 	return contains( context, elem );
 };
 
 Sizzle.attr = function( elem, name ) {
+
 	// Set document vars if needed
-	if ( ( elem.ownerDocument || elem ) !== document ) {
+	// Support: IE 11+, Edge 17 - 18+
+	// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+	// two documents; shallow comparisons work.
+	// eslint-disable-next-line eqeqeq
+	if ( ( elem.ownerDocument || elem ) != document ) {
 		setDocument( elem );
 	}
 
 	var fn = Expr.attrHandle[ name.toLowerCase() ],
+
 		// Don't get fooled by Object.prototype properties (jQuery #13807)
 		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
 			fn( elem, name, !documentIsHTML ) :
@@ -1529,13 +1666,13 @@ Sizzle.attr = function( elem, name ) {
 		val :
 		support.attributes || !documentIsHTML ?
 			elem.getAttribute( name ) :
-			(val = elem.getAttributeNode(name)) && val.specified ?
+			( val = elem.getAttributeNode( name ) ) && val.specified ?
 				val.value :
 				null;
 };
 
 Sizzle.escape = function( sel ) {
-	return (sel + "").replace( rcssescape, fcssescape );
+	return ( sel + "" ).replace( rcssescape, fcssescape );
 };
 
 Sizzle.error = function( msg ) {
@@ -1558,7 +1695,7 @@ Sizzle.uniqueSort = function( results ) {
 	results.sort( sortOrder );
 
 	if ( hasDuplicate ) {
-		while ( (elem = results[i++]) ) {
+		while ( ( elem = results[ i++ ] ) ) {
 			if ( elem === results[ i ] ) {
 				j = duplicates.push( i );
 			}
@@ -1586,17 +1723,21 @@ getText = Sizzle.getText = function( elem ) {
 		nodeType = elem.nodeType;
 
 	if ( !nodeType ) {
+
 		// If no nodeType, this is expected to be an array
-		while ( (node = elem[i++]) ) {
+		while ( ( node = elem[ i++ ] ) ) {
+
 			// Do not traverse comment nodes
 			ret += getText( node );
 		}
 	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+
 		// Use textContent for elements
 		// innerText usage removed for consistency of new lines (jQuery #11153)
 		if ( typeof elem.textContent === "string" ) {
 			return elem.textContent;
 		} else {
+
 			// Traverse its children
 			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
 				ret += getText( elem );
@@ -1605,6 +1746,7 @@ getText = Sizzle.getText = function( elem ) {
 	} else if ( nodeType === 3 || nodeType === 4 ) {
 		return elem.nodeValue;
 	}
+
 	// Do not include comment or processing instruction nodes
 
 	return ret;
@@ -1632,19 +1774,21 @@ Expr = Sizzle.selectors = {
 
 	preFilter: {
 		"ATTR": function( match ) {
-			match[1] = match[1].replace( runescape, funescape );
+			match[ 1 ] = match[ 1 ].replace( runescape, funescape );
 
 			// Move the given value to match[3] whether quoted or unquoted
-			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
+			match[ 3 ] = ( match[ 3 ] || match[ 4 ] ||
+				match[ 5 ] || "" ).replace( runescape, funescape );
 
-			if ( match[2] === "~=" ) {
-				match[3] = " " + match[3] + " ";
+			if ( match[ 2 ] === "~=" ) {
+				match[ 3 ] = " " + match[ 3 ] + " ";
 			}
 
 			return match.slice( 0, 4 );
 		},
 
 		"CHILD": function( match ) {
+
 			/* matches from matchExpr["CHILD"]
 				1 type (only|nth|...)
 				2 what (child|of-type)
@@ -1655,22 +1799,25 @@ Expr = Sizzle.selectors = {
 				7 sign of y-component
 				8 y of y-component
 			*/
-			match[1] = match[1].toLowerCase();
+			match[ 1 ] = match[ 1 ].toLowerCase();
+
+			if ( match[ 1 ].slice( 0, 3 ) === "nth" ) {
 
-			if ( match[1].slice( 0, 3 ) === "nth" ) {
 				// nth-* requires argument
-				if ( !match[3] ) {
-					Sizzle.error( match[0] );
+				if ( !match[ 3 ] ) {
+					Sizzle.error( match[ 0 ] );
 				}
 
 				// numeric x and y parameters for Expr.filter.CHILD
 				// remember that false/true cast respectively to 0/1
-				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
-				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
+				match[ 4 ] = +( match[ 4 ] ?
+					match[ 5 ] + ( match[ 6 ] || 1 ) :
+					2 * ( match[ 3 ] === "even" || match[ 3 ] === "odd" ) );
+				match[ 5 ] = +( ( match[ 7 ] + match[ 8 ] ) || match[ 3 ] === "odd" );
 
-			// other types prohibit arguments
-			} else if ( match[3] ) {
-				Sizzle.error( match[0] );
+				// other types prohibit arguments
+			} else if ( match[ 3 ] ) {
+				Sizzle.error( match[ 0 ] );
 			}
 
 			return match;
@@ -1678,26 +1825,28 @@ Expr = Sizzle.selectors = {
 
 		"PSEUDO": function( match ) {
 			var excess,
-				unquoted = !match[6] && match[2];
+				unquoted = !match[ 6 ] && match[ 2 ];
 
-			if ( matchExpr["CHILD"].test( match[0] ) ) {
+			if ( matchExpr[ "CHILD" ].test( match[ 0 ] ) ) {
 				return null;
 			}
 
 			// Accept quoted arguments as-is
-			if ( match[3] ) {
-				match[2] = match[4] || match[5] || "";
+			if ( match[ 3 ] ) {
+				match[ 2 ] = match[ 4 ] || match[ 5 ] || "";
 
 			// Strip excess characters from unquoted arguments
 			} else if ( unquoted && rpseudo.test( unquoted ) &&
+
 				// Get excess from tokenize (recursively)
-				(excess = tokenize( unquoted, true )) &&
+				( excess = tokenize( unquoted, true ) ) &&
+
 				// advance to the next closing parenthesis
-				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+				( excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length ) ) {
 
 				// excess is a negative index
-				match[0] = match[0].slice( 0, excess );
-				match[2] = unquoted.slice( 0, excess );
+				match[ 0 ] = match[ 0 ].slice( 0, excess );
+				match[ 2 ] = unquoted.slice( 0, excess );
 			}
 
 			// Return only captures needed by the pseudo filter method (type and argument)
@@ -1710,7 +1859,9 @@ Expr = Sizzle.selectors = {
 		"TAG": function( nodeNameSelector ) {
 			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
 			return nodeNameSelector === "*" ?
-				function() { return true; } :
+				function() {
+					return true;
+				} :
 				function( elem ) {
 					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
 				};
@@ -1720,10 +1871,16 @@ Expr = Sizzle.selectors = {
 			var pattern = classCache[ className + " " ];
 
 			return pattern ||
-				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
-				classCache( className, function( elem ) {
-					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
-				});
+				( pattern = new RegExp( "(^|" + whitespace +
+					")" + className + "(" + whitespace + "|$)" ) ) && classCache(
+						className, function( elem ) {
+							return pattern.test(
+								typeof elem.className === "string" && elem.className ||
+								typeof elem.getAttribute !== "undefined" &&
+									elem.getAttribute( "class" ) ||
+								""
+							);
+				} );
 		},
 
 		"ATTR": function( name, operator, check ) {
@@ -1739,6 +1896,8 @@ Expr = Sizzle.selectors = {
 
 				result += "";
 
+				/* eslint-disable max-len */
+
 				return operator === "=" ? result === check :
 					operator === "!=" ? result !== check :
 					operator === "^=" ? check && result.indexOf( check ) === 0 :
@@ -1747,10 +1906,12 @@ Expr = Sizzle.selectors = {
 					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
 					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
 					false;
+				/* eslint-enable max-len */
+
 			};
 		},
 
-		"CHILD": function( type, what, argument, first, last ) {
+		"CHILD": function( type, what, _argument, first, last ) {
 			var simple = type.slice( 0, 3 ) !== "nth",
 				forward = type.slice( -4 ) !== "last",
 				ofType = what === "of-type";
@@ -1762,7 +1923,7 @@ Expr = Sizzle.selectors = {
 					return !!elem.parentNode;
 				} :
 
-				function( elem, context, xml ) {
+				function( elem, _context, xml ) {
 					var cache, uniqueCache, outerCache, node, nodeIndex, start,
 						dir = simple !== forward ? "nextSibling" : "previousSibling",
 						parent = elem.parentNode,
@@ -1776,7 +1937,7 @@ Expr = Sizzle.selectors = {
 						if ( simple ) {
 							while ( dir ) {
 								node = elem;
-								while ( (node = node[ dir ]) ) {
+								while ( ( node = node[ dir ] ) ) {
 									if ( ofType ?
 										node.nodeName.toLowerCase() === name :
 										node.nodeType === 1 ) {
@@ -1784,6 +1945,7 @@ Expr = Sizzle.selectors = {
 										return false;
 									}
 								}
+
 								// Reverse direction for :only-* (if we haven't yet done so)
 								start = dir = type === "only" && !start && "nextSibling";
 							}
@@ -1799,22 +1961,22 @@ Expr = Sizzle.selectors = {
 
 							// ...in a gzip-friendly way
 							node = parent;
-							outerCache = node[ expando ] || (node[ expando ] = {});
+							outerCache = node[ expando ] || ( node[ expando ] = {} );
 
 							// Support: IE <9 only
 							// Defend against cloned attroperties (jQuery gh-1709)
 							uniqueCache = outerCache[ node.uniqueID ] ||
-								(outerCache[ node.uniqueID ] = {});
+								( outerCache[ node.uniqueID ] = {} );
 
 							cache = uniqueCache[ type ] || [];
 							nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
 							diff = nodeIndex && cache[ 2 ];
 							node = nodeIndex && parent.childNodes[ nodeIndex ];
 
-							while ( (node = ++nodeIndex && node && node[ dir ] ||
+							while ( ( node = ++nodeIndex && node && node[ dir ] ||
 
 								// Fallback to seeking `elem` from the start
-								(diff = nodeIndex = 0) || start.pop()) ) {
+								( diff = nodeIndex = 0 ) || start.pop() ) ) {
 
 								// When found, cache indexes on `parent` and break
 								if ( node.nodeType === 1 && ++diff && node === elem ) {
@@ -1824,16 +1986,18 @@ Expr = Sizzle.selectors = {
 							}
 
 						} else {
+
 							// Use previously-cached element index if available
 							if ( useCache ) {
+
 								// ...in a gzip-friendly way
 								node = elem;
-								outerCache = node[ expando ] || (node[ expando ] = {});
+								outerCache = node[ expando ] || ( node[ expando ] = {} );
 
 								// Support: IE <9 only
 								// Defend against cloned attroperties (jQuery gh-1709)
 								uniqueCache = outerCache[ node.uniqueID ] ||
-									(outerCache[ node.uniqueID ] = {});
+									( outerCache[ node.uniqueID ] = {} );
 
 								cache = uniqueCache[ type ] || [];
 								nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
@@ -1843,9 +2007,10 @@ Expr = Sizzle.selectors = {
 							// xml :nth-child(...)
 							// or :nth-last-child(...) or :nth(-last)?-of-type(...)
 							if ( diff === false ) {
+
 								// Use the same loop as above to seek `elem` from the start
-								while ( (node = ++nodeIndex && node && node[ dir ] ||
-									(diff = nodeIndex = 0) || start.pop()) ) {
+								while ( ( node = ++nodeIndex && node && node[ dir ] ||
+									( diff = nodeIndex = 0 ) || start.pop() ) ) {
 
 									if ( ( ofType ?
 										node.nodeName.toLowerCase() === name :
@@ -1854,12 +2019,13 @@ Expr = Sizzle.selectors = {
 
 										// Cache the index of each encountered element
 										if ( useCache ) {
-											outerCache = node[ expando ] || (node[ expando ] = {});
+											outerCache = node[ expando ] ||
+												( node[ expando ] = {} );
 
 											// Support: IE <9 only
 											// Defend against cloned attroperties (jQuery gh-1709)
 											uniqueCache = outerCache[ node.uniqueID ] ||
-												(outerCache[ node.uniqueID ] = {});
+												( outerCache[ node.uniqueID ] = {} );
 
 											uniqueCache[ type ] = [ dirruns, diff ];
 										}
@@ -1880,6 +2046,7 @@ Expr = Sizzle.selectors = {
 		},
 
 		"PSEUDO": function( pseudo, argument ) {
+
 			// pseudo-class names are case-insensitive
 			// http://www.w3.org/TR/selectors/#pseudo-classes
 			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
@@ -1899,15 +2066,15 @@ Expr = Sizzle.selectors = {
 			if ( fn.length > 1 ) {
 				args = [ pseudo, pseudo, "", argument ];
 				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
-					markFunction(function( seed, matches ) {
+					markFunction( function( seed, matches ) {
 						var idx,
 							matched = fn( seed, argument ),
 							i = matched.length;
 						while ( i-- ) {
-							idx = indexOf( seed, matched[i] );
-							seed[ idx ] = !( matches[ idx ] = matched[i] );
+							idx = indexOf( seed, matched[ i ] );
+							seed[ idx ] = !( matches[ idx ] = matched[ i ] );
 						}
-					}) :
+					} ) :
 					function( elem ) {
 						return fn( elem, 0, args );
 					};
@@ -1918,8 +2085,10 @@ Expr = Sizzle.selectors = {
 	},
 
 	pseudos: {
+
 		// Potentially complex pseudos
-		"not": markFunction(function( selector ) {
+		"not": markFunction( function( selector ) {
+
 			// Trim the selector passed to compile
 			// to avoid treating leading and trailing
 			// spaces as combinators
@@ -1928,39 +2097,40 @@ Expr = Sizzle.selectors = {
 				matcher = compile( selector.replace( rtrim, "$1" ) );
 
 			return matcher[ expando ] ?
-				markFunction(function( seed, matches, context, xml ) {
+				markFunction( function( seed, matches, _context, xml ) {
 					var elem,
 						unmatched = matcher( seed, null, xml, [] ),
 						i = seed.length;
 
 					// Match elements unmatched by `matcher`
 					while ( i-- ) {
-						if ( (elem = unmatched[i]) ) {
-							seed[i] = !(matches[i] = elem);
+						if ( ( elem = unmatched[ i ] ) ) {
+							seed[ i ] = !( matches[ i ] = elem );
 						}
 					}
-				}) :
-				function( elem, context, xml ) {
-					input[0] = elem;
+				} ) :
+				function( elem, _context, xml ) {
+					input[ 0 ] = elem;
 					matcher( input, null, xml, results );
+
 					// Don't keep the element (issue #299)
-					input[0] = null;
+					input[ 0 ] = null;
 					return !results.pop();
 				};
-		}),
+		} ),
 
-		"has": markFunction(function( selector ) {
+		"has": markFunction( function( selector ) {
 			return function( elem ) {
 				return Sizzle( selector, elem ).length > 0;
 			};
-		}),
+		} ),
 
-		"contains": markFunction(function( text ) {
+		"contains": markFunction( function( text ) {
 			text = text.replace( runescape, funescape );
 			return function( elem ) {
-				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
+				return ( elem.textContent || getText( elem ) ).indexOf( text ) > -1;
 			};
-		}),
+		} ),
 
 		// "Whether an element is represented by a :lang() selector
 		// is based solely on the element's language value
@@ -1970,25 +2140,26 @@ Expr = Sizzle.selectors = {
 		// The identifier C does not have to be a valid language name."
 		// http://www.w3.org/TR/selectors/#lang-pseudo
 		"lang": markFunction( function( lang ) {
+
 			// lang value must be a valid identifier
-			if ( !ridentifier.test(lang || "") ) {
+			if ( !ridentifier.test( lang || "" ) ) {
 				Sizzle.error( "unsupported lang: " + lang );
 			}
 			lang = lang.replace( runescape, funescape ).toLowerCase();
 			return function( elem ) {
 				var elemLang;
 				do {
-					if ( (elemLang = documentIsHTML ?
+					if ( ( elemLang = documentIsHTML ?
 						elem.lang :
-						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
+						elem.getAttribute( "xml:lang" ) || elem.getAttribute( "lang" ) ) ) {
 
 						elemLang = elemLang.toLowerCase();
 						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
 					}
-				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
+				} while ( ( elem = elem.parentNode ) && elem.nodeType === 1 );
 				return false;
 			};
-		}),
+		} ),
 
 		// Miscellaneous
 		"target": function( elem ) {
@@ -2001,7 +2172,9 @@ Expr = Sizzle.selectors = {
 		},
 
 		"focus": function( elem ) {
-			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
+			return elem === document.activeElement &&
+				( !document.hasFocus || document.hasFocus() ) &&
+				!!( elem.type || elem.href || ~elem.tabIndex );
 		},
 
 		// Boolean properties
@@ -2009,16 +2182,20 @@ Expr = Sizzle.selectors = {
 		"disabled": createDisabledPseudo( true ),
 
 		"checked": function( elem ) {
+
 			// In CSS3, :checked should return both checked and selected elements
 			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
 			var nodeName = elem.nodeName.toLowerCase();
-			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
+			return ( nodeName === "input" && !!elem.checked ) ||
+				( nodeName === "option" && !!elem.selected );
 		},
 
 		"selected": function( elem ) {
+
 			// Accessing this property makes selected-by-default
 			// options in Safari work properly
 			if ( elem.parentNode ) {
+				// eslint-disable-next-line no-unused-expressions
 				elem.parentNode.selectedIndex;
 			}
 
@@ -2027,6 +2204,7 @@ Expr = Sizzle.selectors = {
 
 		// Contents
 		"empty": function( elem ) {
+
 			// http://www.w3.org/TR/selectors/#empty-pseudo
 			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
 			//   but not by others (comment: 8; processing instruction: 7; etc.)
@@ -2040,7 +2218,7 @@ Expr = Sizzle.selectors = {
 		},
 
 		"parent": function( elem ) {
-			return !Expr.pseudos["empty"]( elem );
+			return !Expr.pseudos[ "empty" ]( elem );
 		},
 
 		// Element/input types
@@ -2064,57 +2242,62 @@ Expr = Sizzle.selectors = {
 
 				// Support: IE<8
 				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
-				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
+				( ( attr = elem.getAttribute( "type" ) ) == null ||
+					attr.toLowerCase() === "text" );
 		},
 
 		// Position-in-collection
-		"first": createPositionalPseudo(function() {
+		"first": createPositionalPseudo( function() {
 			return [ 0 ];
-		}),
+		} ),
 
-		"last": createPositionalPseudo(function( matchIndexes, length ) {
+		"last": createPositionalPseudo( function( _matchIndexes, length ) {
 			return [ length - 1 ];
-		}),
+		} ),
 
-		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
+		"eq": createPositionalPseudo( function( _matchIndexes, length, argument ) {
 			return [ argument < 0 ? argument + length : argument ];
-		}),
+		} ),
 
-		"even": createPositionalPseudo(function( matchIndexes, length ) {
+		"even": createPositionalPseudo( function( matchIndexes, length ) {
 			var i = 0;
 			for ( ; i < length; i += 2 ) {
 				matchIndexes.push( i );
 			}
 			return matchIndexes;
-		}),
+		} ),
 
-		"odd": createPositionalPseudo(function( matchIndexes, length ) {
+		"odd": createPositionalPseudo( function( matchIndexes, length ) {
 			var i = 1;
 			for ( ; i < length; i += 2 ) {
 				matchIndexes.push( i );
 			}
 			return matchIndexes;
-		}),
+		} ),
 
-		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
-			var i = argument < 0 ? argument + length : argument;
+		"lt": createPositionalPseudo( function( matchIndexes, length, argument ) {
+			var i = argument < 0 ?
+				argument + length :
+				argument > length ?
+					length :
+					argument;
 			for ( ; --i >= 0; ) {
 				matchIndexes.push( i );
 			}
 			return matchIndexes;
-		}),
+		} ),
 
-		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+		"gt": createPositionalPseudo( function( matchIndexes, length, argument ) {
 			var i = argument < 0 ? argument + length : argument;
 			for ( ; ++i < length; ) {
 				matchIndexes.push( i );
 			}
 			return matchIndexes;
-		})
+		} )
 	}
 };
 
-Expr.pseudos["nth"] = Expr.pseudos["eq"];
+Expr.pseudos[ "nth" ] = Expr.pseudos[ "eq" ];
 
 // Add button/input type pseudos
 for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
@@ -2145,37 +2328,39 @@ tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
 	while ( soFar ) {
 
 		// Comma and first run
-		if ( !matched || (match = rcomma.exec( soFar )) ) {
+		if ( !matched || ( match = rcomma.exec( soFar ) ) ) {
 			if ( match ) {
+
 				// Don't consume trailing commas as valid
-				soFar = soFar.slice( match[0].length ) || soFar;
+				soFar = soFar.slice( match[ 0 ].length ) || soFar;
 			}
-			groups.push( (tokens = []) );
+			groups.push( ( tokens = [] ) );
 		}
 
 		matched = false;
 
 		// Combinators
-		if ( (match = rcombinators.exec( soFar )) ) {
+		if ( ( match = rcombinators.exec( soFar ) ) ) {
 			matched = match.shift();
-			tokens.push({
+			tokens.push( {
 				value: matched,
+
 				// Cast descendant combinators to space
-				type: match[0].replace( rtrim, " " )
-			});
+				type: match[ 0 ].replace( rtrim, " " )
+			} );
 			soFar = soFar.slice( matched.length );
 		}
 
 		// Filters
 		for ( type in Expr.filter ) {
-			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
-				(match = preFilters[ type ]( match ))) ) {
+			if ( ( match = matchExpr[ type ].exec( soFar ) ) && ( !preFilters[ type ] ||
+				( match = preFilters[ type ]( match ) ) ) ) {
 				matched = match.shift();
-				tokens.push({
+				tokens.push( {
 					value: matched,
 					type: type,
 					matches: match
-				});
+				} );
 				soFar = soFar.slice( matched.length );
 			}
 		}
@@ -2192,6 +2377,7 @@ tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
 		soFar.length :
 		soFar ?
 			Sizzle.error( selector ) :
+
 			// Cache the tokens
 			tokenCache( selector, groups ).slice( 0 );
 };
@@ -2201,7 +2387,7 @@ function toSelector( tokens ) {
 		len = tokens.length,
 		selector = "";
 	for ( ; i < len; i++ ) {
-		selector += tokens[i].value;
+		selector += tokens[ i ].value;
 	}
 	return selector;
 }
@@ -2214,9 +2400,10 @@ function addCombinator( matcher, combinator, base ) {
 		doneName = done++;
 
 	return combinator.first ?
+
 		// Check against closest ancestor/preceding element
 		function( elem, context, xml ) {
-			while ( (elem = elem[ dir ]) ) {
+			while ( ( elem = elem[ dir ] ) ) {
 				if ( elem.nodeType === 1 || checkNonElements ) {
 					return matcher( elem, context, xml );
 				}
@@ -2231,7 +2418,7 @@ function addCombinator( matcher, combinator, base ) {
 
 			// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
 			if ( xml ) {
-				while ( (elem = elem[ dir ]) ) {
+				while ( ( elem = elem[ dir ] ) ) {
 					if ( elem.nodeType === 1 || checkNonElements ) {
 						if ( matcher( elem, context, xml ) ) {
 							return true;
@@ -2239,27 +2426,29 @@ function addCombinator( matcher, combinator, base ) {
 					}
 				}
 			} else {
-				while ( (elem = elem[ dir ]) ) {
+				while ( ( elem = elem[ dir ] ) ) {
 					if ( elem.nodeType === 1 || checkNonElements ) {
-						outerCache = elem[ expando ] || (elem[ expando ] = {});
+						outerCache = elem[ expando ] || ( elem[ expando ] = {} );
 
 						// Support: IE <9 only
 						// Defend against cloned attroperties (jQuery gh-1709)
-						uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
+						uniqueCache = outerCache[ elem.uniqueID ] ||
+							( outerCache[ elem.uniqueID ] = {} );
 
 						if ( skip && skip === elem.nodeName.toLowerCase() ) {
 							elem = elem[ dir ] || elem;
-						} else if ( (oldCache = uniqueCache[ key ]) &&
+						} else if ( ( oldCache = uniqueCache[ key ] ) &&
 							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
 
 							// Assign to newCache so results back-propagate to previous elements
-							return (newCache[ 2 ] = oldCache[ 2 ]);
+							return ( newCache[ 2 ] = oldCache[ 2 ] );
 						} else {
+
 							// Reuse newcache so results back-propagate to previous elements
 							uniqueCache[ key ] = newCache;
 
 							// A match means we're done; a fail means we have to keep checking
-							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
+							if ( ( newCache[ 2 ] = matcher( elem, context, xml ) ) ) {
 								return true;
 							}
 						}
@@ -2275,20 +2464,20 @@ function elementMatcher( matchers ) {
 		function( elem, context, xml ) {
 			var i = matchers.length;
 			while ( i-- ) {
-				if ( !matchers[i]( elem, context, xml ) ) {
+				if ( !matchers[ i ]( elem, context, xml ) ) {
 					return false;
 				}
 			}
 			return true;
 		} :
-		matchers[0];
+		matchers[ 0 ];
 }
 
 function multipleContexts( selector, contexts, results ) {
 	var i = 0,
 		len = contexts.length;
 	for ( ; i < len; i++ ) {
-		Sizzle( selector, contexts[i], results );
+		Sizzle( selector, contexts[ i ], results );
 	}
 	return results;
 }
@@ -2301,7 +2490,7 @@ function condense( unmatched, map, filter, context, xml ) {
 		mapped = map != null;
 
 	for ( ; i < len; i++ ) {
-		if ( (elem = unmatched[i]) ) {
+		if ( ( elem = unmatched[ i ] ) ) {
 			if ( !filter || filter( elem, context, xml ) ) {
 				newUnmatched.push( elem );
 				if ( mapped ) {
@@ -2321,14 +2510,18 @@ function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postS
 	if ( postFinder && !postFinder[ expando ] ) {
 		postFinder = setMatcher( postFinder, postSelector );
 	}
-	return markFunction(function( seed, results, context, xml ) {
+	return markFunction( function( seed, results, context, xml ) {
 		var temp, i, elem,
 			preMap = [],
 			postMap = [],
 			preexisting = results.length,
 
 			// Get initial elements from seed or context
-			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
+			elems = seed || multipleContexts(
+				selector || "*",
+				context.nodeType ? [ context ] : context,
+				[]
+			),
 
 			// Prefilter to get matcher input, preserving a map for seed-results synchronization
 			matcherIn = preFilter && ( seed || !selector ) ?
@@ -2336,6 +2529,7 @@ function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postS
 				elems,
 
 			matcherOut = matcher ?
+
 				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
 				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
 
@@ -2359,8 +2553,8 @@ function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postS
 			// Un-match failing elements by moving them back to matcherIn
 			i = temp.length;
 			while ( i-- ) {
-				if ( (elem = temp[i]) ) {
-					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
+				if ( ( elem = temp[ i ] ) ) {
+					matcherOut[ postMap[ i ] ] = !( matcherIn[ postMap[ i ] ] = elem );
 				}
 			}
 		}
@@ -2368,25 +2562,27 @@ function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postS
 		if ( seed ) {
 			if ( postFinder || preFilter ) {
 				if ( postFinder ) {
+
 					// Get the final matcherOut by condensing this intermediate into postFinder contexts
 					temp = [];
 					i = matcherOut.length;
 					while ( i-- ) {
-						if ( (elem = matcherOut[i]) ) {
+						if ( ( elem = matcherOut[ i ] ) ) {
+
 							// Restore matcherIn since elem is not yet a final match
-							temp.push( (matcherIn[i] = elem) );
+							temp.push( ( matcherIn[ i ] = elem ) );
 						}
 					}
-					postFinder( null, (matcherOut = []), temp, xml );
+					postFinder( null, ( matcherOut = [] ), temp, xml );
 				}
 
 				// Move matched elements from seed to results to keep them synchronized
 				i = matcherOut.length;
 				while ( i-- ) {
-					if ( (elem = matcherOut[i]) &&
-						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
+					if ( ( elem = matcherOut[ i ] ) &&
+						( temp = postFinder ? indexOf( seed, elem ) : preMap[ i ] ) > -1 ) {
 
-						seed[temp] = !(results[temp] = elem);
+						seed[ temp ] = !( results[ temp ] = elem );
 					}
 				}
 			}
@@ -2404,14 +2600,14 @@ function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postS
 				push.apply( results, matcherOut );
 			}
 		}
-	});
+	} );
 }
 
 function matcherFromTokens( tokens ) {
 	var checkContext, matcher, j,
 		len = tokens.length,
-		leadingRelative = Expr.relative[ tokens[0].type ],
-		implicitRelative = leadingRelative || Expr.relative[" "],
+		leadingRelative = Expr.relative[ tokens[ 0 ].type ],
+		implicitRelative = leadingRelative || Expr.relative[ " " ],
 		i = leadingRelative ? 1 : 0,
 
 		// The foundational matcher ensures that elements are reachable from top-level context(s)
@@ -2423,38 +2619,43 @@ function matcherFromTokens( tokens ) {
 		}, implicitRelative, true ),
 		matchers = [ function( elem, context, xml ) {
 			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
-				(checkContext = context).nodeType ?
+				( checkContext = context ).nodeType ?
 					matchContext( elem, context, xml ) :
 					matchAnyContext( elem, context, xml ) );
+
 			// Avoid hanging onto element (issue #299)
 			checkContext = null;
 			return ret;
 		} ];
 
 	for ( ; i < len; i++ ) {
-		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
-			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
+		if ( ( matcher = Expr.relative[ tokens[ i ].type ] ) ) {
+			matchers = [ addCombinator( elementMatcher( matchers ), matcher ) ];
 		} else {
-			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
+			matcher = Expr.filter[ tokens[ i ].type ].apply( null, tokens[ i ].matches );
 
 			// Return special upon seeing a positional matcher
 			if ( matcher[ expando ] ) {
+
 				// Find the next relative operator (if any) for proper handling
 				j = ++i;
 				for ( ; j < len; j++ ) {
-					if ( Expr.relative[ tokens[j].type ] ) {
+					if ( Expr.relative[ tokens[ j ].type ] ) {
 						break;
 					}
 				}
 				return setMatcher(
 					i > 1 && elementMatcher( matchers ),
 					i > 1 && toSelector(
-						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
-						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
+
+					// If the preceding token was a descendant combinator, insert an implicit any-element `*`
+					tokens
+						.slice( 0, i - 1 )
+						.concat( { value: tokens[ i - 2 ].type === " " ? "*" : "" } )
 					).replace( rtrim, "$1" ),
 					matcher,
 					i < j && matcherFromTokens( tokens.slice( i, j ) ),
-					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
+					j < len && matcherFromTokens( ( tokens = tokens.slice( j ) ) ),
 					j < len && toSelector( tokens )
 				);
 			}
@@ -2475,28 +2676,40 @@ function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
 				unmatched = seed && [],
 				setMatched = [],
 				contextBackup = outermostContext,
+
 				// We must always have either seed elements or outermost context
-				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
+				elems = seed || byElement && Expr.find[ "TAG" ]( "*", outermost ),
+
 				// Use integer dirruns iff this is the outermost matcher
-				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
+				dirrunsUnique = ( dirruns += contextBackup == null ? 1 : Math.random() || 0.1 ),
 				len = elems.length;
 
 			if ( outermost ) {
-				outermostContext = context === document || context || outermost;
+
+				// Support: IE 11+, Edge 17 - 18+
+				// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+				// two documents; shallow comparisons work.
+				// eslint-disable-next-line eqeqeq
+				outermostContext = context == document || context || outermost;
 			}
 
 			// Add elements passing elementMatchers directly to results
 			// Support: IE<9, Safari
 			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
-			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
+			for ( ; i !== len && ( elem = elems[ i ] ) != null; i++ ) {
 				if ( byElement && elem ) {
 					j = 0;
-					if ( !context && elem.ownerDocument !== document ) {
+
+					// Support: IE 11+, Edge 17 - 18+
+					// IE/Edge sometimes throw a "Permission denied" error when strict-comparing
+					// two documents; shallow comparisons work.
+					// eslint-disable-next-line eqeqeq
+					if ( !context && elem.ownerDocument != document ) {
 						setDocument( elem );
 						xml = !documentIsHTML;
 					}
-					while ( (matcher = elementMatchers[j++]) ) {
-						if ( matcher( elem, context || document, xml) ) {
+					while ( ( matcher = elementMatchers[ j++ ] ) ) {
+						if ( matcher( elem, context || document, xml ) ) {
 							results.push( elem );
 							break;
 						}
@@ -2508,8 +2721,9 @@ function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
 
 				// Track unmatched elements for set filters
 				if ( bySet ) {
+
 					// They will have gone through all possible matchers
-					if ( (elem = !matcher && elem) ) {
+					if ( ( elem = !matcher && elem ) ) {
 						matchedCount--;
 					}
 
@@ -2533,16 +2747,17 @@ function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
 			// numerically zero.
 			if ( bySet && i !== matchedCount ) {
 				j = 0;
-				while ( (matcher = setMatchers[j++]) ) {
+				while ( ( matcher = setMatchers[ j++ ] ) ) {
 					matcher( unmatched, setMatched, context, xml );
 				}
 
 				if ( seed ) {
+
 					// Reintegrate element matches to eliminate the need for sorting
 					if ( matchedCount > 0 ) {
 						while ( i-- ) {
-							if ( !(unmatched[i] || setMatched[i]) ) {
-								setMatched[i] = pop.call( results );
+							if ( !( unmatched[ i ] || setMatched[ i ] ) ) {
+								setMatched[ i ] = pop.call( results );
 							}
 						}
 					}
@@ -2583,13 +2798,14 @@ compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
 		cached = compilerCache[ selector + " " ];
 
 	if ( !cached ) {
+
 		// Generate a function of recursive functions that can be used to check each element
 		if ( !match ) {
 			match = tokenize( selector );
 		}
 		i = match.length;
 		while ( i-- ) {
-			cached = matcherFromTokens( match[i] );
+			cached = matcherFromTokens( match[ i ] );
 			if ( cached[ expando ] ) {
 				setMatchers.push( cached );
 			} else {
@@ -2598,7 +2814,10 @@ compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
 		}
 
 		// Cache the compiled function
-		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
+		cached = compilerCache(
+			selector,
+			matcherFromGroupMatchers( elementMatchers, setMatchers )
+		);
 
 		// Save selector and tokenization
 		cached.selector = selector;
@@ -2618,7 +2837,7 @@ compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
 select = Sizzle.select = function( selector, context, results, seed ) {
 	var i, tokens, token, type, find,
 		compiled = typeof selector === "function" && selector,
-		match = !seed && tokenize( (selector = compiled.selector || selector) );
+		match = !seed && tokenize( ( selector = compiled.selector || selector ) );
 
 	results = results || [];
 
@@ -2627,11 +2846,12 @@ select = Sizzle.select = function( selector, context, results, seed ) {
 	if ( match.length === 1 ) {
 
 		// Reduce context if the leading compound selector is an ID
-		tokens = match[0] = match[0].slice( 0 );
-		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
-				context.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {
+		tokens = match[ 0 ] = match[ 0 ].slice( 0 );
+		if ( tokens.length > 2 && ( token = tokens[ 0 ] ).type === "ID" &&
+			context.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[ 1 ].type ] ) {
 
-			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
+			context = ( Expr.find[ "ID" ]( token.matches[ 0 ]
+				.replace( runescape, funescape ), context ) || [] )[ 0 ];
 			if ( !context ) {
 				return results;
 
@@ -2644,20 +2864,22 @@ select = Sizzle.select = function( selector, context, results, seed ) {
 		}
 
 		// Fetch a seed set for right-to-left matching
-		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
+		i = matchExpr[ "needsContext" ].test( selector ) ? 0 : tokens.length;
 		while ( i-- ) {
-			token = tokens[i];
+			token = tokens[ i ];
 
 			// Abort if we hit a combinator
-			if ( Expr.relative[ (type = token.type) ] ) {
+			if ( Expr.relative[ ( type = token.type ) ] ) {
 				break;
 			}
-			if ( (find = Expr.find[ type ]) ) {
+			if ( ( find = Expr.find[ type ] ) ) {
+
 				// Search, expanding context for leading sibling combinators
-				if ( (seed = find(
-					token.matches[0].replace( runescape, funescape ),
-					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
-				)) ) {
+				if ( ( seed = find(
+					token.matches[ 0 ].replace( runescape, funescape ),
+					rsibling.test( tokens[ 0 ].type ) && testContext( context.parentNode ) ||
+						context
+				) ) ) {
 
 					// If seed is empty or no tokens remain, we can return early
 					tokens.splice( i, 1 );
@@ -2688,7 +2910,7 @@ select = Sizzle.select = function( selector, context, results, seed ) {
 // One-time assignments
 
 // Sort stability
-support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
+support.sortStable = expando.split( "" ).sort( sortOrder ).join( "" ) === expando;
 
 // Support: Chrome 14-35+
 // Always assume duplicates if they aren't passed to the comparison function
@@ -2699,58 +2921,59 @@ setDocument();
 
 // Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
 // Detached nodes confoundingly follow *each other*
-support.sortDetached = assert(function( el ) {
+support.sortDetached = assert( function( el ) {
+
 	// Should return 1, but returns 4 (following)
-	return el.compareDocumentPosition( document.createElement("fieldset") ) & 1;
-});
+	return el.compareDocumentPosition( document.createElement( "fieldset" ) ) & 1;
+} );
 
 // Support: IE<8
 // Prevent attribute/property "interpolation"
 // https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
-if ( !assert(function( el ) {
+if ( !assert( function( el ) {
 	el.innerHTML = "<a href='#'></a>";
-	return el.firstChild.getAttribute("href") === "#" ;
-}) ) {
+	return el.firstChild.getAttribute( "href" ) === "#";
+} ) ) {
 	addHandle( "type|href|height|width", function( elem, name, isXML ) {
 		if ( !isXML ) {
 			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
 		}
-	});
+	} );
 }
 
 // Support: IE<9
 // Use defaultValue in place of getAttribute("value")
-if ( !support.attributes || !assert(function( el ) {
+if ( !support.attributes || !assert( function( el ) {
 	el.innerHTML = "<input/>";
 	el.firstChild.setAttribute( "value", "" );
 	return el.firstChild.getAttribute( "value" ) === "";
-}) ) {
-	addHandle( "value", function( elem, name, isXML ) {
+} ) ) {
+	addHandle( "value", function( elem, _name, isXML ) {
 		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
 			return elem.defaultValue;
 		}
-	});
+	} );
 }
 
 // Support: IE<9
 // Use getAttributeNode to fetch booleans when getAttribute lies
-if ( !assert(function( el ) {
-	return el.getAttribute("disabled") == null;
-}) ) {
+if ( !assert( function( el ) {
+	return el.getAttribute( "disabled" ) == null;
+} ) ) {
 	addHandle( booleans, function( elem, name, isXML ) {
 		var val;
 		if ( !isXML ) {
 			return elem[ name ] === true ? name.toLowerCase() :
-					(val = elem.getAttributeNode( name )) && val.specified ?
+				( val = elem.getAttributeNode( name ) ) && val.specified ?
 					val.value :
-				null;
+					null;
 		}
-	});
+	} );
 }
 
 return Sizzle;
 
-})( window );
+} )( window );
 
 
 
@@ -2803,9 +3026,9 @@ var rneedsContext = jQuery.expr.match.needsContext;
 
 function nodeName( elem, name ) {
 
-  return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
+	return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
 
-};
+}
 var rsingleTag = ( /^<([a-z][^\/\0>:\x20\t\r\n\f]*)[\x20\t\r\n\f]*\/?>(?:<\/\1>|)$/i );
 
 
@@ -3119,7 +3342,7 @@ jQuery.each( {
 	parents: function( elem ) {
 		return dir( elem, "parentNode" );
 	},
-	parentsUntil: function( elem, i, until ) {
+	parentsUntil: function( elem, _i, until ) {
 		return dir( elem, "parentNode", until );
 	},
 	next: function( elem ) {
@@ -3134,10 +3357,10 @@ jQuery.each( {
 	prevAll: function( elem ) {
 		return dir( elem, "previousSibling" );
 	},
-	nextUntil: function( elem, i, until ) {
+	nextUntil: function( elem, _i, until ) {
 		return dir( elem, "nextSibling", until );
 	},
-	prevUntil: function( elem, i, until ) {
+	prevUntil: function( elem, _i, until ) {
 		return dir( elem, "previousSibling", until );
 	},
 	siblings: function( elem ) {
@@ -3147,18 +3370,24 @@ jQuery.each( {
 		return siblings( elem.firstChild );
 	},
 	contents: function( elem ) {
-        if ( nodeName( elem, "iframe" ) ) {
-            return elem.contentDocument;
-        }
+		if ( elem.contentDocument != null &&
 
-        // Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
-        // Treat the template element as a regular one in browsers that
-        // don't support it.
-        if ( nodeName( elem, "template" ) ) {
-            elem = elem.content || elem;
-        }
+			// Support: IE 11+
+			// <object> elements with no `data` attribute has an object
+			// `contentDocument` with a `null` prototype.
+			getProto( elem.contentDocument ) ) {
+
+			return elem.contentDocument;
+		}
 
-        return jQuery.merge( [], elem.childNodes );
+		// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
+		// Treat the template element as a regular one in browsers that
+		// don't support it.
+		if ( nodeName( elem, "template" ) ) {
+			elem = elem.content || elem;
+		}
+
+		return jQuery.merge( [], elem.childNodes );
 	}
 }, function( name, fn ) {
 	jQuery.fn[ name ] = function( until, selector ) {
@@ -3490,7 +3719,7 @@ jQuery.extend( {
 					var fns = arguments;
 
 					return jQuery.Deferred( function( newDefer ) {
-						jQuery.each( tuples, function( i, tuple ) {
+						jQuery.each( tuples, function( _i, tuple ) {
 
 							// Map tuples (progress, done, fail) to arguments (done, fail, progress)
 							var fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
@@ -3770,8 +3999,8 @@ jQuery.extend( {
 			resolveContexts = Array( i ),
 			resolveValues = slice.call( arguments ),
 
-			// the master Deferred
-			master = jQuery.Deferred(),
+			// the primary Deferred
+			primary = jQuery.Deferred(),
 
 			// subordinate callback factory
 			updateFunc = function( i ) {
@@ -3779,30 +4008,30 @@ jQuery.extend( {
 					resolveContexts[ i ] = this;
 					resolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
 					if ( !( --remaining ) ) {
-						master.resolveWith( resolveContexts, resolveValues );
+						primary.resolveWith( resolveContexts, resolveValues );
 					}
 				};
 			};
 
 		// Single- and empty arguments are adopted like Promise.resolve
 		if ( remaining <= 1 ) {
-			adoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,
+			adoptValue( singleValue, primary.done( updateFunc( i ) ).resolve, primary.reject,
 				!remaining );
 
 			// Use .then() to unwrap secondary thenables (cf. gh-3000)
-			if ( master.state() === "pending" ||
+			if ( primary.state() === "pending" ||
 				isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
 
-				return master.then();
+				return primary.then();
 			}
 		}
 
 		// Multiple arguments are aggregated like Promise.all array elements
 		while ( i-- ) {
-			adoptValue( resolveValues[ i ], updateFunc( i ), master.reject );
+			adoptValue( resolveValues[ i ], updateFunc( i ), primary.reject );
 		}
 
-		return master.promise();
+		return primary.promise();
 	}
 } );
 
@@ -3943,7 +4172,7 @@ var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
 			// ...except when executing function values
 			} else {
 				bulk = fn;
-				fn = function( elem, key, value ) {
+				fn = function( elem, _key, value ) {
 					return bulk.call( jQuery( elem ), value );
 				};
 			}
@@ -3953,8 +4182,8 @@ var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
 			for ( ; i < len; i++ ) {
 				fn(
 					elems[ i ], key, raw ?
-					value :
-					value.call( elems[ i ], i, fn( elems[ i ], key ) )
+						value :
+						value.call( elems[ i ], i, fn( elems[ i ], key ) )
 				);
 			}
 		}
@@ -3978,7 +4207,7 @@ var rmsPrefix = /^-ms-/,
 	rdashAlpha = /-([a-z])/g;
 
 // Used by camelCase as callback to replace()
-function fcamelCase( all, letter ) {
+function fcamelCase( _all, letter ) {
 	return letter.toUpperCase();
 }
 
@@ -4467,6 +4696,26 @@ var rcssNum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" );
 
 var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
 
+var documentElement = document.documentElement;
+
+
+
+	var isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem );
+		},
+		composed = { composed: true };
+
+	// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only
+	// Check attachment across shadow DOM boundaries when possible (gh-3504)
+	// Support: iOS 10.0-10.2 only
+	// Early iOS 10 versions support `attachShadow` but not `getRootNode`,
+	// leading to errors. We need to check for `getRootNode`.
+	if ( documentElement.getRootNode ) {
+		isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem ) ||
+				elem.getRootNode( composed ) === elem.ownerDocument;
+		};
+	}
 var isHiddenWithinTree = function( elem, el ) {
 
 		// isHiddenWithinTree might be called from jQuery#filter function;
@@ -4481,32 +4730,11 @@ var isHiddenWithinTree = function( elem, el ) {
 			// Support: Firefox <=43 - 45
 			// Disconnected elements can have computed display: none, so first confirm that elem is
 			// in the document.
-			jQuery.contains( elem.ownerDocument, elem ) &&
+			isAttached( elem ) &&
 
 			jQuery.css( elem, "display" ) === "none";
 	};
 
-var swap = function( elem, options, callback, args ) {
-	var ret, name,
-		old = {};
-
-	// Remember the old values, and insert the new ones
-	for ( name in options ) {
-		old[ name ] = elem.style[ name ];
-		elem.style[ name ] = options[ name ];
-	}
-
-	ret = callback.apply( elem, args || [] );
-
-	// Revert the old values
-	for ( name in options ) {
-		elem.style[ name ] = old[ name ];
-	}
-
-	return ret;
-};
-
-
 
 
 function adjustCSS( elem, prop, valueParts, tween ) {
@@ -4523,7 +4751,8 @@ function adjustCSS( elem, prop, valueParts, tween ) {
 		unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
 
 		// Starting value computation is required for potential unit mismatches
-		initialInUnit = ( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
+		initialInUnit = elem.nodeType &&
+			( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
 			rcssNum.exec( jQuery.css( elem, prop ) );
 
 	if ( initialInUnit && initialInUnit[ 3 ] !== unit ) {
@@ -4670,17 +4899,46 @@ jQuery.fn.extend( {
 } );
 var rcheckableType = ( /^(?:checkbox|radio)$/i );
 
-var rtagName = ( /<([a-z][^\/\0>\x20\t\r\n\f]+)/i );
+var rtagName = ( /<([a-z][^\/\0>\x20\t\r\n\f]*)/i );
 
 var rscriptType = ( /^$|^module$|\/(?:java|ecma)script/i );
 
 
 
-// We have to close these tags to support XHTML (#13200)
-var wrapMap = {
+( function() {
+	var fragment = document.createDocumentFragment(),
+		div = fragment.appendChild( document.createElement( "div" ) ),
+		input = document.createElement( "input" );
+
+	// Support: Android 4.0 - 4.3 only
+	// Check state lost if the name is set (#11217)
+	// Support: Windows Web Apps (WWA)
+	// `name` and `type` must use .setAttribute for WWA (#14901)
+	input.setAttribute( "type", "radio" );
+	input.setAttribute( "checked", "checked" );
+	input.setAttribute( "name", "t" );
+
+	div.appendChild( input );
+
+	// Support: Android <=4.1 only
+	// Older WebKit doesn't clone checked state correctly in fragments
+	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
+
+	// Support: IE <=11 only
+	// Make sure textarea (and checkbox) defaultValue is properly cloned
+	div.innerHTML = "<textarea>x</textarea>";
+	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
 
 	// Support: IE <=9 only
-	option: [ 1, "<select multiple='multiple'>", "</select>" ],
+	// IE <=9 replaces <option> tags with their contents when inserted outside of
+	// the select element.
+	div.innerHTML = "<option></option>";
+	support.option = !!div.lastChild;
+} )();
+
+
+// We have to close these tags to support XHTML (#13200)
+var wrapMap = {
 
 	// XHTML parsers do not magically insert elements in the
 	// same way that tag soup parsers do. So we cannot shorten
@@ -4693,12 +4951,14 @@ var wrapMap = {
 	_default: [ 0, "", "" ]
 };
 
-// Support: IE <=9 only
-wrapMap.optgroup = wrapMap.option;
-
 wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
 wrapMap.th = wrapMap.td;
 
+// Support: IE <=9 only
+if ( !support.option ) {
+	wrapMap.optgroup = wrapMap.option = [ 1, "<select multiple='multiple'>", "</select>" ];
+}
+
 
 function getAll( context, tag ) {
 
@@ -4742,7 +5002,7 @@ function setGlobalEval( elems, refElements ) {
 var rhtml = /<|&#?\w+;/;
 
 function buildFragment( elems, context, scripts, selection, ignored ) {
-	var elem, tmp, tag, wrap, contains, j,
+	var elem, tmp, tag, wrap, attached, j,
 		fragment = context.createDocumentFragment(),
 		nodes = [],
 		i = 0,
@@ -4806,13 +5066,13 @@ function buildFragment( elems, context, scripts, selection, ignored ) {
 			continue;
 		}
 
-		contains = jQuery.contains( elem.ownerDocument, elem );
+		attached = isAttached( elem );
 
 		// Append to fragment
 		tmp = getAll( fragment.appendChild( elem ), "script" );
 
 		// Preserve script evaluation history
-		if ( contains ) {
+		if ( attached ) {
 			setGlobalEval( tmp );
 		}
 
@@ -4831,38 +5091,7 @@ function buildFragment( elems, context, scripts, selection, ignored ) {
 }
 
 
-( function() {
-	var fragment = document.createDocumentFragment(),
-		div = fragment.appendChild( document.createElement( "div" ) ),
-		input = document.createElement( "input" );
-
-	// Support: Android 4.0 - 4.3 only
-	// Check state lost if the name is set (#11217)
-	// Support: Windows Web Apps (WWA)
-	// `name` and `type` must use .setAttribute for WWA (#14901)
-	input.setAttribute( "type", "radio" );
-	input.setAttribute( "checked", "checked" );
-	input.setAttribute( "name", "t" );
-
-	div.appendChild( input );
-
-	// Support: Android <=4.1 only
-	// Older WebKit doesn't clone checked state correctly in fragments
-	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
-
-	// Support: IE <=11 only
-	// Make sure textarea (and checkbox) defaultValue is properly cloned
-	div.innerHTML = "<textarea>x</textarea>";
-	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
-} )();
-var documentElement = document.documentElement;
-
-
-
-var
-	rkeyEvent = /^key/,
-	rmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,
-	rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
+var rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
 
 function returnTrue() {
 	return true;
@@ -4872,8 +5101,19 @@ function returnFalse() {
 	return false;
 }
 
+// Support: IE <=9 - 11+
+// focus() and blur() are asynchronous, except when they are no-op.
+// So expect focus to be synchronous when the element is already active,
+// and blur to be synchronous when the element is not already active.
+// (focus and blur are always synchronous in other supported browsers,
+// this just defines when we can count on it).
+function expectSync( elem, type ) {
+	return ( elem === safeActiveElement() ) === ( type === "focus" );
+}
+
 // Support: IE <=9 only
-// See #13393 for more info
+// Accessing document.activeElement can throw unexpectedly
+// https://bugs.jquery.com/ticket/13393
 function safeActiveElement() {
 	try {
 		return document.activeElement;
@@ -4956,8 +5196,8 @@ jQuery.event = {
 			special, handlers, type, namespaces, origType,
 			elemData = dataPriv.get( elem );
 
-		// Don't attach events to noData or text/comment nodes (but allow plain objects)
-		if ( !elemData ) {
+		// Only attach events to objects that accept data
+		if ( !acceptData( elem ) ) {
 			return;
 		}
 
@@ -4981,7 +5221,7 @@ jQuery.event = {
 
 		// Init the element's event structure and main handler, if this is the first
 		if ( !( events = elemData.events ) ) {
-			events = elemData.events = {};
+			events = elemData.events = Object.create( null );
 		}
 		if ( !( eventHandle = elemData.handle ) ) {
 			eventHandle = elemData.handle = function( e ) {
@@ -5139,12 +5379,15 @@ jQuery.event = {
 
 	dispatch: function( nativeEvent ) {
 
-		// Make a writable jQuery.Event from the native event object
-		var event = jQuery.event.fix( nativeEvent );
-
 		var i, j, ret, matched, handleObj, handlerQueue,
 			args = new Array( arguments.length ),
-			handlers = ( dataPriv.get( this, "events" ) || {} )[ event.type ] || [],
+
+			// Make a writable jQuery.Event from the native event object
+			event = jQuery.event.fix( nativeEvent ),
+
+			handlers = (
+				dataPriv.get( this, "events" ) || Object.create( null )
+			)[ event.type ] || [],
 			special = jQuery.event.special[ event.type ] || {};
 
 		// Use the fix-ed jQuery.Event rather than the (read-only) native event
@@ -5173,9 +5416,10 @@ jQuery.event = {
 			while ( ( handleObj = matched.handlers[ j++ ] ) &&
 				!event.isImmediatePropagationStopped() ) {
 
-				// Triggered event must either 1) have no namespace, or 2) have namespace(s)
-				// a subset or equal to those in the bound event (both can have no namespace).
-				if ( !event.rnamespace || event.rnamespace.test( handleObj.namespace ) ) {
+				// If the event is namespaced, then each handler is only invoked if it is
+				// specially universal or its namespaces are a superset of the event's.
+				if ( !event.rnamespace || handleObj.namespace === false ||
+					event.rnamespace.test( handleObj.namespace ) ) {
 
 					event.handleObj = handleObj;
 					event.data = handleObj.data;
@@ -5267,12 +5511,12 @@ jQuery.event = {
 			get: isFunction( hook ) ?
 				function() {
 					if ( this.originalEvent ) {
-							return hook( this.originalEvent );
+						return hook( this.originalEvent );
 					}
 				} :
 				function() {
 					if ( this.originalEvent ) {
-							return this.originalEvent[ name ];
+						return this.originalEvent[ name ];
 					}
 				},
 
@@ -5299,39 +5543,51 @@ jQuery.event = {
 			// Prevent triggered image.load events from bubbling to window.load
 			noBubble: true
 		},
-		focus: {
+		click: {
 
-			// Fire native event if possible so blur/focus sequence is correct
-			trigger: function() {
-				if ( this !== safeActiveElement() && this.focus ) {
-					this.focus();
-					return false;
-				}
-			},
-			delegateType: "focusin"
-		},
-		blur: {
-			trigger: function() {
-				if ( this === safeActiveElement() && this.blur ) {
-					this.blur();
-					return false;
+			// Utilize native event to ensure correct state for checkable inputs
+			setup: function( data ) {
+
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Claim the first handler
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					// dataPriv.set( el, "click", ... )
+					leverageNative( el, "click", returnTrue );
 				}
+
+				// Return false to allow normal processing in the caller
+				return false;
 			},
-			delegateType: "focusout"
-		},
-		click: {
+			trigger: function( data ) {
 
-			// For checkbox, fire native event so checked state will be right
-			trigger: function() {
-				if ( this.type === "checkbox" && this.click && nodeName( this, "input" ) ) {
-					this.click();
-					return false;
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Force setup before triggering a click
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					leverageNative( el, "click" );
 				}
+
+				// Return non-false to allow normal event-path propagation
+				return true;
 			},
 
-			// For cross-browser consistency, don't fire native .click() on links
+			// For cross-browser consistency, suppress native .click() on links
+			// Also prevent it if we're currently inside a leveraged native-event stack
 			_default: function( event ) {
-				return nodeName( event.target, "a" );
+				var target = event.target;
+				return rcheckableType.test( target.type ) &&
+					target.click && nodeName( target, "input" ) &&
+					dataPriv.get( target, "click" ) ||
+					nodeName( target, "a" );
 			}
 		},
 
@@ -5348,6 +5604,99 @@ jQuery.event = {
 	}
 };
 
+// Ensure the presence of an event listener that handles manually-triggered
+// synthetic events by interrupting progress until reinvoked in response to
+// *native* events that it fires directly, ensuring that state changes have
+// already occurred before other listeners are invoked.
+function leverageNative( el, type, expectSync ) {
+
+	// Missing expectSync indicates a trigger call, which must force setup through jQuery.event.add
+	if ( !expectSync ) {
+		if ( dataPriv.get( el, type ) === undefined ) {
+			jQuery.event.add( el, type, returnTrue );
+		}
+		return;
+	}
+
+	// Register the controller as a special universal handler for all event namespaces
+	dataPriv.set( el, type, false );
+	jQuery.event.add( el, type, {
+		namespace: false,
+		handler: function( event ) {
+			var notAsync, result,
+				saved = dataPriv.get( this, type );
+
+			if ( ( event.isTrigger & 1 ) && this[ type ] ) {
+
+				// Interrupt processing of the outer synthetic .trigger()ed event
+				// Saved data should be false in such cases, but might be a leftover capture object
+				// from an async native handler (gh-4350)
+				if ( !saved.length ) {
+
+					// Store arguments for use when handling the inner native event
+					// There will always be at least one argument (an event object), so this array
+					// will not be confused with a leftover capture object.
+					saved = slice.call( arguments );
+					dataPriv.set( this, type, saved );
+
+					// Trigger the native event and capture its result
+					// Support: IE <=9 - 11+
+					// focus() and blur() are asynchronous
+					notAsync = expectSync( this, type );
+					this[ type ]();
+					result = dataPriv.get( this, type );
+					if ( saved !== result || notAsync ) {
+						dataPriv.set( this, type, false );
+					} else {
+						result = {};
+					}
+					if ( saved !== result ) {
+
+						// Cancel the outer synthetic event
+						event.stopImmediatePropagation();
+						event.preventDefault();
+
+						// Support: Chrome 86+
+						// In Chrome, if an element having a focusout handler is blurred by
+						// clicking outside of it, it invokes the handler synchronously. If
+						// that handler calls `.remove()` on the element, the data is cleared,
+						// leaving `result` undefined. We need to guard against this.
+						return result && result.value;
+					}
+
+				// If this is an inner synthetic event for an event with a bubbling surrogate
+				// (focus or blur), assume that the surrogate already propagated from triggering the
+				// native event and prevent that from happening again here.
+				// This technically gets the ordering wrong w.r.t. to `.trigger()` (in which the
+				// bubbling surrogate propagates *after* the non-bubbling base), but that seems
+				// less bad than duplication.
+				} else if ( ( jQuery.event.special[ type ] || {} ).delegateType ) {
+					event.stopPropagation();
+				}
+
+			// If this is a native event triggered above, everything is now in order
+			// Fire an inner synthetic event with the original arguments
+			} else if ( saved.length ) {
+
+				// ...and capture the result
+				dataPriv.set( this, type, {
+					value: jQuery.event.trigger(
+
+						// Support: IE <=9 - 11+
+						// Extend with the prototype to reset the above stopImmediatePropagation()
+						jQuery.extend( saved[ 0 ], jQuery.Event.prototype ),
+						saved.slice( 1 ),
+						this
+					)
+				} );
+
+				// Abort handling of the native event
+				event.stopImmediatePropagation();
+			}
+		}
+	} );
+}
+
 jQuery.removeEvent = function( elem, type, handle ) {
 
 	// This "if" is needed for plain objects
@@ -5460,6 +5809,7 @@ jQuery.each( {
 	shiftKey: true,
 	view: true,
 	"char": true,
+	code: true,
 	charCode: true,
 	key: true,
 	keyCode: true,
@@ -5476,35 +5826,41 @@ jQuery.each( {
 	targetTouches: true,
 	toElement: true,
 	touches: true,
+	which: true
+}, jQuery.event.addProp );
 
-	which: function( event ) {
-		var button = event.button;
+jQuery.each( { focus: "focusin", blur: "focusout" }, function( type, delegateType ) {
+	jQuery.event.special[ type ] = {
 
-		// Add which for key events
-		if ( event.which == null && rkeyEvent.test( event.type ) ) {
-			return event.charCode != null ? event.charCode : event.keyCode;
-		}
+		// Utilize native event if possible so blur/focus sequence is correct
+		setup: function() {
 
-		// Add which for click: 1 === left; 2 === middle; 3 === right
-		if ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {
-			if ( button & 1 ) {
-				return 1;
-			}
+			// Claim the first handler
+			// dataPriv.set( this, "focus", ... )
+			// dataPriv.set( this, "blur", ... )
+			leverageNative( this, type, expectSync );
 
-			if ( button & 2 ) {
-				return 3;
-			}
+			// Return false to allow normal processing in the caller
+			return false;
+		},
+		trigger: function() {
 
-			if ( button & 4 ) {
-				return 2;
-			}
+			// Force setup before trigger
+			leverageNative( this, type );
 
-			return 0;
-		}
+			// Return non-false to allow normal event-path propagation
+			return true;
+		},
 
-		return event.which;
-	}
-}, jQuery.event.addProp );
+		// Suppress native focus or blur as it's already being fired
+		// in leverageNative.
+		_default: function() {
+			return true;
+		},
+
+		delegateType: delegateType
+	};
+} );
 
 // Create mouseenter/leave events using mouseover/out and event-time checks
 // so that event delegation works in jQuery.
@@ -5591,13 +5947,6 @@ jQuery.fn.extend( {
 
 var
 
-	/* eslint-disable max-len */
-
-	// See https://github.com/eslint/eslint/issues/3229
-	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\/\0>\x20\t\r\n\f]*)[^>]*)\/>/gi,
-
-	/* eslint-enable */
-
 	// Support: IE <=10 - 11, Edge 12 - 13 only
 	// In IE/Edge using regex groups here causes severe slowdowns.
 	// See https://connect.microsoft.com/IE/feedback/details/1736512/
@@ -5634,7 +5983,7 @@ function restoreScript( elem ) {
 }
 
 function cloneCopyEvent( src, dest ) {
-	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
+	var i, l, type, pdataOld, udataOld, udataCur, events;
 
 	if ( dest.nodeType !== 1 ) {
 		return;
@@ -5642,13 +5991,11 @@ function cloneCopyEvent( src, dest ) {
 
 	// 1. Copy private data: events, handlers, etc.
 	if ( dataPriv.hasData( src ) ) {
-		pdataOld = dataPriv.access( src );
-		pdataCur = dataPriv.set( dest, pdataOld );
+		pdataOld = dataPriv.get( src );
 		events = pdataOld.events;
 
 		if ( events ) {
-			delete pdataCur.handle;
-			pdataCur.events = {};
+			dataPriv.remove( dest, "handle events" );
 
 			for ( type in events ) {
 				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
@@ -5684,7 +6031,7 @@ function fixInput( src, dest ) {
 function domManip( collection, args, callback, ignored ) {
 
 	// Flatten any nested arrays
-	args = concat.apply( [], args );
+	args = flat( args );
 
 	var fragment, first, scripts, hasScripts, node, doc,
 		i = 0,
@@ -5756,11 +6103,13 @@ function domManip( collection, args, callback, ignored ) {
 						if ( node.src && ( node.type || "" ).toLowerCase()  !== "module" ) {
 
 							// Optional AJAX dependency, but won't run scripts if not present
-							if ( jQuery._evalUrl ) {
-								jQuery._evalUrl( node.src );
+							if ( jQuery._evalUrl && !node.noModule ) {
+								jQuery._evalUrl( node.src, {
+									nonce: node.nonce || node.getAttribute( "nonce" )
+								}, doc );
 							}
 						} else {
-							DOMEval( node.textContent.replace( rcleanScript, "" ), doc, node );
+							DOMEval( node.textContent.replace( rcleanScript, "" ), node, doc );
 						}
 					}
 				}
@@ -5782,7 +6131,7 @@ function remove( elem, selector, keepData ) {
 		}
 
 		if ( node.parentNode ) {
-			if ( keepData && jQuery.contains( node.ownerDocument, node ) ) {
+			if ( keepData && isAttached( node ) ) {
 				setGlobalEval( getAll( node, "script" ) );
 			}
 			node.parentNode.removeChild( node );
@@ -5794,13 +6143,13 @@ function remove( elem, selector, keepData ) {
 
 jQuery.extend( {
 	htmlPrefilter: function( html ) {
-		return html.replace( rxhtmlTag, "<$1></$2>" );
+		return html;
 	},
 
 	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
 		var i, l, srcElements, destElements,
 			clone = elem.cloneNode( true ),
-			inPage = jQuery.contains( elem.ownerDocument, elem );
+			inPage = isAttached( elem );
 
 		// Fix IE cloning issues
 		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
@@ -6056,6 +6405,27 @@ var getStyles = function( elem ) {
 		return view.getComputedStyle( elem );
 	};
 
+var swap = function( elem, options, callback ) {
+	var ret, name,
+		old = {};
+
+	// Remember the old values, and insert the new ones
+	for ( name in options ) {
+		old[ name ] = elem.style[ name ];
+		elem.style[ name ] = options[ name ];
+	}
+
+	ret = callback.call( elem );
+
+	// Revert the old values
+	for ( name in options ) {
+		elem.style[ name ] = old[ name ];
+	}
+
+	return ret;
+};
+
+
 var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
 
 
@@ -6096,8 +6466,10 @@ var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
 
 		// Support: IE 9 only
 		// Detect overflow:scroll screwiness (gh-3699)
+		// Support: Chrome <=64
+		// Don't get tricked when zoom affects offsetWidth (gh-4029)
 		div.style.position = "absolute";
-		scrollboxSizeVal = div.offsetWidth === 36 || "absolute";
+		scrollboxSizeVal = roundPixelMeasures( div.offsetWidth / 3 ) === 12;
 
 		documentElement.removeChild( container );
 
@@ -6111,7 +6483,7 @@ var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
 	}
 
 	var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
-		reliableMarginLeftVal,
+		reliableTrDimensionsVal, reliableMarginLeftVal,
 		container = document.createElement( "div" ),
 		div = document.createElement( "div" );
 
@@ -6146,6 +6518,54 @@ var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
 		scrollboxSize: function() {
 			computeStyleTests();
 			return scrollboxSizeVal;
+		},
+
+		// Support: IE 9 - 11+, Edge 15 - 18+
+		// IE/Edge misreport `getComputedStyle` of table rows with width/height
+		// set in CSS while `offset*` properties report correct values.
+		// Behavior in IE 9 is more subtle than in newer versions & it passes
+		// some versions of this test; make sure not to make it pass there!
+		//
+		// Support: Firefox 70+
+		// Only Firefox includes border widths
+		// in computed dimensions. (gh-4529)
+		reliableTrDimensions: function() {
+			var table, tr, trChild, trStyle;
+			if ( reliableTrDimensionsVal == null ) {
+				table = document.createElement( "table" );
+				tr = document.createElement( "tr" );
+				trChild = document.createElement( "div" );
+
+				table.style.cssText = "position:absolute;left:-11111px;border-collapse:separate";
+				tr.style.cssText = "border:1px solid";
+
+				// Support: Chrome 86+
+				// Height set through cssText does not get applied.
+				// Computed height then comes back as 0.
+				tr.style.height = "1px";
+				trChild.style.height = "9px";
+
+				// Support: Android 8 Chrome 86+
+				// In our bodyBackground.html iframe,
+				// display for all div elements is set to "inline",
+				// which causes a problem only in Android 8 Chrome 86.
+				// Ensuring the div is display: block
+				// gets around this issue.
+				trChild.style.display = "block";
+
+				documentElement
+					.appendChild( table )
+					.appendChild( tr )
+					.appendChild( trChild );
+
+				trStyle = window.getComputedStyle( tr );
+				reliableTrDimensionsVal = ( parseInt( trStyle.height, 10 ) +
+					parseInt( trStyle.borderTopWidth, 10 ) +
+					parseInt( trStyle.borderBottomWidth, 10 ) ) === tr.offsetHeight;
+
+				documentElement.removeChild( table );
+			}
+			return reliableTrDimensionsVal;
 		}
 	} );
 } )();
@@ -6168,7 +6588,7 @@ function curCSS( elem, name, computed ) {
 	if ( computed ) {
 		ret = computed.getPropertyValue( name ) || computed[ name ];
 
-		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
+		if ( ret === "" && !isAttached( elem ) ) {
 			ret = jQuery.style( elem, name );
 		}
 
@@ -6224,30 +6644,13 @@ function addGetHookIf( conditionFn, hookFn ) {
 }
 
 
-var
-
-	// Swappable if display is none or starts with table
-	// except "table", "table-cell", or "table-caption"
-	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
-	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
-	rcustomProp = /^--/,
-	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
-	cssNormalTransform = {
-		letterSpacing: "0",
-		fontWeight: "400"
-	},
-
-	cssPrefixes = [ "Webkit", "Moz", "ms" ],
-	emptyStyle = document.createElement( "div" ).style;
+var cssPrefixes = [ "Webkit", "Moz", "ms" ],
+	emptyStyle = document.createElement( "div" ).style,
+	vendorProps = {};
 
-// Return a css property mapped to a potentially vendor prefixed property
+// Return a vendor-prefixed property or undefined
 function vendorPropName( name ) {
 
-	// Shortcut for names that are not vendor prefixed
-	if ( name in emptyStyle ) {
-		return name;
-	}
-
 	// Check for vendor prefixed names
 	var capName = name[ 0 ].toUpperCase() + name.slice( 1 ),
 		i = cssPrefixes.length;
@@ -6260,17 +6663,34 @@ function vendorPropName( name ) {
 	}
 }
 
-// Return a property mapped along what jQuery.cssProps suggests or to
-// a vendor prefixed property.
+// Return a potentially-mapped jQuery.cssProps or vendor prefixed property
 function finalPropName( name ) {
-	var ret = jQuery.cssProps[ name ];
-	if ( !ret ) {
-		ret = jQuery.cssProps[ name ] = vendorPropName( name ) || name;
+	var final = jQuery.cssProps[ name ] || vendorProps[ name ];
+
+	if ( final ) {
+		return final;
 	}
-	return ret;
+	if ( name in emptyStyle ) {
+		return name;
+	}
+	return vendorProps[ name ] = vendorPropName( name ) || name;
 }
 
-function setPositiveNumber( elem, value, subtract ) {
+
+var
+
+	// Swappable if display is none or starts with table
+	// except "table", "table-cell", or "table-caption"
+	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
+	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
+	rcustomProp = /^--/,
+	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
+	cssNormalTransform = {
+		letterSpacing: "0",
+		fontWeight: "400"
+	};
+
+function setPositiveNumber( _elem, value, subtract ) {
 
 	// Any relative (+/-) values have already been
 	// normalized at this point
@@ -6341,7 +6761,10 @@ function boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computed
 			delta -
 			extra -
 			0.5
-		) );
+
+		// If offsetWidth/offsetHeight is unknown, then we can't determine content-box scroll gutter
+		// Use an explicit zero to avoid NaN (gh-3964)
+		) ) || 0;
 	}
 
 	return delta;
@@ -6351,9 +6774,16 @@ function getWidthOrHeight( elem, dimension, extra ) {
 
 	// Start with computed style
 	var styles = getStyles( elem ),
+
+		// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-4322).
+		// Fake content-box until we know it's needed to know the true value.
+		boxSizingNeeded = !support.boxSizingReliable() || extra,
+		isBorderBox = boxSizingNeeded &&
+			jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+		valueIsBorderBox = isBorderBox,
+
 		val = curCSS( elem, dimension, styles ),
-		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
-		valueIsBorderBox = isBorderBox;
+		offsetProp = "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );
 
 	// Support: Firefox <=54
 	// Return a confounding non-pixel value or feign ignorance, as appropriate.
@@ -6364,22 +6794,38 @@ function getWidthOrHeight( elem, dimension, extra ) {
 		val = "auto";
 	}
 
-	// Check for style in case a browser which returns unreliable values
-	// for getComputedStyle silently falls back to the reliable elem.style
-	valueIsBorderBox = valueIsBorderBox &&
-		( support.boxSizingReliable() || val === elem.style[ dimension ] );
 
-	// Fall back to offsetWidth/offsetHeight when value is "auto"
-	// This happens for inline elements with no explicit setting (gh-3571)
-	// Support: Android <=4.1 - 4.3 only
-	// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
-	if ( val === "auto" ||
-		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) {
+	// Support: IE 9 - 11 only
+	// Use offsetWidth/offsetHeight for when box sizing is unreliable.
+	// In those cases, the computed value can be trusted to be border-box.
+	if ( ( !support.boxSizingReliable() && isBorderBox ||
+
+		// Support: IE 10 - 11+, Edge 15 - 18+
+		// IE/Edge misreport `getComputedStyle` of table rows with width/height
+		// set in CSS while `offset*` properties report correct values.
+		// Interestingly, in some cases IE 9 doesn't suffer from this issue.
+		!support.reliableTrDimensions() && nodeName( elem, "tr" ) ||
+
+		// Fall back to offsetWidth/offsetHeight when value is "auto"
+		// This happens for inline elements with no explicit setting (gh-3571)
+		val === "auto" ||
+
+		// Support: Android <=4.1 - 4.3 only
+		// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
+		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) &&
 
-		val = elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ];
+		// Make sure the element is visible & connected
+		elem.getClientRects().length ) {
 
-		// offsetWidth/offsetHeight provide border-box values
-		valueIsBorderBox = true;
+		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
+
+		// Where available, offsetWidth/offsetHeight approximate border box dimensions.
+		// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the
+		// retrieved value as a content box dimension.
+		valueIsBorderBox = offsetProp in elem;
+		if ( valueIsBorderBox ) {
+			val = elem[ offsetProp ];
+		}
 	}
 
 	// Normalize "" and auto
@@ -6425,6 +6871,13 @@ jQuery.extend( {
 		"flexGrow": true,
 		"flexShrink": true,
 		"fontWeight": true,
+		"gridArea": true,
+		"gridColumn": true,
+		"gridColumnEnd": true,
+		"gridColumnStart": true,
+		"gridRow": true,
+		"gridRowEnd": true,
+		"gridRowStart": true,
 		"lineHeight": true,
 		"opacity": true,
 		"order": true,
@@ -6480,7 +6933,9 @@ jQuery.extend( {
 			}
 
 			// If a number was passed in, add the unit (except for certain CSS properties)
-			if ( type === "number" ) {
+			// The isCustomProp check can be removed in jQuery 4.0 when we only auto-append
+			// "px" to a few hardcoded values.
+			if ( type === "number" && !isCustomProp ) {
 				value += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? "" : "px" );
 			}
 
@@ -6554,7 +7009,7 @@ jQuery.extend( {
 	}
 } );
 
-jQuery.each( [ "height", "width" ], function( i, dimension ) {
+jQuery.each( [ "height", "width" ], function( _i, dimension ) {
 	jQuery.cssHooks[ dimension ] = {
 		get: function( elem, computed, extra ) {
 			if ( computed ) {
@@ -6570,28 +7025,39 @@ jQuery.each( [ "height", "width" ], function( i, dimension ) {
 					// Running getBoundingClientRect on a disconnected node
 					// in IE throws an error.
 					( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?
-						swap( elem, cssShow, function() {
-							return getWidthOrHeight( elem, dimension, extra );
-						} ) :
-						getWidthOrHeight( elem, dimension, extra );
+					swap( elem, cssShow, function() {
+						return getWidthOrHeight( elem, dimension, extra );
+					} ) :
+					getWidthOrHeight( elem, dimension, extra );
 			}
 		},
 
 		set: function( elem, value, extra ) {
 			var matches,
 				styles = getStyles( elem ),
-				isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
-				subtract = extra && boxModelAdjustment(
-					elem,
-					dimension,
-					extra,
-					isBorderBox,
-					styles
-				);
+
+				// Only read styles.position if the test has a chance to fail
+				// to avoid forcing a reflow.
+				scrollboxSizeBuggy = !support.scrollboxSize() &&
+					styles.position === "absolute",
+
+				// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991)
+				boxSizingNeeded = scrollboxSizeBuggy || extra,
+				isBorderBox = boxSizingNeeded &&
+					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+				subtract = extra ?
+					boxModelAdjustment(
+						elem,
+						dimension,
+						extra,
+						isBorderBox,
+						styles
+					) :
+					0;
 
 			// Account for unreliable border-box dimensions by comparing offset* to computed and
 			// faking a content-box to get border and padding (gh-3699)
-			if ( isBorderBox && support.scrollboxSize() === styles.position ) {
+			if ( isBorderBox && scrollboxSizeBuggy ) {
 				subtract -= Math.ceil(
 					elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
 					parseFloat( styles[ dimension ] ) -
@@ -6621,7 +7087,7 @@ jQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,
 					swap( elem, { marginLeft: 0 }, function() {
 						return elem.getBoundingClientRect().left;
 					} )
-				) + "px";
+			) + "px";
 		}
 	}
 );
@@ -6759,9 +7225,9 @@ Tween.propHooks = {
 			// Use .style if available and use plain properties where available.
 			if ( jQuery.fx.step[ tween.prop ] ) {
 				jQuery.fx.step[ tween.prop ]( tween );
-			} else if ( tween.elem.nodeType === 1 &&
-				( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null ||
-					jQuery.cssHooks[ tween.prop ] ) ) {
+			} else if ( tween.elem.nodeType === 1 && (
+				jQuery.cssHooks[ tween.prop ] ||
+					tween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {
 				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
 			} else {
 				tween.elem[ tween.prop ] = tween.now;
@@ -7005,7 +7471,7 @@ function defaultPrefilter( elem, props, opts ) {
 
 			anim.done( function() {
 
-			/* eslint-enable no-loop-func */
+				/* eslint-enable no-loop-func */
 
 				// The final step of a "hide" animation is actually hiding the element
 				if ( !hidden ) {
@@ -7125,7 +7591,7 @@ function Animation( elem, properties, options ) {
 			tweens: [],
 			createTween: function( prop, end ) {
 				var tween = jQuery.Tween( elem, animation.opts, prop, end,
-						animation.opts.specialEasing[ prop ] || animation.opts.easing );
+					animation.opts.specialEasing[ prop ] || animation.opts.easing );
 				animation.tweens.push( tween );
 				return tween;
 			},
@@ -7298,7 +7764,8 @@ jQuery.fn.extend( {
 					anim.stop( true );
 				}
 			};
-			doAnimation.finish = doAnimation;
+
+		doAnimation.finish = doAnimation;
 
 		return empty || optall.queue === false ?
 			this.each( doAnimation ) :
@@ -7316,7 +7783,7 @@ jQuery.fn.extend( {
 			clearQueue = type;
 			type = undefined;
 		}
-		if ( clearQueue && type !== false ) {
+		if ( clearQueue ) {
 			this.queue( type || "fx", [] );
 		}
 
@@ -7399,7 +7866,7 @@ jQuery.fn.extend( {
 	}
 } );
 
-jQuery.each( [ "toggle", "show", "hide" ], function( i, name ) {
+jQuery.each( [ "toggle", "show", "hide" ], function( _i, name ) {
 	var cssFn = jQuery.fn[ name ];
 	jQuery.fn[ name ] = function( speed, easing, callback ) {
 		return speed == null || typeof speed === "boolean" ?
@@ -7620,7 +8087,7 @@ boolHook = {
 	}
 };
 
-jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
+jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( _i, name ) {
 	var getter = attrHandle[ name ] || jQuery.find.attr;
 
 	attrHandle[ name ] = function( elem, name, isXML ) {
@@ -7938,8 +8405,8 @@ jQuery.fn.extend( {
 				if ( this.setAttribute ) {
 					this.setAttribute( "class",
 						className || value === false ?
-						"" :
-						dataPriv.get( this, "__className__" ) || ""
+							"" :
+							dataPriv.get( this, "__className__" ) || ""
 					);
 				}
 			}
@@ -7954,7 +8421,7 @@ jQuery.fn.extend( {
 		while ( ( elem = this[ i++ ] ) ) {
 			if ( elem.nodeType === 1 &&
 				( " " + stripAndCollapse( getClass( elem ) ) + " " ).indexOf( className ) > -1 ) {
-					return true;
+				return true;
 			}
 		}
 
@@ -8244,7 +8711,7 @@ jQuery.extend( jQuery.event, {
 				special.bindType || type;
 
 			// jQuery handler
-			handle = ( dataPriv.get( cur, "events" ) || {} )[ event.type ] &&
+			handle = ( dataPriv.get( cur, "events" ) || Object.create( null ) )[ event.type ] &&
 				dataPriv.get( cur, "handle" );
 			if ( handle ) {
 				handle.apply( cur, data );
@@ -8355,7 +8822,10 @@ if ( !support.focusin ) {
 
 		jQuery.event.special[ fix ] = {
 			setup: function() {
-				var doc = this.ownerDocument || this,
+
+				// Handle: regular nodes (via `this.ownerDocument`), window
+				// (via `this.document`) & document (via `this`).
+				var doc = this.ownerDocument || this.document || this,
 					attaches = dataPriv.access( doc, fix );
 
 				if ( !attaches ) {
@@ -8364,7 +8834,7 @@ if ( !support.focusin ) {
 				dataPriv.access( doc, fix, ( attaches || 0 ) + 1 );
 			},
 			teardown: function() {
-				var doc = this.ownerDocument || this,
+				var doc = this.ownerDocument || this.document || this,
 					attaches = dataPriv.access( doc, fix ) - 1;
 
 				if ( !attaches ) {
@@ -8380,7 +8850,7 @@ if ( !support.focusin ) {
 }
 var location = window.location;
 
-var nonce = Date.now();
+var nonce = { guid: Date.now() };
 
 var rquery = ( /\?/ );
 
@@ -8388,7 +8858,7 @@ var rquery = ( /\?/ );
 
 // Cross-browser xml parsing
 jQuery.parseXML = function( data ) {
-	var xml;
+	var xml, parserErrorElem;
 	if ( !data || typeof data !== "string" ) {
 		return null;
 	}
@@ -8397,12 +8867,17 @@ jQuery.parseXML = function( data ) {
 	// IE throws on parseFromString with invalid input.
 	try {
 		xml = ( new window.DOMParser() ).parseFromString( data, "text/xml" );
-	} catch ( e ) {
-		xml = undefined;
-	}
+	} catch ( e ) {}
 
-	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
-		jQuery.error( "Invalid XML: " + data );
+	parserErrorElem = xml && xml.getElementsByTagName( "parsererror" )[ 0 ];
+	if ( !xml || parserErrorElem ) {
+		jQuery.error( "Invalid XML: " + (
+			parserErrorElem ?
+				jQuery.map( parserErrorElem.childNodes, function( el ) {
+					return el.textContent;
+				} ).join( "\n" ) :
+				data
+		) );
 	}
 	return xml;
 };
@@ -8468,6 +8943,10 @@ jQuery.param = function( a, traditional ) {
 				encodeURIComponent( value == null ? "" : value );
 		};
 
+	if ( a == null ) {
+		return "";
+	}
+
 	// If an array was passed in, assume that it is an array of form elements.
 	if ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
 
@@ -8499,16 +8978,14 @@ jQuery.fn.extend( {
 			// Can add propHook for "elements" to filter or add form elements
 			var elements = jQuery.prop( this, "elements" );
 			return elements ? jQuery.makeArray( elements ) : this;
-		} )
-		.filter( function() {
+		} ).filter( function() {
 			var type = this.type;
 
 			// Use .is( ":disabled" ) so that fieldset[disabled] works
 			return this.name && !jQuery( this ).is( ":disabled" ) &&
 				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
 				( this.checked || !rcheckableType.test( type ) );
-		} )
-		.map( function( i, elem ) {
+		} ).map( function( _i, elem ) {
 			var val = jQuery( this ).val();
 
 			if ( val == null ) {
@@ -8561,7 +9038,8 @@ var
 
 	// Anchor tag for parsing the document origin
 	originAnchor = document.createElement( "a" );
-	originAnchor.href = location.href;
+
+originAnchor.href = location.href;
 
 // Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
 function addToPrefiltersOrTransports( structure ) {
@@ -8942,8 +9420,8 @@ jQuery.extend( {
 			// Context for global events is callbackContext if it is a DOM node or jQuery collection
 			globalEventContext = s.context &&
 				( callbackContext.nodeType || callbackContext.jquery ) ?
-					jQuery( callbackContext ) :
-					jQuery.event,
+				jQuery( callbackContext ) :
+				jQuery.event,
 
 			// Deferreds
 			deferred = jQuery.Deferred(),
@@ -8970,12 +9448,14 @@ jQuery.extend( {
 						if ( !responseHeaders ) {
 							responseHeaders = {};
 							while ( ( match = rheaders.exec( responseHeadersString ) ) ) {
-								responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
+								responseHeaders[ match[ 1 ].toLowerCase() + " " ] =
+									( responseHeaders[ match[ 1 ].toLowerCase() + " " ] || [] )
+										.concat( match[ 2 ] );
 							}
 						}
-						match = responseHeaders[ key.toLowerCase() ];
+						match = responseHeaders[ key.toLowerCase() + " " ];
 					}
-					return match == null ? null : match;
+					return match == null ? null : match.join( ", " );
 				},
 
 				// Raw string
@@ -9119,7 +9599,8 @@ jQuery.extend( {
 			// Add or update anti-cache param if needed
 			if ( s.cache === false ) {
 				cacheURL = cacheURL.replace( rantiCache, "$1" );
-				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce++ ) + uncached;
+				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce.guid++ ) +
+					uncached;
 			}
 
 			// Put hash and anti-cache on the URL that will be requested (gh-1732)
@@ -9252,6 +9733,13 @@ jQuery.extend( {
 				response = ajaxHandleResponses( s, jqXHR, responses );
 			}
 
+			// Use a noop converter for missing script but not if jsonp
+			if ( !isSuccess &&
+				jQuery.inArray( "script", s.dataTypes ) > -1 &&
+				jQuery.inArray( "json", s.dataTypes ) < 0 ) {
+				s.converters[ "text script" ] = function() {};
+			}
+
 			// Convert no matter what (that way responseXXX fields are always set)
 			response = ajaxConvert( s, response, jqXHR, isSuccess );
 
@@ -9342,7 +9830,7 @@ jQuery.extend( {
 	}
 } );
 
-jQuery.each( [ "get", "post" ], function( i, method ) {
+jQuery.each( [ "get", "post" ], function( _i, method ) {
 	jQuery[ method ] = function( url, data, callback, type ) {
 
 		// Shift arguments if data argument was omitted
@@ -9363,8 +9851,17 @@ jQuery.each( [ "get", "post" ], function( i, method ) {
 	};
 } );
 
+jQuery.ajaxPrefilter( function( s ) {
+	var i;
+	for ( i in s.headers ) {
+		if ( i.toLowerCase() === "content-type" ) {
+			s.contentType = s.headers[ i ] || "";
+		}
+	}
+} );
+
 
-jQuery._evalUrl = function( url ) {
+jQuery._evalUrl = function( url, options, doc ) {
 	return jQuery.ajax( {
 		url: url,
 
@@ -9374,7 +9871,16 @@ jQuery._evalUrl = function( url ) {
 		cache: true,
 		async: false,
 		global: false,
-		"throws": true
+
+		// Only evaluate the response if it is successful (gh-4126)
+		// dataFilter is not invoked for failure responses, so using it instead
+		// of the default converter is kludgy but it works.
+		converters: {
+			"text script": function() {}
+		},
+		dataFilter: function( response ) {
+			jQuery.globalEval( response, options, doc );
+		}
 	} );
 };
 
@@ -9657,24 +10163,21 @@ jQuery.ajaxPrefilter( "script", function( s ) {
 // Bind script tag hack transport
 jQuery.ajaxTransport( "script", function( s ) {
 
-	// This transport only deals with cross domain requests
-	if ( s.crossDomain ) {
+	// This transport only deals with cross domain or forced-by-attrs requests
+	if ( s.crossDomain || s.scriptAttrs ) {
 		var script, callback;
 		return {
 			send: function( _, complete ) {
-				script = jQuery( "<script>" ).prop( {
-					charset: s.scriptCharset,
-					src: s.url
-				} ).on(
-					"load error",
-					callback = function( evt ) {
+				script = jQuery( "<script>" )
+					.attr( s.scriptAttrs || {} )
+					.prop( { charset: s.scriptCharset, src: s.url } )
+					.on( "load error", callback = function( evt ) {
 						script.remove();
 						callback = null;
 						if ( evt ) {
 							complete( evt.type === "error" ? 404 : 200, evt.type );
 						}
-					}
-				);
+					} );
 
 				// Use native DOM manipulation to avoid our domManip AJAX trickery
 				document.head.appendChild( script[ 0 ] );
@@ -9698,7 +10201,7 @@ var oldCallbacks = [],
 jQuery.ajaxSetup( {
 	jsonp: "callback",
 	jsonpCallback: function() {
-		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
+		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce.guid++ ) );
 		this[ callback ] = true;
 		return callback;
 	}
@@ -9915,23 +10418,6 @@ jQuery.fn.load = function( url, params, callback ) {
 
 
 
-// Attach a bunch of functions for handling common AJAX events
-jQuery.each( [
-	"ajaxStart",
-	"ajaxStop",
-	"ajaxComplete",
-	"ajaxError",
-	"ajaxSuccess",
-	"ajaxSend"
-], function( i, type ) {
-	jQuery.fn[ type ] = function( fn ) {
-		return this.on( type, fn );
-	};
-} );
-
-
-
-
 jQuery.expr.pseudos.animated = function( elem ) {
 	return jQuery.grep( jQuery.timers, function( fn ) {
 		return elem === fn.elem;
@@ -10138,7 +10624,7 @@ jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function(
 // Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347
 // getComputedStyle returns percent when specified for top/left/bottom/right;
 // rather than make the css module depend on the offset module, just check for it here
-jQuery.each( [ "top", "left" ], function( i, prop ) {
+jQuery.each( [ "top", "left" ], function( _i, prop ) {
 	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
 		function( elem, computed ) {
 			if ( computed ) {
@@ -10156,8 +10642,11 @@ jQuery.each( [ "top", "left" ], function( i, prop ) {
 
 // Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
 jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
-	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name },
-		function( defaultExtra, funcName ) {
+	jQuery.each( {
+		padding: "inner" + name,
+		content: type,
+		"": "outer" + name
+	}, function( defaultExtra, funcName ) {
 
 		// Margin is only for outerHeight, outerWidth
 		jQuery.fn[ funcName ] = function( margin, value ) {
@@ -10201,25 +10690,19 @@ jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
 } );
 
 
-jQuery.each( ( "blur focus focusin focusout resize scroll click dblclick " +
-	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
-	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
-	function( i, name ) {
-
-	// Handle event binding
-	jQuery.fn[ name ] = function( data, fn ) {
-		return arguments.length > 0 ?
-			this.on( name, null, data, fn ) :
-			this.trigger( name );
+jQuery.each( [
+	"ajaxStart",
+	"ajaxStop",
+	"ajaxComplete",
+	"ajaxError",
+	"ajaxSuccess",
+	"ajaxSend"
+], function( _i, type ) {
+	jQuery.fn[ type ] = function( fn ) {
+		return this.on( type, fn );
 	};
 } );
 
-jQuery.fn.extend( {
-	hover: function( fnOver, fnOut ) {
-		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
-	}
-} );
-
 
 
 
@@ -10241,9 +10724,35 @@ jQuery.fn.extend( {
 		return arguments.length === 1 ?
 			this.off( selector, "**" ) :
 			this.off( types, selector || "**", fn );
+	},
+
+	hover: function( fnOver, fnOut ) {
+		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
 	}
 } );
 
+jQuery.each(
+	( "blur focus focusin focusout resize scroll click dblclick " +
+	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
+	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
+	function( _i, name ) {
+
+		// Handle event binding
+		jQuery.fn[ name ] = function( data, fn ) {
+			return arguments.length > 0 ?
+				this.on( name, null, data, fn ) :
+				this.trigger( name );
+		};
+	}
+);
+
+
+
+
+// Support: Android <=4.0 only
+// Make sure we trim BOM and NBSP
+var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
+
 // Bind a function to a context, optionally partially applying any
 // arguments.
 // jQuery.proxy is deprecated to promote standards (specifically Function#bind)
@@ -10306,6 +10815,11 @@ jQuery.isNumeric = function( obj ) {
 		!isNaN( obj - parseFloat( obj ) );
 };
 
+jQuery.trim = function( text ) {
+	return text == null ?
+		"" :
+		( text + "" ).replace( rtrim, "" );
+};
 
 
 
@@ -10354,7 +10868,7 @@ jQuery.noConflict = function( deep ) {
 // Expose jQuery and $ identifiers, even in AMD
 // (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
 // and CommonJS for browser emulators (#13566)
-if ( !noGlobal ) {
+if ( typeof noGlobal === "undefined" ) {
 	window.jQuery = window.$ = jQuery;
 }
 
diff --git a/doc/_static/language_data.js b/doc/_static/language_data.js
index 5266fb1..863704b 100644
--- a/doc/_static/language_data.js
+++ b/doc/_static/language_data.js
@@ -5,7 +5,7 @@
  * This script contains the language-specific data used by searchtools.js,
  * namely the list of stopwords, stemmer, scorer and splitter.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -13,7 +13,8 @@
 var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"];
 
 
-/* Non-minified version JS is _stemmer.js if file is provided */ 
+/* Non-minified version is copied as a separate JS file, is available */
+
 /**
  * Porter Stemmer
  */
@@ -199,7 +200,6 @@ var Stemmer = function() {
 
 
 
-
 var splitChars = (function() {
     var result = {};
     var singles = [96, 180, 187, 191, 215, 247, 749, 885, 903, 907, 909, 930, 1014, 1648,
diff --git a/doc/_static/pygments.css b/doc/_static/pygments.css
index 20c4814..691aeb8 100644
--- a/doc/_static/pygments.css
+++ b/doc/_static/pygments.css
@@ -1,5 +1,10 @@
+pre { line-height: 125%; }
+td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
+span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
 .highlight .hll { background-color: #ffffcc }
-.highlight  { background: #eeffcc; }
+.highlight { background: #eeffcc; }
 .highlight .c { color: #408090; font-style: italic } /* Comment */
 .highlight .err { border: 1px solid #FF0000 } /* Error */
 .highlight .k { color: #007020; font-weight: bold } /* Keyword */
diff --git a/doc/_static/searchtools.js b/doc/_static/searchtools.js
index 5ff3180..7dbc787 100644
--- a/doc/_static/searchtools.js
+++ b/doc/_static/searchtools.js
@@ -4,7 +4,7 @@
  *
  * Sphinx JavaScript utilities for the full-text search.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -36,8 +36,10 @@ if (!Scorer) {
 
     // query found in title
     title: 15,
+    partialTitle: 7,
     // query found in terms
-    term: 5
+    term: 5,
+    partialTerm: 2
   };
 }
 
@@ -56,6 +58,19 @@ var Search = {
   _queued_query : null,
   _pulse_status : -1,
 
+  htmlToText : function(htmlString) {
+      var virtualDocument = document.implementation.createHTMLDocument('virtual');
+      var htmlElement = $(htmlString, virtualDocument);
+      htmlElement.find('.headerlink').remove();
+      docContent = htmlElement.find('[role=main]')[0];
+      if(docContent === undefined) {
+          console.warn("Content block not found. Sphinx search tries to obtain it " +
+                       "via '[role=main]'. Could you check your theme or template.");
+          return "";
+      }
+      return docContent.textContent || docContent.innerText;
+  },
+
   init : function() {
       var params = $.getQueryParameters();
       if (params.q) {
@@ -120,7 +135,7 @@ var Search = {
     this.out = $('#search-results');
     this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
     this.dots = $('<span></span>').appendTo(this.title);
-    this.status = $('<p style="display: none"></p>').appendTo(this.out);
+    this.status = $('<p class="search-summary">&nbsp;</p>').appendTo(this.out);
     this.output = $('<ul class="search"/>').appendTo(this.out);
 
     $('#search-progress').text(_('Preparing search...'));
@@ -151,8 +166,7 @@ var Search = {
           objectterms.push(tmp[i].toLowerCase());
       }
 
-      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
-          tmp[i] === "") {
+      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i] === "") {
         // skip this "word"
         continue;
       }
@@ -234,8 +248,10 @@ var Search = {
       // results left, load the summary and display it
       if (results.length) {
         var item = results.pop();
-        var listItem = $('<li style="display:none"></li>');
-        if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
+        var listItem = $('<li></li>');
+        var requestUrl = "";
+        var linkUrl = "";
+        if (DOCUMENTATION_OPTIONS.BUILDER === 'dirhtml') {
           // dirhtml builder
           var dirname = item[0] + '/';
           if (dirname.match(/\/index\/$/)) {
@@ -243,44 +259,45 @@ var Search = {
           } else if (dirname == 'index/') {
             dirname = '';
           }
-          listItem.append($('<a/>').attr('href',
-            DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
-            highlightstring + item[2]).html(item[1]));
+          requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + dirname;
+          linkUrl = requestUrl;
+
         } else {
           // normal html builders
-          listItem.append($('<a/>').attr('href',
-            item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
-            highlightstring + item[2]).html(item[1]));
+          requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX;
+          linkUrl = item[0] + DOCUMENTATION_OPTIONS.LINK_SUFFIX;
         }
+        listItem.append($('<a/>').attr('href',
+            linkUrl +
+            highlightstring + item[2]).html(item[1]));
         if (item[3]) {
           listItem.append($('<span> (' + item[3] + ')</span>'));
           Search.output.append(listItem);
-          listItem.slideDown(5, function() {
+          setTimeout(function() {
             displayNextItem();
-          });
+          }, 5);
         } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
-          var suffix = DOCUMENTATION_OPTIONS.SOURCELINK_SUFFIX;
-          if (suffix === undefined) {
-            suffix = '.txt';
-          }
-          $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' + item[5] + (item[5].slice(-suffix.length) === suffix ? '' : suffix),
+          $.ajax({url: requestUrl,
                   dataType: "text",
                   complete: function(jqxhr, textstatus) {
                     var data = jqxhr.responseText;
                     if (data !== '' && data !== undefined) {
-                      listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
+                      var summary = Search.makeSearchSummary(data, searchterms, hlterms);
+                      if (summary) {
+                        listItem.append(summary);
+                      }
                     }
                     Search.output.append(listItem);
-                    listItem.slideDown(5, function() {
+                    setTimeout(function() {
                       displayNextItem();
-                    });
+                    }, 5);
                   }});
         } else {
           // no source available, just display title
           Search.output.append(listItem);
-          listItem.slideDown(5, function() {
+          setTimeout(function() {
             displayNextItem();
-          });
+          }, 5);
         }
       }
       // search finished, update title and status message
@@ -311,20 +328,25 @@ var Search = {
     var results = [];
 
     for (var prefix in objects) {
-      for (var name in objects[prefix]) {
+      if (!(objects[prefix] instanceof Array)) {
+        objects[prefix] = Object.entries(objects[prefix]).map(([name, match]) => [...match, name]);
+      }
+      for (var iMatch = 0; iMatch != objects[prefix].length; ++iMatch) {
+        var match = objects[prefix][iMatch];
+        var name = match[4];
         var fullname = (prefix ? prefix + '.' : '') + name;
-        if (fullname.toLowerCase().indexOf(object) > -1) {
+        var fullnameLower = fullname.toLowerCase()
+        if (fullnameLower.indexOf(object) > -1) {
           var score = 0;
-          var parts = fullname.split('.');
+          var parts = fullnameLower.split('.');
           // check for different match types: exact matches of full name or
           // "last name" (i.e. last dotted part)
-          if (fullname == object || parts[parts.length - 1] == object) {
+          if (fullnameLower == object || parts[parts.length - 1] == object) {
             score += Scorer.objNameMatch;
           // matches in last name
           } else if (parts[parts.length - 1].indexOf(object) > -1) {
             score += Scorer.objPartialMatch;
           }
-          var match = objects[prefix][name];
           var objname = objnames[match[1]][2];
           var title = titles[match[0]];
           // If more than one term searched for, we require other words to be
@@ -365,6 +387,13 @@ var Search = {
   },
 
   /**
+   * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+   */
+  escapeRegExp : function(string) {
+    return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
+  },
+
+  /**
    * search for full-text terms in the index
    */
   performTermsSearch : function(searchterms, excluded, terms, titleterms) {
@@ -385,6 +414,20 @@ var Search = {
         {files: terms[word], score: Scorer.term},
         {files: titleterms[word], score: Scorer.title}
       ];
+      // add support for partial matches
+      if (word.length > 2) {
+        var word_regex = this.escapeRegExp(word);
+        for (var w in terms) {
+          if (w.match(word_regex) && !terms[word]) {
+            _o.push({files: terms[w], score: Scorer.partialTerm})
+          }
+        }
+        for (var w in titleterms) {
+          if (w.match(word_regex) && !titleterms[word]) {
+              _o.push({files: titleterms[w], score: Scorer.partialTitle})
+          }
+        }
+      }
 
       // no match but word was a required one
       if ($u.every(_o, function(o){return o.files === undefined;})) {
@@ -404,7 +447,7 @@ var Search = {
         for (j = 0; j < _files.length; j++) {
           file = _files[j];
           if (!(file in scoreMap))
-            scoreMap[file] = {}
+            scoreMap[file] = {};
           scoreMap[file][word] = o.score;
         }
       });
@@ -412,7 +455,7 @@ var Search = {
       // create the mapping
       for (j = 0; j < files.length; j++) {
         file = files[j];
-        if (file in fileMap)
+        if (file in fileMap && fileMap[file].indexOf(word) === -1)
           fileMap[file].push(word);
         else
           fileMap[file] = [word];
@@ -424,8 +467,12 @@ var Search = {
       var valid = true;
 
       // check if all requirements are matched
-      if (fileMap[file].length != searchterms.length)
-          continue;
+      var filteredTermCount = // as search terms with length < 3 are discarded: ignore
+        searchterms.filter(function(term){return term.length > 2}).length
+      if (
+        fileMap[file].length != searchterms.length &&
+        fileMap[file].length != filteredTermCount
+      ) continue;
 
       // ensure that none of the excluded terms is in the search result
       for (i = 0; i < excluded.length; i++) {
@@ -456,7 +503,11 @@ var Search = {
    * words. the first one is used to find the occurrence, the
    * latter for highlighting it.
    */
-  makeSearchSummary : function(text, keywords, hlwords) {
+  makeSearchSummary : function(htmlText, keywords, hlwords) {
+    var text = Search.htmlToText(htmlText);
+    if (text == "") {
+      return null;
+    }
     var textLower = text.toLowerCase();
     var start = 0;
     $.each(keywords, function() {
@@ -468,7 +519,7 @@ var Search = {
     var excerpt = ((start > 0) ? '...' : '') +
       $.trim(text.substr(start, 240)) +
       ((start + 240 - text.length) ? '...' : '');
-    var rv = $('<div class="context"></div>').text(excerpt);
+    var rv = $('<p class="context"></p>').text(excerpt);
     $.each(hlwords, function() {
       rv = rv.highlightText(this, 'highlighted');
     });
diff --git a/doc/_static/sidebar.js b/doc/_static/sidebar.js
index 686ca39..599639f 100644
--- a/doc/_static/sidebar.js
+++ b/doc/_static/sidebar.js
@@ -16,7 +16,7 @@
  * Once the browser is closed the cookie is deleted and the position
  * reset to the default (expanded).
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
diff --git a/doc/_static/underscore.js b/doc/_static/underscore.js
index 709ae8e..b812b35 100644
--- a/doc/_static/underscore.js
+++ b/doc/_static/underscore.js
@@ -1,24 +1,28 @@
-//     Underscore.js 1.9.1
-//     http://underscorejs.org
-//     (c) 2009-2018 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-//     Underscore may be freely distributed under the MIT license.
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define('underscore', factory) :
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, (function () {
+    var current = global._;
+    var exports = global._ = factory();
+    exports.noConflict = function () { global._ = current; return exports; };
+  }()));
+}(this, (function () {
+  //     Underscore.js 1.13.2
+  //     https://underscorejs.org
+  //     (c) 2009-2021 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors
+  //     Underscore may be freely distributed under the MIT license.
 
-(function() {
-
-  // Baseline setup
-  // --------------
+  // Current version.
+  var VERSION = '1.13.2';
 
   // Establish the root object, `window` (`self`) in the browser, `global`
   // on the server, or `this` in some virtual machines. We use `self`
   // instead of `window` for `WebWorker` support.
   var root = typeof self == 'object' && self.self === self && self ||
             typeof global == 'object' && global.global === global && global ||
-            this ||
+            Function('return this')() ||
             {};
 
-  // Save the previous value of the `_` variable.
-  var previousUnderscore = root._;
-
   // Save bytes in the minified (but not gzipped) version:
   var ArrayProto = Array.prototype, ObjProto = Object.prototype;
   var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;
@@ -29,87 +33,35 @@
       toString = ObjProto.toString,
       hasOwnProperty = ObjProto.hasOwnProperty;
 
-  // All **ECMAScript 5** native function implementations that we hope to use
+  // Modern feature detection.
+  var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined',
+      supportsDataView = typeof DataView !== 'undefined';
+
+  // All **ECMAScript 5+** native function implementations that we hope to use
   // are declared here.
   var nativeIsArray = Array.isArray,
       nativeKeys = Object.keys,
-      nativeCreate = Object.create;
-
-  // Naked function reference for surrogate-prototype-swapping.
-  var Ctor = function(){};
-
-  // Create a safe reference to the Underscore object for use below.
-  var _ = function(obj) {
-    if (obj instanceof _) return obj;
-    if (!(this instanceof _)) return new _(obj);
-    this._wrapped = obj;
-  };
-
-  // Export the Underscore object for **Node.js**, with
-  // backwards-compatibility for their old module API. If we're in
-  // the browser, add `_` as a global object.
-  // (`nodeType` is checked to ensure that `module`
-  // and `exports` are not HTML elements.)
-  if (typeof exports != 'undefined' && !exports.nodeType) {
-    if (typeof module != 'undefined' && !module.nodeType && module.exports) {
-      exports = module.exports = _;
-    }
-    exports._ = _;
-  } else {
-    root._ = _;
-  }
-
-  // Current version.
-  _.VERSION = '1.9.1';
-
-  // Internal function that returns an efficient (for current engines) version
-  // of the passed-in callback, to be repeatedly applied in other Underscore
-  // functions.
-  var optimizeCb = function(func, context, argCount) {
-    if (context === void 0) return func;
-    switch (argCount == null ? 3 : argCount) {
-      case 1: return function(value) {
-        return func.call(context, value);
-      };
-      // The 2-argument case is omitted because we’re not using it.
-      case 3: return function(value, index, collection) {
-        return func.call(context, value, index, collection);
-      };
-      case 4: return function(accumulator, value, index, collection) {
-        return func.call(context, accumulator, value, index, collection);
-      };
-    }
-    return function() {
-      return func.apply(context, arguments);
-    };
-  };
+      nativeCreate = Object.create,
+      nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;
 
-  var builtinIteratee;
+  // Create references to these builtin functions because we override them.
+  var _isNaN = isNaN,
+      _isFinite = isFinite;
 
-  // An internal function to generate callbacks that can be applied to each
-  // element in a collection, returning the desired result — either `identity`,
-  // an arbitrary callback, a property matcher, or a property accessor.
-  var cb = function(value, context, argCount) {
-    if (_.iteratee !== builtinIteratee) return _.iteratee(value, context);
-    if (value == null) return _.identity;
-    if (_.isFunction(value)) return optimizeCb(value, context, argCount);
-    if (_.isObject(value) && !_.isArray(value)) return _.matcher(value);
-    return _.property(value);
-  };
+  // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
+  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
+  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
+    'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
 
-  // External wrapper for our callback generator. Users may customize
-  // `_.iteratee` if they want additional predicate/iteratee shorthand styles.
-  // This abstraction hides the internal-only argCount argument.
-  _.iteratee = builtinIteratee = function(value, context) {
-    return cb(value, context, Infinity);
-  };
+  // The largest integer that can be represented exactly.
+  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
 
   // Some functions take a variable number of arguments, or a few expected
   // arguments at the beginning and then a variable number of values to operate
   // on. This helper accumulates all remaining arguments past the function’s
   // argument length (or an explicit `startIndex`), into an array that becomes
   // the last argument. Similar to ES6’s "rest parameter".
-  var restArguments = function(func, startIndex) {
+  function restArguments(func, startIndex) {
     startIndex = startIndex == null ? func.length - 1 : +startIndex;
     return function() {
       var length = Math.max(arguments.length - startIndex, 0),
@@ -130,1067 +82,280 @@
       args[startIndex] = rest;
       return func.apply(this, args);
     };
-  };
-
-  // An internal function for creating a new object that inherits from another.
-  var baseCreate = function(prototype) {
-    if (!_.isObject(prototype)) return {};
-    if (nativeCreate) return nativeCreate(prototype);
-    Ctor.prototype = prototype;
-    var result = new Ctor;
-    Ctor.prototype = null;
-    return result;
-  };
-
-  var shallowProperty = function(key) {
-    return function(obj) {
-      return obj == null ? void 0 : obj[key];
-    };
-  };
-
-  var has = function(obj, path) {
-    return obj != null && hasOwnProperty.call(obj, path);
   }
 
-  var deepGet = function(obj, path) {
-    var length = path.length;
-    for (var i = 0; i < length; i++) {
-      if (obj == null) return void 0;
-      obj = obj[path[i]];
-    }
-    return length ? obj : void 0;
-  };
-
-  // Helper for collection methods to determine whether a collection
-  // should be iterated as an array or as an object.
-  // Related: http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
-  // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
-  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
-  var getLength = shallowProperty('length');
-  var isArrayLike = function(collection) {
-    var length = getLength(collection);
-    return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
-  };
+  // Is a given variable an object?
+  function isObject(obj) {
+    var type = typeof obj;
+    return type === 'function' || type === 'object' && !!obj;
+  }
 
-  // Collection Functions
-  // --------------------
+  // Is a given value equal to null?
+  function isNull(obj) {
+    return obj === null;
+  }
 
-  // The cornerstone, an `each` implementation, aka `forEach`.
-  // Handles raw objects in addition to array-likes. Treats all
-  // sparse array-likes as if they were dense.
-  _.each = _.forEach = function(obj, iteratee, context) {
-    iteratee = optimizeCb(iteratee, context);
-    var i, length;
-    if (isArrayLike(obj)) {
-      for (i = 0, length = obj.length; i < length; i++) {
-        iteratee(obj[i], i, obj);
-      }
-    } else {
-      var keys = _.keys(obj);
-      for (i = 0, length = keys.length; i < length; i++) {
-        iteratee(obj[keys[i]], keys[i], obj);
-      }
-    }
-    return obj;
-  };
+  // Is a given variable undefined?
+  function isUndefined(obj) {
+    return obj === void 0;
+  }
 
-  // Return the results of applying the iteratee to each element.
-  _.map = _.collect = function(obj, iteratee, context) {
-    iteratee = cb(iteratee, context);
-    var keys = !isArrayLike(obj) && _.keys(obj),
-        length = (keys || obj).length,
-        results = Array(length);
-    for (var index = 0; index < length; index++) {
-      var currentKey = keys ? keys[index] : index;
-      results[index] = iteratee(obj[currentKey], currentKey, obj);
-    }
-    return results;
-  };
+  // Is a given value a boolean?
+  function isBoolean(obj) {
+    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
+  }
 
-  // Create a reducing function iterating left or right.
-  var createReduce = function(dir) {
-    // Wrap code that reassigns argument variables in a separate function than
-    // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
-    var reducer = function(obj, iteratee, memo, initial) {
-      var keys = !isArrayLike(obj) && _.keys(obj),
-          length = (keys || obj).length,
-          index = dir > 0 ? 0 : length - 1;
-      if (!initial) {
-        memo = obj[keys ? keys[index] : index];
-        index += dir;
-      }
-      for (; index >= 0 && index < length; index += dir) {
-        var currentKey = keys ? keys[index] : index;
-        memo = iteratee(memo, obj[currentKey], currentKey, obj);
-      }
-      return memo;
-    };
+  // Is a given value a DOM element?
+  function isElement(obj) {
+    return !!(obj && obj.nodeType === 1);
+  }
 
-    return function(obj, iteratee, memo, context) {
-      var initial = arguments.length >= 3;
-      return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
+  // Internal function for creating a `toString`-based type tester.
+  function tagTester(name) {
+    var tag = '[object ' + name + ']';
+    return function(obj) {
+      return toString.call(obj) === tag;
     };
-  };
-
-  // **Reduce** builds up a single result from a list of values, aka `inject`,
-  // or `foldl`.
-  _.reduce = _.foldl = _.inject = createReduce(1);
-
-  // The right-associative version of reduce, also known as `foldr`.
-  _.reduceRight = _.foldr = createReduce(-1);
-
-  // Return the first value which passes a truth test. Aliased as `detect`.
-  _.find = _.detect = function(obj, predicate, context) {
-    var keyFinder = isArrayLike(obj) ? _.findIndex : _.findKey;
-    var key = keyFinder(obj, predicate, context);
-    if (key !== void 0 && key !== -1) return obj[key];
-  };
-
-  // Return all the elements that pass a truth test.
-  // Aliased as `select`.
-  _.filter = _.select = function(obj, predicate, context) {
-    var results = [];
-    predicate = cb(predicate, context);
-    _.each(obj, function(value, index, list) {
-      if (predicate(value, index, list)) results.push(value);
-    });
-    return results;
-  };
-
-  // Return all the elements for which a truth test fails.
-  _.reject = function(obj, predicate, context) {
-    return _.filter(obj, _.negate(cb(predicate)), context);
-  };
-
-  // Determine whether all of the elements match a truth test.
-  // Aliased as `all`.
-  _.every = _.all = function(obj, predicate, context) {
-    predicate = cb(predicate, context);
-    var keys = !isArrayLike(obj) && _.keys(obj),
-        length = (keys || obj).length;
-    for (var index = 0; index < length; index++) {
-      var currentKey = keys ? keys[index] : index;
-      if (!predicate(obj[currentKey], currentKey, obj)) return false;
-    }
-    return true;
-  };
-
-  // Determine if at least one element in the object matches a truth test.
-  // Aliased as `any`.
-  _.some = _.any = function(obj, predicate, context) {
-    predicate = cb(predicate, context);
-    var keys = !isArrayLike(obj) && _.keys(obj),
-        length = (keys || obj).length;
-    for (var index = 0; index < length; index++) {
-      var currentKey = keys ? keys[index] : index;
-      if (predicate(obj[currentKey], currentKey, obj)) return true;
-    }
-    return false;
-  };
-
-  // Determine if the array or object contains a given item (using `===`).
-  // Aliased as `includes` and `include`.
-  _.contains = _.includes = _.include = function(obj, item, fromIndex, guard) {
-    if (!isArrayLike(obj)) obj = _.values(obj);
-    if (typeof fromIndex != 'number' || guard) fromIndex = 0;
-    return _.indexOf(obj, item, fromIndex) >= 0;
-  };
+  }
 
-  // Invoke a method (with arguments) on every item in a collection.
-  _.invoke = restArguments(function(obj, path, args) {
-    var contextPath, func;
-    if (_.isFunction(path)) {
-      func = path;
-    } else if (_.isArray(path)) {
-      contextPath = path.slice(0, -1);
-      path = path[path.length - 1];
-    }
-    return _.map(obj, function(context) {
-      var method = func;
-      if (!method) {
-        if (contextPath && contextPath.length) {
-          context = deepGet(context, contextPath);
-        }
-        if (context == null) return void 0;
-        method = context[path];
-      }
-      return method == null ? method : method.apply(context, args);
-    });
-  });
+  var isString = tagTester('String');
 
-  // Convenience version of a common use case of `map`: fetching a property.
-  _.pluck = function(obj, key) {
-    return _.map(obj, _.property(key));
-  };
+  var isNumber = tagTester('Number');
 
-  // Convenience version of a common use case of `filter`: selecting only objects
-  // containing specific `key:value` pairs.
-  _.where = function(obj, attrs) {
-    return _.filter(obj, _.matcher(attrs));
-  };
+  var isDate = tagTester('Date');
 
-  // Convenience version of a common use case of `find`: getting the first object
-  // containing specific `key:value` pairs.
-  _.findWhere = function(obj, attrs) {
-    return _.find(obj, _.matcher(attrs));
-  };
+  var isRegExp = tagTester('RegExp');
 
-  // Return the maximum element (or element-based computation).
-  _.max = function(obj, iteratee, context) {
-    var result = -Infinity, lastComputed = -Infinity,
-        value, computed;
-    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
-      obj = isArrayLike(obj) ? obj : _.values(obj);
-      for (var i = 0, length = obj.length; i < length; i++) {
-        value = obj[i];
-        if (value != null && value > result) {
-          result = value;
-        }
-      }
-    } else {
-      iteratee = cb(iteratee, context);
-      _.each(obj, function(v, index, list) {
-        computed = iteratee(v, index, list);
-        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
-          result = v;
-          lastComputed = computed;
-        }
-      });
-    }
-    return result;
-  };
-
-  // Return the minimum element (or element-based computation).
-  _.min = function(obj, iteratee, context) {
-    var result = Infinity, lastComputed = Infinity,
-        value, computed;
-    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
-      obj = isArrayLike(obj) ? obj : _.values(obj);
-      for (var i = 0, length = obj.length; i < length; i++) {
-        value = obj[i];
-        if (value != null && value < result) {
-          result = value;
-        }
-      }
-    } else {
-      iteratee = cb(iteratee, context);
-      _.each(obj, function(v, index, list) {
-        computed = iteratee(v, index, list);
-        if (computed < lastComputed || computed === Infinity && result === Infinity) {
-          result = v;
-          lastComputed = computed;
-        }
-      });
-    }
-    return result;
-  };
+  var isError = tagTester('Error');
 
-  // Shuffle a collection.
-  _.shuffle = function(obj) {
-    return _.sample(obj, Infinity);
-  };
+  var isSymbol = tagTester('Symbol');
 
-  // Sample **n** random values from a collection using the modern version of the
-  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
-  // If **n** is not specified, returns a single random element.
-  // The internal `guard` argument allows it to work with `map`.
-  _.sample = function(obj, n, guard) {
-    if (n == null || guard) {
-      if (!isArrayLike(obj)) obj = _.values(obj);
-      return obj[_.random(obj.length - 1)];
-    }
-    var sample = isArrayLike(obj) ? _.clone(obj) : _.values(obj);
-    var length = getLength(sample);
-    n = Math.max(Math.min(n, length), 0);
-    var last = length - 1;
-    for (var index = 0; index < n; index++) {
-      var rand = _.random(index, last);
-      var temp = sample[index];
-      sample[index] = sample[rand];
-      sample[rand] = temp;
-    }
-    return sample.slice(0, n);
-  };
+  var isArrayBuffer = tagTester('ArrayBuffer');
 
-  // Sort the object's values by a criterion produced by an iteratee.
-  _.sortBy = function(obj, iteratee, context) {
-    var index = 0;
-    iteratee = cb(iteratee, context);
-    return _.pluck(_.map(obj, function(value, key, list) {
-      return {
-        value: value,
-        index: index++,
-        criteria: iteratee(value, key, list)
-      };
-    }).sort(function(left, right) {
-      var a = left.criteria;
-      var b = right.criteria;
-      if (a !== b) {
-        if (a > b || a === void 0) return 1;
-        if (a < b || b === void 0) return -1;
-      }
-      return left.index - right.index;
-    }), 'value');
-  };
+  var isFunction = tagTester('Function');
 
-  // An internal function used for aggregate "group by" operations.
-  var group = function(behavior, partition) {
-    return function(obj, iteratee, context) {
-      var result = partition ? [[], []] : {};
-      iteratee = cb(iteratee, context);
-      _.each(obj, function(value, index) {
-        var key = iteratee(value, index, obj);
-        behavior(result, value, key);
-      });
-      return result;
+  // Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old
+  // v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
+  var nodelist = root.document && root.document.childNodes;
+  if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
+    isFunction = function(obj) {
+      return typeof obj == 'function' || false;
     };
-  };
-
-  // Groups the object's values by a criterion. Pass either a string attribute
-  // to group by, or a function that returns the criterion.
-  _.groupBy = group(function(result, value, key) {
-    if (has(result, key)) result[key].push(value); else result[key] = [value];
-  });
-
-  // Indexes the object's values by a criterion, similar to `groupBy`, but for
-  // when you know that your index values will be unique.
-  _.indexBy = group(function(result, value, key) {
-    result[key] = value;
-  });
-
-  // Counts instances of an object that group by a certain criterion. Pass
-  // either a string attribute to count by, or a function that returns the
-  // criterion.
-  _.countBy = group(function(result, value, key) {
-    if (has(result, key)) result[key]++; else result[key] = 1;
-  });
-
-  var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
-  // Safely create a real, live array from anything iterable.
-  _.toArray = function(obj) {
-    if (!obj) return [];
-    if (_.isArray(obj)) return slice.call(obj);
-    if (_.isString(obj)) {
-      // Keep surrogate pair characters together
-      return obj.match(reStrSymbol);
-    }
-    if (isArrayLike(obj)) return _.map(obj, _.identity);
-    return _.values(obj);
-  };
-
-  // Return the number of elements in an object.
-  _.size = function(obj) {
-    if (obj == null) return 0;
-    return isArrayLike(obj) ? obj.length : _.keys(obj).length;
-  };
-
-  // Split a collection into two arrays: one whose elements all satisfy the given
-  // predicate, and one whose elements all do not satisfy the predicate.
-  _.partition = group(function(result, value, pass) {
-    result[pass ? 0 : 1].push(value);
-  }, true);
-
-  // Array Functions
-  // ---------------
-
-  // Get the first element of an array. Passing **n** will return the first N
-  // values in the array. Aliased as `head` and `take`. The **guard** check
-  // allows it to work with `_.map`.
-  _.first = _.head = _.take = function(array, n, guard) {
-    if (array == null || array.length < 1) return n == null ? void 0 : [];
-    if (n == null || guard) return array[0];
-    return _.initial(array, array.length - n);
-  };
-
-  // Returns everything but the last entry of the array. Especially useful on
-  // the arguments object. Passing **n** will return all the values in
-  // the array, excluding the last N.
-  _.initial = function(array, n, guard) {
-    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
-  };
-
-  // Get the last element of an array. Passing **n** will return the last N
-  // values in the array.
-  _.last = function(array, n, guard) {
-    if (array == null || array.length < 1) return n == null ? void 0 : [];
-    if (n == null || guard) return array[array.length - 1];
-    return _.rest(array, Math.max(0, array.length - n));
-  };
-
-  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
-  // Especially useful on the arguments object. Passing an **n** will return
-  // the rest N values in the array.
-  _.rest = _.tail = _.drop = function(array, n, guard) {
-    return slice.call(array, n == null || guard ? 1 : n);
-  };
-
-  // Trim out all falsy values from an array.
-  _.compact = function(array) {
-    return _.filter(array, Boolean);
-  };
-
-  // Internal implementation of a recursive `flatten` function.
-  var flatten = function(input, shallow, strict, output) {
-    output = output || [];
-    var idx = output.length;
-    for (var i = 0, length = getLength(input); i < length; i++) {
-      var value = input[i];
-      if (isArrayLike(value) && (_.isArray(value) || _.isArguments(value))) {
-        // Flatten current level of array or arguments object.
-        if (shallow) {
-          var j = 0, len = value.length;
-          while (j < len) output[idx++] = value[j++];
-        } else {
-          flatten(value, shallow, strict, output);
-          idx = output.length;
-        }
-      } else if (!strict) {
-        output[idx++] = value;
-      }
-    }
-    return output;
-  };
-
-  // Flatten out an array, either recursively (by default), or just one level.
-  _.flatten = function(array, shallow) {
-    return flatten(array, shallow, false);
-  };
-
-  // Return a version of the array that does not contain the specified value(s).
-  _.without = restArguments(function(array, otherArrays) {
-    return _.difference(array, otherArrays);
-  });
-
-  // Produce a duplicate-free version of the array. If the array has already
-  // been sorted, you have the option of using a faster algorithm.
-  // The faster algorithm will not work with an iteratee if the iteratee
-  // is not a one-to-one function, so providing an iteratee will disable
-  // the faster algorithm.
-  // Aliased as `unique`.
-  _.uniq = _.unique = function(array, isSorted, iteratee, context) {
-    if (!_.isBoolean(isSorted)) {
-      context = iteratee;
-      iteratee = isSorted;
-      isSorted = false;
-    }
-    if (iteratee != null) iteratee = cb(iteratee, context);
-    var result = [];
-    var seen = [];
-    for (var i = 0, length = getLength(array); i < length; i++) {
-      var value = array[i],
-          computed = iteratee ? iteratee(value, i, array) : value;
-      if (isSorted && !iteratee) {
-        if (!i || seen !== computed) result.push(value);
-        seen = computed;
-      } else if (iteratee) {
-        if (!_.contains(seen, computed)) {
-          seen.push(computed);
-          result.push(value);
-        }
-      } else if (!_.contains(result, value)) {
-        result.push(value);
-      }
-    }
-    return result;
-  };
-
-  // Produce an array that contains the union: each distinct element from all of
-  // the passed-in arrays.
-  _.union = restArguments(function(arrays) {
-    return _.uniq(flatten(arrays, true, true));
-  });
-
-  // Produce an array that contains every item shared between all the
-  // passed-in arrays.
-  _.intersection = function(array) {
-    var result = [];
-    var argsLength = arguments.length;
-    for (var i = 0, length = getLength(array); i < length; i++) {
-      var item = array[i];
-      if (_.contains(result, item)) continue;
-      var j;
-      for (j = 1; j < argsLength; j++) {
-        if (!_.contains(arguments[j], item)) break;
-      }
-      if (j === argsLength) result.push(item);
-    }
-    return result;
-  };
-
-  // Take the difference between one array and a number of other arrays.
-  // Only the elements present in just the first array will remain.
-  _.difference = restArguments(function(array, rest) {
-    rest = flatten(rest, true, true);
-    return _.filter(array, function(value){
-      return !_.contains(rest, value);
-    });
-  });
-
-  // Complement of _.zip. Unzip accepts an array of arrays and groups
-  // each array's elements on shared indices.
-  _.unzip = function(array) {
-    var length = array && _.max(array, getLength).length || 0;
-    var result = Array(length);
-
-    for (var index = 0; index < length; index++) {
-      result[index] = _.pluck(array, index);
-    }
-    return result;
-  };
-
-  // Zip together multiple lists into a single array -- elements that share
-  // an index go together.
-  _.zip = restArguments(_.unzip);
-
-  // Converts lists into objects. Pass either a single array of `[key, value]`
-  // pairs, or two parallel arrays of the same length -- one of keys, and one of
-  // the corresponding values. Passing by pairs is the reverse of _.pairs.
-  _.object = function(list, values) {
-    var result = {};
-    for (var i = 0, length = getLength(list); i < length; i++) {
-      if (values) {
-        result[list[i]] = values[i];
-      } else {
-        result[list[i][0]] = list[i][1];
-      }
-    }
-    return result;
-  };
+  }
 
-  // Generator function to create the findIndex and findLastIndex functions.
-  var createPredicateIndexFinder = function(dir) {
-    return function(array, predicate, context) {
-      predicate = cb(predicate, context);
-      var length = getLength(array);
-      var index = dir > 0 ? 0 : length - 1;
-      for (; index >= 0 && index < length; index += dir) {
-        if (predicate(array[index], index, array)) return index;
-      }
-      return -1;
-    };
-  };
+  var isFunction$1 = isFunction;
 
-  // Returns the first index on an array-like that passes a predicate test.
-  _.findIndex = createPredicateIndexFinder(1);
-  _.findLastIndex = createPredicateIndexFinder(-1);
+  var hasObjectTag = tagTester('Object');
 
-  // Use a comparator function to figure out the smallest index at which
-  // an object should be inserted so as to maintain order. Uses binary search.
-  _.sortedIndex = function(array, obj, iteratee, context) {
-    iteratee = cb(iteratee, context, 1);
-    var value = iteratee(obj);
-    var low = 0, high = getLength(array);
-    while (low < high) {
-      var mid = Math.floor((low + high) / 2);
-      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
-    }
-    return low;
-  };
+  // In IE 10 - Edge 13, `DataView` has string tag `'[object Object]'`.
+  // In IE 11, the most common among them, this problem also applies to
+  // `Map`, `WeakMap` and `Set`.
+  var hasStringTagBug = (
+        supportsDataView && hasObjectTag(new DataView(new ArrayBuffer(8)))
+      ),
+      isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map));
 
-  // Generator function to create the indexOf and lastIndexOf functions.
-  var createIndexFinder = function(dir, predicateFind, sortedIndex) {
-    return function(array, item, idx) {
-      var i = 0, length = getLength(array);
-      if (typeof idx == 'number') {
-        if (dir > 0) {
-          i = idx >= 0 ? idx : Math.max(idx + length, i);
-        } else {
-          length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
-        }
-      } else if (sortedIndex && idx && length) {
-        idx = sortedIndex(array, item);
-        return array[idx] === item ? idx : -1;
-      }
-      if (item !== item) {
-        idx = predicateFind(slice.call(array, i, length), _.isNaN);
-        return idx >= 0 ? idx + i : -1;
-      }
-      for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
-        if (array[idx] === item) return idx;
-      }
-      return -1;
-    };
-  };
+  var isDataView = tagTester('DataView');
 
-  // Return the position of the first occurrence of an item in an array,
-  // or -1 if the item is not included in the array.
-  // If the array is large and already in sort order, pass `true`
-  // for **isSorted** to use binary search.
-  _.indexOf = createIndexFinder(1, _.findIndex, _.sortedIndex);
-  _.lastIndexOf = createIndexFinder(-1, _.findLastIndex);
+  // In IE 10 - Edge 13, we need a different heuristic
+  // to determine whether an object is a `DataView`.
+  function ie10IsDataView(obj) {
+    return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer);
+  }
 
-  // Generate an integer Array containing an arithmetic progression. A port of
-  // the native Python `range()` function. See
-  // [the Python documentation](http://docs.python.org/library/functions.html#range).
-  _.range = function(start, stop, step) {
-    if (stop == null) {
-      stop = start || 0;
-      start = 0;
-    }
-    if (!step) {
-      step = stop < start ? -1 : 1;
-    }
+  var isDataView$1 = (hasStringTagBug ? ie10IsDataView : isDataView);
 
-    var length = Math.max(Math.ceil((stop - start) / step), 0);
-    var range = Array(length);
+  // Is a given value an array?
+  // Delegates to ECMA5's native `Array.isArray`.
+  var isArray = nativeIsArray || tagTester('Array');
 
-    for (var idx = 0; idx < length; idx++, start += step) {
-      range[idx] = start;
-    }
+  // Internal function to check whether `key` is an own property name of `obj`.
+  function has$1(obj, key) {
+    return obj != null && hasOwnProperty.call(obj, key);
+  }
 
-    return range;
-  };
+  var isArguments = tagTester('Arguments');
 
-  // Chunk a single array into multiple arrays, each containing `count` or fewer
-  // items.
-  _.chunk = function(array, count) {
-    if (count == null || count < 1) return [];
-    var result = [];
-    var i = 0, length = array.length;
-    while (i < length) {
-      result.push(slice.call(array, i, i += count));
+  // Define a fallback version of the method in browsers (ahem, IE < 9), where
+  // there isn't any inspectable "Arguments" type.
+  (function() {
+    if (!isArguments(arguments)) {
+      isArguments = function(obj) {
+        return has$1(obj, 'callee');
+      };
     }
-    return result;
-  };
+  }());
 
-  // Function (ahem) Functions
-  // ------------------
+  var isArguments$1 = isArguments;
 
-  // Determines whether to execute a function as a constructor
-  // or a normal function with the provided arguments.
-  var executeBound = function(sourceFunc, boundFunc, context, callingContext, args) {
-    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
-    var self = baseCreate(sourceFunc.prototype);
-    var result = sourceFunc.apply(self, args);
-    if (_.isObject(result)) return result;
-    return self;
-  };
+  // Is a given object a finite number?
+  function isFinite$1(obj) {
+    return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj));
+  }
 
-  // Create a function bound to a given object (assigning `this`, and arguments,
-  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
-  // available.
-  _.bind = restArguments(function(func, context, args) {
-    if (!_.isFunction(func)) throw new TypeError('Bind must be called on a function');
-    var bound = restArguments(function(callArgs) {
-      return executeBound(func, bound, context, this, args.concat(callArgs));
-    });
-    return bound;
-  });
+  // Is the given value `NaN`?
+  function isNaN$1(obj) {
+    return isNumber(obj) && _isNaN(obj);
+  }
 
-  // Partially apply a function by creating a version that has had some of its
-  // arguments pre-filled, without changing its dynamic `this` context. _ acts
-  // as a placeholder by default, allowing any combination of arguments to be
-  // pre-filled. Set `_.partial.placeholder` for a custom placeholder argument.
-  _.partial = restArguments(function(func, boundArgs) {
-    var placeholder = _.partial.placeholder;
-    var bound = function() {
-      var position = 0, length = boundArgs.length;
-      var args = Array(length);
-      for (var i = 0; i < length; i++) {
-        args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
-      }
-      while (position < arguments.length) args.push(arguments[position++]);
-      return executeBound(func, bound, this, this, args);
+  // Predicate-generating function. Often useful outside of Underscore.
+  function constant(value) {
+    return function() {
+      return value;
     };
-    return bound;
-  });
-
-  _.partial.placeholder = _;
+  }
 
-  // Bind a number of an object's methods to that object. Remaining arguments
-  // are the method names to be bound. Useful for ensuring that all callbacks
-  // defined on an object belong to it.
-  _.bindAll = restArguments(function(obj, keys) {
-    keys = flatten(keys, false, false);
-    var index = keys.length;
-    if (index < 1) throw new Error('bindAll must be passed function names');
-    while (index--) {
-      var key = keys[index];
-      obj[key] = _.bind(obj[key], obj);
+  // Common internal logic for `isArrayLike` and `isBufferLike`.
+  function createSizePropertyCheck(getSizeProperty) {
+    return function(collection) {
+      var sizeProperty = getSizeProperty(collection);
+      return typeof sizeProperty == 'number' && sizeProperty >= 0 && sizeProperty <= MAX_ARRAY_INDEX;
     }
-  });
-
-  // Memoize an expensive function by storing its results.
-  _.memoize = function(func, hasher) {
-    var memoize = function(key) {
-      var cache = memoize.cache;
-      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
-      if (!has(cache, address)) cache[address] = func.apply(this, arguments);
-      return cache[address];
-    };
-    memoize.cache = {};
-    return memoize;
-  };
-
-  // Delays a function for the given number of milliseconds, and then calls
-  // it with the arguments supplied.
-  _.delay = restArguments(function(func, wait, args) {
-    return setTimeout(function() {
-      return func.apply(null, args);
-    }, wait);
-  });
-
-  // Defers a function, scheduling it to run after the current call stack has
-  // cleared.
-  _.defer = _.partial(_.delay, _, 1);
-
-  // Returns a function, that, when invoked, will only be triggered at most once
-  // during a given window of time. Normally, the throttled function will run
-  // as much as it can, without ever going more than once per `wait` duration;
-  // but if you'd like to disable the execution on the leading edge, pass
-  // `{leading: false}`. To disable execution on the trailing edge, ditto.
-  _.throttle = function(func, wait, options) {
-    var timeout, context, args, result;
-    var previous = 0;
-    if (!options) options = {};
-
-    var later = function() {
-      previous = options.leading === false ? 0 : _.now();
-      timeout = null;
-      result = func.apply(context, args);
-      if (!timeout) context = args = null;
-    };
-
-    var throttled = function() {
-      var now = _.now();
-      if (!previous && options.leading === false) previous = now;
-      var remaining = wait - (now - previous);
-      context = this;
-      args = arguments;
-      if (remaining <= 0 || remaining > wait) {
-        if (timeout) {
-          clearTimeout(timeout);
-          timeout = null;
-        }
-        previous = now;
-        result = func.apply(context, args);
-        if (!timeout) context = args = null;
-      } else if (!timeout && options.trailing !== false) {
-        timeout = setTimeout(later, remaining);
-      }
-      return result;
-    };
-
-    throttled.cancel = function() {
-      clearTimeout(timeout);
-      previous = 0;
-      timeout = context = args = null;
-    };
-
-    return throttled;
-  };
-
-  // Returns a function, that, as long as it continues to be invoked, will not
-  // be triggered. The function will be called after it stops being called for
-  // N milliseconds. If `immediate` is passed, trigger the function on the
-  // leading edge, instead of the trailing.
-  _.debounce = function(func, wait, immediate) {
-    var timeout, result;
+  }
 
-    var later = function(context, args) {
-      timeout = null;
-      if (args) result = func.apply(context, args);
+  // Internal helper to generate a function to obtain property `key` from `obj`.
+  function shallowProperty(key) {
+    return function(obj) {
+      return obj == null ? void 0 : obj[key];
     };
+  }
 
-    var debounced = restArguments(function(args) {
-      if (timeout) clearTimeout(timeout);
-      if (immediate) {
-        var callNow = !timeout;
-        timeout = setTimeout(later, wait);
-        if (callNow) result = func.apply(this, args);
-      } else {
-        timeout = _.delay(later, wait, this, args);
-      }
-
-      return result;
-    });
+  // Internal helper to obtain the `byteLength` property of an object.
+  var getByteLength = shallowProperty('byteLength');
 
-    debounced.cancel = function() {
-      clearTimeout(timeout);
-      timeout = null;
-    };
-
-    return debounced;
-  };
+  // Internal helper to determine whether we should spend extensive checks against
+  // `ArrayBuffer` et al.
+  var isBufferLike = createSizePropertyCheck(getByteLength);
 
-  // Returns the first function passed as an argument to the second,
-  // allowing you to adjust arguments, run code before and after, and
-  // conditionally execute the original function.
-  _.wrap = function(func, wrapper) {
-    return _.partial(wrapper, func);
-  };
-
-  // Returns a negated version of the passed-in predicate.
-  _.negate = function(predicate) {
-    return function() {
-      return !predicate.apply(this, arguments);
-    };
-  };
+  // Is a given value a typed array?
+  var typedArrayPattern = /\[object ((I|Ui)nt(8|16|32)|Float(32|64)|Uint8Clamped|Big(I|Ui)nt64)Array\]/;
+  function isTypedArray(obj) {
+    // `ArrayBuffer.isView` is the most future-proof, so use it when available.
+    // Otherwise, fall back on the above regular expression.
+    return nativeIsView ? (nativeIsView(obj) && !isDataView$1(obj)) :
+                  isBufferLike(obj) && typedArrayPattern.test(toString.call(obj));
+  }
 
-  // Returns a function that is the composition of a list of functions, each
-  // consuming the return value of the function that follows.
-  _.compose = function() {
-    var args = arguments;
-    var start = args.length - 1;
-    return function() {
-      var i = start;
-      var result = args[start].apply(this, arguments);
-      while (i--) result = args[i].call(this, result);
-      return result;
-    };
-  };
+  var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false);
 
-  // Returns a function that will only be executed on and after the Nth call.
-  _.after = function(times, func) {
-    return function() {
-      if (--times < 1) {
-        return func.apply(this, arguments);
-      }
-    };
-  };
+  // Internal helper to obtain the `length` property of an object.
+  var getLength = shallowProperty('length');
 
-  // Returns a function that will only be executed up to (but not including) the Nth call.
-  _.before = function(times, func) {
-    var memo;
-    return function() {
-      if (--times > 0) {
-        memo = func.apply(this, arguments);
+  // Internal helper to create a simple lookup structure.
+  // `collectNonEnumProps` used to depend on `_.contains`, but this led to
+  // circular imports. `emulatedSet` is a one-off solution that only works for
+  // arrays of strings.
+  function emulatedSet(keys) {
+    var hash = {};
+    for (var l = keys.length, i = 0; i < l; ++i) hash[keys[i]] = true;
+    return {
+      contains: function(key) { return hash[key] === true; },
+      push: function(key) {
+        hash[key] = true;
+        return keys.push(key);
       }
-      if (times <= 1) func = null;
-      return memo;
     };
-  };
-
-  // Returns a function that will be executed at most one time, no matter how
-  // often you call it. Useful for lazy initialization.
-  _.once = _.partial(_.before, 2);
-
-  _.restArguments = restArguments;
-
-  // Object Functions
-  // ----------------
-
-  // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
-  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
-  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
-    'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
+  }
 
-  var collectNonEnumProps = function(obj, keys) {
+  // Internal helper. Checks `keys` for the presence of keys in IE < 9 that won't
+  // be iterated by `for key in ...` and thus missed. Extends `keys` in place if
+  // needed.
+  function collectNonEnumProps(obj, keys) {
+    keys = emulatedSet(keys);
     var nonEnumIdx = nonEnumerableProps.length;
     var constructor = obj.constructor;
-    var proto = _.isFunction(constructor) && constructor.prototype || ObjProto;
+    var proto = isFunction$1(constructor) && constructor.prototype || ObjProto;
 
     // Constructor is a special case.
     var prop = 'constructor';
-    if (has(obj, prop) && !_.contains(keys, prop)) keys.push(prop);
+    if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop);
 
     while (nonEnumIdx--) {
       prop = nonEnumerableProps[nonEnumIdx];
-      if (prop in obj && obj[prop] !== proto[prop] && !_.contains(keys, prop)) {
+      if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
         keys.push(prop);
       }
     }
-  };
+  }
 
   // Retrieve the names of an object's own properties.
   // Delegates to **ECMAScript 5**'s native `Object.keys`.
-  _.keys = function(obj) {
-    if (!_.isObject(obj)) return [];
+  function keys(obj) {
+    if (!isObject(obj)) return [];
     if (nativeKeys) return nativeKeys(obj);
     var keys = [];
-    for (var key in obj) if (has(obj, key)) keys.push(key);
-    // Ahem, IE < 9.
-    if (hasEnumBug) collectNonEnumProps(obj, keys);
-    return keys;
-  };
-
-  // Retrieve all the property names of an object.
-  _.allKeys = function(obj) {
-    if (!_.isObject(obj)) return [];
-    var keys = [];
-    for (var key in obj) keys.push(key);
+    for (var key in obj) if (has$1(obj, key)) keys.push(key);
     // Ahem, IE < 9.
     if (hasEnumBug) collectNonEnumProps(obj, keys);
     return keys;
-  };
-
-  // Retrieve the values of an object's properties.
-  _.values = function(obj) {
-    var keys = _.keys(obj);
-    var length = keys.length;
-    var values = Array(length);
-    for (var i = 0; i < length; i++) {
-      values[i] = obj[keys[i]];
-    }
-    return values;
-  };
+  }
 
-  // Returns the results of applying the iteratee to each element of the object.
-  // In contrast to _.map it returns an object.
-  _.mapObject = function(obj, iteratee, context) {
-    iteratee = cb(iteratee, context);
-    var keys = _.keys(obj),
-        length = keys.length,
-        results = {};
-    for (var index = 0; index < length; index++) {
-      var currentKey = keys[index];
-      results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
-    }
-    return results;
-  };
+  // Is a given array, string, or object empty?
+  // An "empty" object has no enumerable own-properties.
+  function isEmpty(obj) {
+    if (obj == null) return true;
+    // Skip the more expensive `toString`-based type checks if `obj` has no
+    // `.length`.
+    var length = getLength(obj);
+    if (typeof length == 'number' && (
+      isArray(obj) || isString(obj) || isArguments$1(obj)
+    )) return length === 0;
+    return getLength(keys(obj)) === 0;
+  }
 
-  // Convert an object into a list of `[key, value]` pairs.
-  // The opposite of _.object.
-  _.pairs = function(obj) {
-    var keys = _.keys(obj);
-    var length = keys.length;
-    var pairs = Array(length);
+  // Returns whether an object has a given set of `key:value` pairs.
+  function isMatch(object, attrs) {
+    var _keys = keys(attrs), length = _keys.length;
+    if (object == null) return !length;
+    var obj = Object(object);
     for (var i = 0; i < length; i++) {
-      pairs[i] = [keys[i], obj[keys[i]]];
-    }
-    return pairs;
-  };
-
-  // Invert the keys and values of an object. The values must be serializable.
-  _.invert = function(obj) {
-    var result = {};
-    var keys = _.keys(obj);
-    for (var i = 0, length = keys.length; i < length; i++) {
-      result[obj[keys[i]]] = keys[i];
-    }
-    return result;
-  };
-
-  // Return a sorted list of the function names available on the object.
-  // Aliased as `methods`.
-  _.functions = _.methods = function(obj) {
-    var names = [];
-    for (var key in obj) {
-      if (_.isFunction(obj[key])) names.push(key);
-    }
-    return names.sort();
-  };
-
-  // An internal function for creating assigner functions.
-  var createAssigner = function(keysFunc, defaults) {
-    return function(obj) {
-      var length = arguments.length;
-      if (defaults) obj = Object(obj);
-      if (length < 2 || obj == null) return obj;
-      for (var index = 1; index < length; index++) {
-        var source = arguments[index],
-            keys = keysFunc(source),
-            l = keys.length;
-        for (var i = 0; i < l; i++) {
-          var key = keys[i];
-          if (!defaults || obj[key] === void 0) obj[key] = source[key];
-        }
-      }
-      return obj;
-    };
-  };
-
-  // Extend a given object with all the properties in passed-in object(s).
-  _.extend = createAssigner(_.allKeys);
-
-  // Assigns a given object with all the own properties in the passed-in object(s).
-  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
-  _.extendOwn = _.assign = createAssigner(_.keys);
-
-  // Returns the first key on an object that passes a predicate test.
-  _.findKey = function(obj, predicate, context) {
-    predicate = cb(predicate, context);
-    var keys = _.keys(obj), key;
-    for (var i = 0, length = keys.length; i < length; i++) {
-      key = keys[i];
-      if (predicate(obj[key], key, obj)) return key;
-    }
-  };
-
-  // Internal pick helper function to determine if `obj` has key `key`.
-  var keyInObj = function(value, key, obj) {
-    return key in obj;
-  };
-
-  // Return a copy of the object only containing the whitelisted properties.
-  _.pick = restArguments(function(obj, keys) {
-    var result = {}, iteratee = keys[0];
-    if (obj == null) return result;
-    if (_.isFunction(iteratee)) {
-      if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
-      keys = _.allKeys(obj);
-    } else {
-      iteratee = keyInObj;
-      keys = flatten(keys, false, false);
-      obj = Object(obj);
-    }
-    for (var i = 0, length = keys.length; i < length; i++) {
-      var key = keys[i];
-      var value = obj[key];
-      if (iteratee(value, key, obj)) result[key] = value;
+      var key = _keys[i];
+      if (attrs[key] !== obj[key] || !(key in obj)) return false;
     }
-    return result;
-  });
+    return true;
+  }
 
-  // Return a copy of the object without the blacklisted properties.
-  _.omit = restArguments(function(obj, keys) {
-    var iteratee = keys[0], context;
-    if (_.isFunction(iteratee)) {
-      iteratee = _.negate(iteratee);
-      if (keys.length > 1) context = keys[1];
-    } else {
-      keys = _.map(flatten(keys, false, false), String);
-      iteratee = function(value, key) {
-        return !_.contains(keys, key);
-      };
-    }
-    return _.pick(obj, iteratee, context);
-  });
+  // If Underscore is called as a function, it returns a wrapped object that can
+  // be used OO-style. This wrapper holds altered versions of all functions added
+  // through `_.mixin`. Wrapped objects may be chained.
+  function _$1(obj) {
+    if (obj instanceof _$1) return obj;
+    if (!(this instanceof _$1)) return new _$1(obj);
+    this._wrapped = obj;
+  }
 
-  // Fill in a given object with default properties.
-  _.defaults = createAssigner(_.allKeys, true);
+  _$1.VERSION = VERSION;
 
-  // Creates an object that inherits from the given prototype object.
-  // If additional properties are provided then they will be added to the
-  // created object.
-  _.create = function(prototype, props) {
-    var result = baseCreate(prototype);
-    if (props) _.extendOwn(result, props);
-    return result;
+  // Extracts the result from a wrapped and chained object.
+  _$1.prototype.value = function() {
+    return this._wrapped;
   };
 
-  // Create a (shallow-cloned) duplicate of an object.
-  _.clone = function(obj) {
-    if (!_.isObject(obj)) return obj;
-    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
-  };
+  // Provide unwrapping proxies for some methods used in engine operations
+  // such as arithmetic and JSON stringification.
+  _$1.prototype.valueOf = _$1.prototype.toJSON = _$1.prototype.value;
 
-  // Invokes interceptor with the obj, and then returns obj.
-  // The primary purpose of this method is to "tap into" a method chain, in
-  // order to perform operations on intermediate results within the chain.
-  _.tap = function(obj, interceptor) {
-    interceptor(obj);
-    return obj;
+  _$1.prototype.toString = function() {
+    return String(this._wrapped);
   };
 
-  // Returns whether an object has a given set of `key:value` pairs.
-  _.isMatch = function(object, attrs) {
-    var keys = _.keys(attrs), length = keys.length;
-    if (object == null) return !length;
-    var obj = Object(object);
-    for (var i = 0; i < length; i++) {
-      var key = keys[i];
-      if (attrs[key] !== obj[key] || !(key in obj)) return false;
-    }
-    return true;
-  };
+  // Internal function to wrap or shallow-copy an ArrayBuffer,
+  // typed array or DataView to a new view, reusing the buffer.
+  function toBufferView(bufferSource) {
+    return new Uint8Array(
+      bufferSource.buffer || bufferSource,
+      bufferSource.byteOffset || 0,
+      getByteLength(bufferSource)
+    );
+  }
 
+  // We use this string twice, so give it a name for minification.
+  var tagDataView = '[object DataView]';
 
-  // Internal recursive comparison function for `isEqual`.
-  var eq, deepEq;
-  eq = function(a, b, aStack, bStack) {
+  // Internal recursive comparison function for `_.isEqual`.
+  function eq(a, b, aStack, bStack) {
     // Identical objects are equal. `0 === -0`, but they aren't identical.
-    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
+    // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
     if (a === b) return a !== 0 || 1 / a === 1 / b;
     // `null` or `undefined` only equal to itself (strict comparison).
     if (a == null || b == null) return false;
@@ -1200,20 +365,25 @@
     var type = typeof a;
     if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
     return deepEq(a, b, aStack, bStack);
-  };
+  }
 
-  // Internal recursive comparison function for `isEqual`.
-  deepEq = function(a, b, aStack, bStack) {
+  // Internal recursive comparison function for `_.isEqual`.
+  function deepEq(a, b, aStack, bStack) {
     // Unwrap any wrapped objects.
-    if (a instanceof _) a = a._wrapped;
-    if (b instanceof _) b = b._wrapped;
+    if (a instanceof _$1) a = a._wrapped;
+    if (b instanceof _$1) b = b._wrapped;
     // Compare `[[Class]]` names.
     var className = toString.call(a);
     if (className !== toString.call(b)) return false;
+    // Work around a bug in IE 10 - Edge 13.
+    if (hasStringTagBug && className == '[object Object]' && isDataView$1(a)) {
+      if (!isDataView$1(b)) return false;
+      className = tagDataView;
+    }
     switch (className) {
-      // Strings, numbers, regular expressions, dates, and booleans are compared by value.
+      // These types are compared by value.
       case '[object RegExp]':
-      // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
+        // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
       case '[object String]':
         // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
         // equivalent to `new String("5")`.
@@ -1232,17 +402,27 @@
         return +a === +b;
       case '[object Symbol]':
         return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
+      case '[object ArrayBuffer]':
+      case tagDataView:
+        // Coerce to typed array so we can fall through.
+        return deepEq(toBufferView(a), toBufferView(b), aStack, bStack);
     }
 
     var areArrays = className === '[object Array]';
+    if (!areArrays && isTypedArray$1(a)) {
+        var byteLength = getByteLength(a);
+        if (byteLength !== getByteLength(b)) return false;
+        if (a.buffer === b.buffer && a.byteOffset === b.byteOffset) return true;
+        areArrays = true;
+    }
     if (!areArrays) {
       if (typeof a != 'object' || typeof b != 'object') return false;
 
       // Objects with different constructors are not equivalent, but `Object`s or `Array`s
       // from different frames are.
       var aCtor = a.constructor, bCtor = b.constructor;
-      if (aCtor !== bCtor && !(_.isFunction(aCtor) && aCtor instanceof aCtor &&
-                               _.isFunction(bCtor) && bCtor instanceof bCtor)
+      if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor &&
+                               isFunction$1(bCtor) && bCtor instanceof bCtor)
                           && ('constructor' in a && 'constructor' in b)) {
         return false;
       }
@@ -1276,259 +456,397 @@
       }
     } else {
       // Deep compare objects.
-      var keys = _.keys(a), key;
-      length = keys.length;
+      var _keys = keys(a), key;
+      length = _keys.length;
       // Ensure that both objects contain the same number of properties before comparing deep equality.
-      if (_.keys(b).length !== length) return false;
+      if (keys(b).length !== length) return false;
       while (length--) {
         // Deep compare each member
-        key = keys[length];
-        if (!(has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
+        key = _keys[length];
+        if (!(has$1(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
       }
     }
     // Remove the first object from the stack of traversed objects.
     aStack.pop();
     bStack.pop();
     return true;
-  };
+  }
 
   // Perform a deep comparison to check if two objects are equal.
-  _.isEqual = function(a, b) {
+  function isEqual(a, b) {
     return eq(a, b);
-  };
+  }
 
-  // Is a given array, string, or object empty?
-  // An "empty" object has no enumerable own-properties.
-  _.isEmpty = function(obj) {
-    if (obj == null) return true;
-    if (isArrayLike(obj) && (_.isArray(obj) || _.isString(obj) || _.isArguments(obj))) return obj.length === 0;
-    return _.keys(obj).length === 0;
-  };
+  // Retrieve all the enumerable property names of an object.
+  function allKeys(obj) {
+    if (!isObject(obj)) return [];
+    var keys = [];
+    for (var key in obj) keys.push(key);
+    // Ahem, IE < 9.
+    if (hasEnumBug) collectNonEnumProps(obj, keys);
+    return keys;
+  }
 
-  // Is a given value a DOM element?
-  _.isElement = function(obj) {
-    return !!(obj && obj.nodeType === 1);
-  };
+  // Since the regular `Object.prototype.toString` type tests don't work for
+  // some types in IE 11, we use a fingerprinting heuristic instead, based
+  // on the methods. It's not great, but it's the best we got.
+  // The fingerprint method lists are defined below.
+  function ie11fingerprint(methods) {
+    var length = getLength(methods);
+    return function(obj) {
+      if (obj == null) return false;
+      // `Map`, `WeakMap` and `Set` have no enumerable keys.
+      var keys = allKeys(obj);
+      if (getLength(keys)) return false;
+      for (var i = 0; i < length; i++) {
+        if (!isFunction$1(obj[methods[i]])) return false;
+      }
+      // If we are testing against `WeakMap`, we need to ensure that
+      // `obj` doesn't have a `forEach` method in order to distinguish
+      // it from a regular `Map`.
+      return methods !== weakMapMethods || !isFunction$1(obj[forEachName]);
+    };
+  }
 
-  // Is a given value an array?
-  // Delegates to ECMA5's native Array.isArray
-  _.isArray = nativeIsArray || function(obj) {
-    return toString.call(obj) === '[object Array]';
-  };
+  // In the interest of compact minification, we write
+  // each string in the fingerprints only once.
+  var forEachName = 'forEach',
+      hasName = 'has',
+      commonInit = ['clear', 'delete'],
+      mapTail = ['get', hasName, 'set'];
 
-  // Is a given variable an object?
-  _.isObject = function(obj) {
-    var type = typeof obj;
-    return type === 'function' || type === 'object' && !!obj;
-  };
+  // `Map`, `WeakMap` and `Set` each have slightly different
+  // combinations of the above sublists.
+  var mapMethods = commonInit.concat(forEachName, mapTail),
+      weakMapMethods = commonInit.concat(mapTail),
+      setMethods = ['add'].concat(commonInit, forEachName, hasName);
 
-  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp, isError, isMap, isWeakMap, isSet, isWeakSet.
-  _.each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp', 'Error', 'Symbol', 'Map', 'WeakMap', 'Set', 'WeakSet'], function(name) {
-    _['is' + name] = function(obj) {
-      return toString.call(obj) === '[object ' + name + ']';
-    };
-  });
+  var isMap = isIE11 ? ie11fingerprint(mapMethods) : tagTester('Map');
 
-  // Define a fallback version of the method in browsers (ahem, IE < 9), where
-  // there isn't any inspectable "Arguments" type.
-  if (!_.isArguments(arguments)) {
-    _.isArguments = function(obj) {
-      return has(obj, 'callee');
-    };
+  var isWeakMap = isIE11 ? ie11fingerprint(weakMapMethods) : tagTester('WeakMap');
+
+  var isSet = isIE11 ? ie11fingerprint(setMethods) : tagTester('Set');
+
+  var isWeakSet = tagTester('WeakSet');
+
+  // Retrieve the values of an object's properties.
+  function values(obj) {
+    var _keys = keys(obj);
+    var length = _keys.length;
+    var values = Array(length);
+    for (var i = 0; i < length; i++) {
+      values[i] = obj[_keys[i]];
+    }
+    return values;
   }
 
-  // Optimize `isFunction` if appropriate. Work around some typeof bugs in old v8,
-  // IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
-  var nodelist = root.document && root.document.childNodes;
-  if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
-    _.isFunction = function(obj) {
-      return typeof obj == 'function' || false;
+  // Convert an object into a list of `[key, value]` pairs.
+  // The opposite of `_.object` with one argument.
+  function pairs(obj) {
+    var _keys = keys(obj);
+    var length = _keys.length;
+    var pairs = Array(length);
+    for (var i = 0; i < length; i++) {
+      pairs[i] = [_keys[i], obj[_keys[i]]];
+    }
+    return pairs;
+  }
+
+  // Invert the keys and values of an object. The values must be serializable.
+  function invert(obj) {
+    var result = {};
+    var _keys = keys(obj);
+    for (var i = 0, length = _keys.length; i < length; i++) {
+      result[obj[_keys[i]]] = _keys[i];
+    }
+    return result;
+  }
+
+  // Return a sorted list of the function names available on the object.
+  function functions(obj) {
+    var names = [];
+    for (var key in obj) {
+      if (isFunction$1(obj[key])) names.push(key);
+    }
+    return names.sort();
+  }
+
+  // An internal function for creating assigner functions.
+  function createAssigner(keysFunc, defaults) {
+    return function(obj) {
+      var length = arguments.length;
+      if (defaults) obj = Object(obj);
+      if (length < 2 || obj == null) return obj;
+      for (var index = 1; index < length; index++) {
+        var source = arguments[index],
+            keys = keysFunc(source),
+            l = keys.length;
+        for (var i = 0; i < l; i++) {
+          var key = keys[i];
+          if (!defaults || obj[key] === void 0) obj[key] = source[key];
+        }
+      }
+      return obj;
     };
   }
 
-  // Is a given object a finite number?
-  _.isFinite = function(obj) {
-    return !_.isSymbol(obj) && isFinite(obj) && !isNaN(parseFloat(obj));
-  };
+  // Extend a given object with all the properties in passed-in object(s).
+  var extend = createAssigner(allKeys);
 
-  // Is the given value `NaN`?
-  _.isNaN = function(obj) {
-    return _.isNumber(obj) && isNaN(obj);
-  };
+  // Assigns a given object with all the own properties in the passed-in
+  // object(s).
+  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
+  var extendOwn = createAssigner(keys);
 
-  // Is a given value a boolean?
-  _.isBoolean = function(obj) {
-    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
-  };
+  // Fill in a given object with default properties.
+  var defaults = createAssigner(allKeys, true);
 
-  // Is a given value equal to null?
-  _.isNull = function(obj) {
-    return obj === null;
-  };
+  // Create a naked function reference for surrogate-prototype-swapping.
+  function ctor() {
+    return function(){};
+  }
 
-  // Is a given variable undefined?
-  _.isUndefined = function(obj) {
-    return obj === void 0;
-  };
+  // An internal function for creating a new object that inherits from another.
+  function baseCreate(prototype) {
+    if (!isObject(prototype)) return {};
+    if (nativeCreate) return nativeCreate(prototype);
+    var Ctor = ctor();
+    Ctor.prototype = prototype;
+    var result = new Ctor;
+    Ctor.prototype = null;
+    return result;
+  }
+
+  // Creates an object that inherits from the given prototype object.
+  // If additional properties are provided then they will be added to the
+  // created object.
+  function create(prototype, props) {
+    var result = baseCreate(prototype);
+    if (props) extendOwn(result, props);
+    return result;
+  }
 
-  // Shortcut function for checking if an object has a given property directly
-  // on itself (in other words, not on a prototype).
-  _.has = function(obj, path) {
-    if (!_.isArray(path)) {
-      return has(obj, path);
+  // Create a (shallow-cloned) duplicate of an object.
+  function clone(obj) {
+    if (!isObject(obj)) return obj;
+    return isArray(obj) ? obj.slice() : extend({}, obj);
+  }
+
+  // Invokes `interceptor` with the `obj` and then returns `obj`.
+  // The primary purpose of this method is to "tap into" a method chain, in
+  // order to perform operations on intermediate results within the chain.
+  function tap(obj, interceptor) {
+    interceptor(obj);
+    return obj;
+  }
+
+  // Normalize a (deep) property `path` to array.
+  // Like `_.iteratee`, this function can be customized.
+  function toPath$1(path) {
+    return isArray(path) ? path : [path];
+  }
+  _$1.toPath = toPath$1;
+
+  // Internal wrapper for `_.toPath` to enable minification.
+  // Similar to `cb` for `_.iteratee`.
+  function toPath(path) {
+    return _$1.toPath(path);
+  }
+
+  // Internal function to obtain a nested property in `obj` along `path`.
+  function deepGet(obj, path) {
+    var length = path.length;
+    for (var i = 0; i < length; i++) {
+      if (obj == null) return void 0;
+      obj = obj[path[i]];
     }
+    return length ? obj : void 0;
+  }
+
+  // Get the value of the (deep) property on `path` from `object`.
+  // If any property in `path` does not exist or if the value is
+  // `undefined`, return `defaultValue` instead.
+  // The `path` is normalized through `_.toPath`.
+  function get(object, path, defaultValue) {
+    var value = deepGet(object, toPath(path));
+    return isUndefined(value) ? defaultValue : value;
+  }
+
+  // Shortcut function for checking if an object has a given property directly on
+  // itself (in other words, not on a prototype). Unlike the internal `has`
+  // function, this public version can also traverse nested properties.
+  function has(obj, path) {
+    path = toPath(path);
     var length = path.length;
     for (var i = 0; i < length; i++) {
       var key = path[i];
-      if (obj == null || !hasOwnProperty.call(obj, key)) {
-        return false;
-      }
+      if (!has$1(obj, key)) return false;
       obj = obj[key];
     }
     return !!length;
-  };
-
-  // Utility Functions
-  // -----------------
-
-  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
-  // previous owner. Returns a reference to the Underscore object.
-  _.noConflict = function() {
-    root._ = previousUnderscore;
-    return this;
-  };
+  }
 
   // Keep the identity function around for default iteratees.
-  _.identity = function(value) {
+  function identity(value) {
     return value;
-  };
+  }
 
-  // Predicate-generating functions. Often useful outside of Underscore.
-  _.constant = function(value) {
-    return function() {
-      return value;
+  // Returns a predicate for checking whether an object has a given set of
+  // `key:value` pairs.
+  function matcher(attrs) {
+    attrs = extendOwn({}, attrs);
+    return function(obj) {
+      return isMatch(obj, attrs);
     };
-  };
-
-  _.noop = function(){};
+  }
 
   // Creates a function that, when passed an object, will traverse that object’s
-  // properties down the given `path`, specified as an array of keys or indexes.
-  _.property = function(path) {
-    if (!_.isArray(path)) {
-      return shallowProperty(path);
-    }
+  // properties down the given `path`, specified as an array of keys or indices.
+  function property(path) {
+    path = toPath(path);
     return function(obj) {
       return deepGet(obj, path);
     };
-  };
+  }
 
-  // Generates a function for a given object that returns a given property.
-  _.propertyOf = function(obj) {
-    if (obj == null) {
-      return function(){};
+  // Internal function that returns an efficient (for current engines) version
+  // of the passed-in callback, to be repeatedly applied in other Underscore
+  // functions.
+  function optimizeCb(func, context, argCount) {
+    if (context === void 0) return func;
+    switch (argCount == null ? 3 : argCount) {
+      case 1: return function(value) {
+        return func.call(context, value);
+      };
+      // The 2-argument case is omitted because we’re not using it.
+      case 3: return function(value, index, collection) {
+        return func.call(context, value, index, collection);
+      };
+      case 4: return function(accumulator, value, index, collection) {
+        return func.call(context, accumulator, value, index, collection);
+      };
     }
-    return function(path) {
-      return !_.isArray(path) ? obj[path] : deepGet(obj, path);
+    return function() {
+      return func.apply(context, arguments);
     };
-  };
+  }
 
-  // Returns a predicate for checking whether an object has a given set of
-  // `key:value` pairs.
-  _.matcher = _.matches = function(attrs) {
-    attrs = _.extendOwn({}, attrs);
-    return function(obj) {
-      return _.isMatch(obj, attrs);
+  // An internal function to generate callbacks that can be applied to each
+  // element in a collection, returning the desired result — either `_.identity`,
+  // an arbitrary callback, a property matcher, or a property accessor.
+  function baseIteratee(value, context, argCount) {
+    if (value == null) return identity;
+    if (isFunction$1(value)) return optimizeCb(value, context, argCount);
+    if (isObject(value) && !isArray(value)) return matcher(value);
+    return property(value);
+  }
+
+  // External wrapper for our callback generator. Users may customize
+  // `_.iteratee` if they want additional predicate/iteratee shorthand styles.
+  // This abstraction hides the internal-only `argCount` argument.
+  function iteratee(value, context) {
+    return baseIteratee(value, context, Infinity);
+  }
+  _$1.iteratee = iteratee;
+
+  // The function we call internally to generate a callback. It invokes
+  // `_.iteratee` if overridden, otherwise `baseIteratee`.
+  function cb(value, context, argCount) {
+    if (_$1.iteratee !== iteratee) return _$1.iteratee(value, context);
+    return baseIteratee(value, context, argCount);
+  }
+
+  // Returns the results of applying the `iteratee` to each element of `obj`.
+  // In contrast to `_.map` it returns an object.
+  function mapObject(obj, iteratee, context) {
+    iteratee = cb(iteratee, context);
+    var _keys = keys(obj),
+        length = _keys.length,
+        results = {};
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys[index];
+      results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
+    }
+    return results;
+  }
+
+  // Predicate-generating function. Often useful outside of Underscore.
+  function noop(){}
+
+  // Generates a function for a given object that returns a given property.
+  function propertyOf(obj) {
+    if (obj == null) return noop;
+    return function(path) {
+      return get(obj, path);
     };
-  };
+  }
 
   // Run a function **n** times.
-  _.times = function(n, iteratee, context) {
+  function times(n, iteratee, context) {
     var accum = Array(Math.max(0, n));
     iteratee = optimizeCb(iteratee, context, 1);
     for (var i = 0; i < n; i++) accum[i] = iteratee(i);
     return accum;
-  };
+  }
 
-  // Return a random integer between min and max (inclusive).
-  _.random = function(min, max) {
+  // Return a random integer between `min` and `max` (inclusive).
+  function random(min, max) {
     if (max == null) {
       max = min;
       min = 0;
     }
     return min + Math.floor(Math.random() * (max - min + 1));
-  };
+  }
 
   // A (possibly faster) way to get the current timestamp as an integer.
-  _.now = Date.now || function() {
+  var now = Date.now || function() {
     return new Date().getTime();
   };
 
-  // List of HTML entities for escaping.
-  var escapeMap = {
-    '&': '&amp;',
-    '<': '&lt;',
-    '>': '&gt;',
-    '"': '&quot;',
-    "'": '&#x27;',
-    '`': '&#x60;'
-  };
-  var unescapeMap = _.invert(escapeMap);
-
-  // Functions for escaping and unescaping strings to/from HTML interpolation.
-  var createEscaper = function(map) {
+  // Internal helper to generate functions for escaping and unescaping strings
+  // to/from HTML interpolation.
+  function createEscaper(map) {
     var escaper = function(match) {
       return map[match];
     };
     // Regexes for identifying a key that needs to be escaped.
-    var source = '(?:' + _.keys(map).join('|') + ')';
+    var source = '(?:' + keys(map).join('|') + ')';
     var testRegexp = RegExp(source);
     var replaceRegexp = RegExp(source, 'g');
     return function(string) {
       string = string == null ? '' : '' + string;
       return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
     };
-  };
-  _.escape = createEscaper(escapeMap);
-  _.unescape = createEscaper(unescapeMap);
+  }
 
-  // Traverses the children of `obj` along `path`. If a child is a function, it
-  // is invoked with its parent as context. Returns the value of the final
-  // child, or `fallback` if any child is undefined.
-  _.result = function(obj, path, fallback) {
-    if (!_.isArray(path)) path = [path];
-    var length = path.length;
-    if (!length) {
-      return _.isFunction(fallback) ? fallback.call(obj) : fallback;
-    }
-    for (var i = 0; i < length; i++) {
-      var prop = obj == null ? void 0 : obj[path[i]];
-      if (prop === void 0) {
-        prop = fallback;
-        i = length; // Ensure we don't continue iterating.
-      }
-      obj = _.isFunction(prop) ? prop.call(obj) : prop;
-    }
-    return obj;
+  // Internal list of HTML entities for escaping.
+  var escapeMap = {
+    '&': '&amp;',
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    "'": '&#x27;',
+    '`': '&#x60;'
   };
 
-  // Generate a unique integer id (unique within the entire client session).
-  // Useful for temporary DOM ids.
-  var idCounter = 0;
-  _.uniqueId = function(prefix) {
-    var id = ++idCounter + '';
-    return prefix ? prefix + id : id;
-  };
+  // Function for escaping strings to HTML interpolation.
+  var _escape = createEscaper(escapeMap);
+
+  // Internal list of HTML entities for unescaping.
+  var unescapeMap = invert(escapeMap);
 
-  // By default, Underscore uses ERB-style template delimiters, change the
+  // Function for unescaping strings from HTML interpolation.
+  var _unescape = createEscaper(unescapeMap);
+
+  // By default, Underscore uses ERB-style template delimiters. Change the
   // following template settings to use alternative delimiters.
-  _.templateSettings = {
+  var templateSettings = _$1.templateSettings = {
     evaluate: /<%([\s\S]+?)%>/g,
     interpolate: /<%=([\s\S]+?)%>/g,
     escape: /<%-([\s\S]+?)%>/g
   };
 
-  // When customizing `templateSettings`, if you don't want to define an
+  // When customizing `_.templateSettings`, if you don't want to define an
   // interpolation, evaluation or escaping regex, we need one that is
   // guaranteed not to match.
   var noMatch = /(.)^/;
@@ -1546,9 +864,9 @@
 
   var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;
 
-  var escapeChar = function(match) {
+  function escapeChar(match) {
     return '\\' + escapes[match];
-  };
+  }
 
   // In order to prevent third-party code injection through
   // `_.templateSettings.variable`, we test it against the following regular
@@ -1561,9 +879,9 @@
   // Underscore templating handles arbitrary delimiters, preserves whitespace,
   // and correctly escapes quotes within interpolated code.
   // NB: `oldSettings` only exists for backwards compatibility.
-  _.template = function(text, settings, oldSettings) {
+  function template(text, settings, oldSettings) {
     if (!settings && oldSettings) settings = oldSettings;
-    settings = _.defaults({}, settings, _.templateSettings);
+    settings = defaults({}, settings, _$1.templateSettings);
 
     // Combine delimiters into one regular expression via alternation.
     var matcher = RegExp([
@@ -1594,7 +912,7 @@
 
     var argument = settings.variable;
     if (argument) {
-      // Insure against third-party code injection.
+      // Insure against third-party code injection. (CVE-2021-23358)
       if (!bareIdentifier.test(argument)) throw new Error(
         'variable is not a bare identifier: ' + argument
       );
@@ -1617,91 +935,1108 @@
     }
 
     var template = function(data) {
-      return render.call(this, data, _);
+      return render.call(this, data, _$1);
     };
 
     // Provide the compiled source as a convenience for precompilation.
     template.source = 'function(' + argument + '){\n' + source + '}';
 
     return template;
-  };
+  }
+
+  // Traverses the children of `obj` along `path`. If a child is a function, it
+  // is invoked with its parent as context. Returns the value of the final
+  // child, or `fallback` if any child is undefined.
+  function result(obj, path, fallback) {
+    path = toPath(path);
+    var length = path.length;
+    if (!length) {
+      return isFunction$1(fallback) ? fallback.call(obj) : fallback;
+    }
+    for (var i = 0; i < length; i++) {
+      var prop = obj == null ? void 0 : obj[path[i]];
+      if (prop === void 0) {
+        prop = fallback;
+        i = length; // Ensure we don't continue iterating.
+      }
+      obj = isFunction$1(prop) ? prop.call(obj) : prop;
+    }
+    return obj;
+  }
 
-  // Add a "chain" function. Start chaining a wrapped Underscore object.
-  _.chain = function(obj) {
-    var instance = _(obj);
+  // Generate a unique integer id (unique within the entire client session).
+  // Useful for temporary DOM ids.
+  var idCounter = 0;
+  function uniqueId(prefix) {
+    var id = ++idCounter + '';
+    return prefix ? prefix + id : id;
+  }
+
+  // Start chaining a wrapped Underscore object.
+  function chain(obj) {
+    var instance = _$1(obj);
     instance._chain = true;
     return instance;
-  };
+  }
+
+  // Internal function to execute `sourceFunc` bound to `context` with optional
+  // `args`. Determines whether to execute a function as a constructor or as a
+  // normal function.
+  function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
+    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
+    var self = baseCreate(sourceFunc.prototype);
+    var result = sourceFunc.apply(self, args);
+    if (isObject(result)) return result;
+    return self;
+  }
+
+  // Partially apply a function by creating a version that has had some of its
+  // arguments pre-filled, without changing its dynamic `this` context. `_` acts
+  // as a placeholder by default, allowing any combination of arguments to be
+  // pre-filled. Set `_.partial.placeholder` for a custom placeholder argument.
+  var partial = restArguments(function(func, boundArgs) {
+    var placeholder = partial.placeholder;
+    var bound = function() {
+      var position = 0, length = boundArgs.length;
+      var args = Array(length);
+      for (var i = 0; i < length; i++) {
+        args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
+      }
+      while (position < arguments.length) args.push(arguments[position++]);
+      return executeBound(func, bound, this, this, args);
+    };
+    return bound;
+  });
+
+  partial.placeholder = _$1;
+
+  // Create a function bound to a given object (assigning `this`, and arguments,
+  // optionally).
+  var bind = restArguments(function(func, context, args) {
+    if (!isFunction$1(func)) throw new TypeError('Bind must be called on a function');
+    var bound = restArguments(function(callArgs) {
+      return executeBound(func, bound, context, this, args.concat(callArgs));
+    });
+    return bound;
+  });
+
+  // Internal helper for collection methods to determine whether a collection
+  // should be iterated as an array or as an object.
+  // Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
+  // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
+  var isArrayLike = createSizePropertyCheck(getLength);
+
+  // Internal implementation of a recursive `flatten` function.
+  function flatten$1(input, depth, strict, output) {
+    output = output || [];
+    if (!depth && depth !== 0) {
+      depth = Infinity;
+    } else if (depth <= 0) {
+      return output.concat(input);
+    }
+    var idx = output.length;
+    for (var i = 0, length = getLength(input); i < length; i++) {
+      var value = input[i];
+      if (isArrayLike(value) && (isArray(value) || isArguments$1(value))) {
+        // Flatten current level of array or arguments object.
+        if (depth > 1) {
+          flatten$1(value, depth - 1, strict, output);
+          idx = output.length;
+        } else {
+          var j = 0, len = value.length;
+          while (j < len) output[idx++] = value[j++];
+        }
+      } else if (!strict) {
+        output[idx++] = value;
+      }
+    }
+    return output;
+  }
+
+  // Bind a number of an object's methods to that object. Remaining arguments
+  // are the method names to be bound. Useful for ensuring that all callbacks
+  // defined on an object belong to it.
+  var bindAll = restArguments(function(obj, keys) {
+    keys = flatten$1(keys, false, false);
+    var index = keys.length;
+    if (index < 1) throw new Error('bindAll must be passed function names');
+    while (index--) {
+      var key = keys[index];
+      obj[key] = bind(obj[key], obj);
+    }
+    return obj;
+  });
+
+  // Memoize an expensive function by storing its results.
+  function memoize(func, hasher) {
+    var memoize = function(key) {
+      var cache = memoize.cache;
+      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
+      if (!has$1(cache, address)) cache[address] = func.apply(this, arguments);
+      return cache[address];
+    };
+    memoize.cache = {};
+    return memoize;
+  }
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  var delay = restArguments(function(func, wait, args) {
+    return setTimeout(function() {
+      return func.apply(null, args);
+    }, wait);
+  });
+
+  // Defers a function, scheduling it to run after the current call stack has
+  // cleared.
+  var defer = partial(delay, _$1, 1);
+
+  // Returns a function, that, when invoked, will only be triggered at most once
+  // during a given window of time. Normally, the throttled function will run
+  // as much as it can, without ever going more than once per `wait` duration;
+  // but if you'd like to disable the execution on the leading edge, pass
+  // `{leading: false}`. To disable execution on the trailing edge, ditto.
+  function throttle(func, wait, options) {
+    var timeout, context, args, result;
+    var previous = 0;
+    if (!options) options = {};
 
-  // OOP
-  // ---------------
-  // If Underscore is called as a function, it returns a wrapped object that
-  // can be used OO-style. This wrapper holds altered versions of all the
-  // underscore functions. Wrapped objects may be chained.
+    var later = function() {
+      previous = options.leading === false ? 0 : now();
+      timeout = null;
+      result = func.apply(context, args);
+      if (!timeout) context = args = null;
+    };
+
+    var throttled = function() {
+      var _now = now();
+      if (!previous && options.leading === false) previous = _now;
+      var remaining = wait - (_now - previous);
+      context = this;
+      args = arguments;
+      if (remaining <= 0 || remaining > wait) {
+        if (timeout) {
+          clearTimeout(timeout);
+          timeout = null;
+        }
+        previous = _now;
+        result = func.apply(context, args);
+        if (!timeout) context = args = null;
+      } else if (!timeout && options.trailing !== false) {
+        timeout = setTimeout(later, remaining);
+      }
+      return result;
+    };
+
+    throttled.cancel = function() {
+      clearTimeout(timeout);
+      previous = 0;
+      timeout = context = args = null;
+    };
+
+    return throttled;
+  }
+
+  // When a sequence of calls of the returned function ends, the argument
+  // function is triggered. The end of a sequence is defined by the `wait`
+  // parameter. If `immediate` is passed, the argument function will be
+  // triggered at the beginning of the sequence instead of at the end.
+  function debounce(func, wait, immediate) {
+    var timeout, previous, args, result, context;
+
+    var later = function() {
+      var passed = now() - previous;
+      if (wait > passed) {
+        timeout = setTimeout(later, wait - passed);
+      } else {
+        timeout = null;
+        if (!immediate) result = func.apply(context, args);
+        // This check is needed because `func` can recursively invoke `debounced`.
+        if (!timeout) args = context = null;
+      }
+    };
+
+    var debounced = restArguments(function(_args) {
+      context = this;
+      args = _args;
+      previous = now();
+      if (!timeout) {
+        timeout = setTimeout(later, wait);
+        if (immediate) result = func.apply(context, args);
+      }
+      return result;
+    });
+
+    debounced.cancel = function() {
+      clearTimeout(timeout);
+      timeout = args = context = null;
+    };
+
+    return debounced;
+  }
+
+  // Returns the first function passed as an argument to the second,
+  // allowing you to adjust arguments, run code before and after, and
+  // conditionally execute the original function.
+  function wrap(func, wrapper) {
+    return partial(wrapper, func);
+  }
+
+  // Returns a negated version of the passed-in predicate.
+  function negate(predicate) {
+    return function() {
+      return !predicate.apply(this, arguments);
+    };
+  }
+
+  // Returns a function that is the composition of a list of functions, each
+  // consuming the return value of the function that follows.
+  function compose() {
+    var args = arguments;
+    var start = args.length - 1;
+    return function() {
+      var i = start;
+      var result = args[start].apply(this, arguments);
+      while (i--) result = args[i].call(this, result);
+      return result;
+    };
+  }
+
+  // Returns a function that will only be executed on and after the Nth call.
+  function after(times, func) {
+    return function() {
+      if (--times < 1) {
+        return func.apply(this, arguments);
+      }
+    };
+  }
+
+  // Returns a function that will only be executed up to (but not including) the
+  // Nth call.
+  function before(times, func) {
+    var memo;
+    return function() {
+      if (--times > 0) {
+        memo = func.apply(this, arguments);
+      }
+      if (times <= 1) func = null;
+      return memo;
+    };
+  }
+
+  // Returns a function that will be executed at most one time, no matter how
+  // often you call it. Useful for lazy initialization.
+  var once = partial(before, 2);
+
+  // Returns the first key on an object that passes a truth test.
+  function findKey(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = keys(obj), key;
+    for (var i = 0, length = _keys.length; i < length; i++) {
+      key = _keys[i];
+      if (predicate(obj[key], key, obj)) return key;
+    }
+  }
+
+  // Internal function to generate `_.findIndex` and `_.findLastIndex`.
+  function createPredicateIndexFinder(dir) {
+    return function(array, predicate, context) {
+      predicate = cb(predicate, context);
+      var length = getLength(array);
+      var index = dir > 0 ? 0 : length - 1;
+      for (; index >= 0 && index < length; index += dir) {
+        if (predicate(array[index], index, array)) return index;
+      }
+      return -1;
+    };
+  }
+
+  // Returns the first index on an array-like that passes a truth test.
+  var findIndex = createPredicateIndexFinder(1);
+
+  // Returns the last index on an array-like that passes a truth test.
+  var findLastIndex = createPredicateIndexFinder(-1);
+
+  // Use a comparator function to figure out the smallest index at which
+  // an object should be inserted so as to maintain order. Uses binary search.
+  function sortedIndex(array, obj, iteratee, context) {
+    iteratee = cb(iteratee, context, 1);
+    var value = iteratee(obj);
+    var low = 0, high = getLength(array);
+    while (low < high) {
+      var mid = Math.floor((low + high) / 2);
+      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
+    }
+    return low;
+  }
+
+  // Internal function to generate the `_.indexOf` and `_.lastIndexOf` functions.
+  function createIndexFinder(dir, predicateFind, sortedIndex) {
+    return function(array, item, idx) {
+      var i = 0, length = getLength(array);
+      if (typeof idx == 'number') {
+        if (dir > 0) {
+          i = idx >= 0 ? idx : Math.max(idx + length, i);
+        } else {
+          length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
+        }
+      } else if (sortedIndex && idx && length) {
+        idx = sortedIndex(array, item);
+        return array[idx] === item ? idx : -1;
+      }
+      if (item !== item) {
+        idx = predicateFind(slice.call(array, i, length), isNaN$1);
+        return idx >= 0 ? idx + i : -1;
+      }
+      for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
+        if (array[idx] === item) return idx;
+      }
+      return -1;
+    };
+  }
+
+  // Return the position of the first occurrence of an item in an array,
+  // or -1 if the item is not included in the array.
+  // If the array is large and already in sort order, pass `true`
+  // for **isSorted** to use binary search.
+  var indexOf = createIndexFinder(1, findIndex, sortedIndex);
+
+  // Return the position of the last occurrence of an item in an array,
+  // or -1 if the item is not included in the array.
+  var lastIndexOf = createIndexFinder(-1, findLastIndex);
+
+  // Return the first value which passes a truth test.
+  function find(obj, predicate, context) {
+    var keyFinder = isArrayLike(obj) ? findIndex : findKey;
+    var key = keyFinder(obj, predicate, context);
+    if (key !== void 0 && key !== -1) return obj[key];
+  }
+
+  // Convenience version of a common use case of `_.find`: getting the first
+  // object containing specific `key:value` pairs.
+  function findWhere(obj, attrs) {
+    return find(obj, matcher(attrs));
+  }
+
+  // The cornerstone for collection functions, an `each`
+  // implementation, aka `forEach`.
+  // Handles raw objects in addition to array-likes. Treats all
+  // sparse array-likes as if they were dense.
+  function each(obj, iteratee, context) {
+    iteratee = optimizeCb(iteratee, context);
+    var i, length;
+    if (isArrayLike(obj)) {
+      for (i = 0, length = obj.length; i < length; i++) {
+        iteratee(obj[i], i, obj);
+      }
+    } else {
+      var _keys = keys(obj);
+      for (i = 0, length = _keys.length; i < length; i++) {
+        iteratee(obj[_keys[i]], _keys[i], obj);
+      }
+    }
+    return obj;
+  }
+
+  // Return the results of applying the iteratee to each element.
+  function map(obj, iteratee, context) {
+    iteratee = cb(iteratee, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length,
+        results = Array(length);
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      results[index] = iteratee(obj[currentKey], currentKey, obj);
+    }
+    return results;
+  }
+
+  // Internal helper to create a reducing function, iterating left or right.
+  function createReduce(dir) {
+    // Wrap code that reassigns argument variables in a separate function than
+    // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
+    var reducer = function(obj, iteratee, memo, initial) {
+      var _keys = !isArrayLike(obj) && keys(obj),
+          length = (_keys || obj).length,
+          index = dir > 0 ? 0 : length - 1;
+      if (!initial) {
+        memo = obj[_keys ? _keys[index] : index];
+        index += dir;
+      }
+      for (; index >= 0 && index < length; index += dir) {
+        var currentKey = _keys ? _keys[index] : index;
+        memo = iteratee(memo, obj[currentKey], currentKey, obj);
+      }
+      return memo;
+    };
+
+    return function(obj, iteratee, memo, context) {
+      var initial = arguments.length >= 3;
+      return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
+    };
+  }
+
+  // **Reduce** builds up a single result from a list of values, aka `inject`,
+  // or `foldl`.
+  var reduce = createReduce(1);
+
+  // The right-associative version of reduce, also known as `foldr`.
+  var reduceRight = createReduce(-1);
+
+  // Return all the elements that pass a truth test.
+  function filter(obj, predicate, context) {
+    var results = [];
+    predicate = cb(predicate, context);
+    each(obj, function(value, index, list) {
+      if (predicate(value, index, list)) results.push(value);
+    });
+    return results;
+  }
+
+  // Return all the elements for which a truth test fails.
+  function reject(obj, predicate, context) {
+    return filter(obj, negate(cb(predicate)), context);
+  }
+
+  // Determine whether all of the elements pass a truth test.
+  function every(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length;
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      if (!predicate(obj[currentKey], currentKey, obj)) return false;
+    }
+    return true;
+  }
+
+  // Determine if at least one element in the object passes a truth test.
+  function some(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length;
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      if (predicate(obj[currentKey], currentKey, obj)) return true;
+    }
+    return false;
+  }
+
+  // Determine if the array or object contains a given item (using `===`).
+  function contains(obj, item, fromIndex, guard) {
+    if (!isArrayLike(obj)) obj = values(obj);
+    if (typeof fromIndex != 'number' || guard) fromIndex = 0;
+    return indexOf(obj, item, fromIndex) >= 0;
+  }
+
+  // Invoke a method (with arguments) on every item in a collection.
+  var invoke = restArguments(function(obj, path, args) {
+    var contextPath, func;
+    if (isFunction$1(path)) {
+      func = path;
+    } else {
+      path = toPath(path);
+      contextPath = path.slice(0, -1);
+      path = path[path.length - 1];
+    }
+    return map(obj, function(context) {
+      var method = func;
+      if (!method) {
+        if (contextPath && contextPath.length) {
+          context = deepGet(context, contextPath);
+        }
+        if (context == null) return void 0;
+        method = context[path];
+      }
+      return method == null ? method : method.apply(context, args);
+    });
+  });
+
+  // Convenience version of a common use case of `_.map`: fetching a property.
+  function pluck(obj, key) {
+    return map(obj, property(key));
+  }
+
+  // Convenience version of a common use case of `_.filter`: selecting only
+  // objects containing specific `key:value` pairs.
+  function where(obj, attrs) {
+    return filter(obj, matcher(attrs));
+  }
+
+  // Return the maximum element (or element-based computation).
+  function max(obj, iteratee, context) {
+    var result = -Infinity, lastComputed = -Infinity,
+        value, computed;
+    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
+      obj = isArrayLike(obj) ? obj : values(obj);
+      for (var i = 0, length = obj.length; i < length; i++) {
+        value = obj[i];
+        if (value != null && value > result) {
+          result = value;
+        }
+      }
+    } else {
+      iteratee = cb(iteratee, context);
+      each(obj, function(v, index, list) {
+        computed = iteratee(v, index, list);
+        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
+          result = v;
+          lastComputed = computed;
+        }
+      });
+    }
+    return result;
+  }
+
+  // Return the minimum element (or element-based computation).
+  function min(obj, iteratee, context) {
+    var result = Infinity, lastComputed = Infinity,
+        value, computed;
+    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
+      obj = isArrayLike(obj) ? obj : values(obj);
+      for (var i = 0, length = obj.length; i < length; i++) {
+        value = obj[i];
+        if (value != null && value < result) {
+          result = value;
+        }
+      }
+    } else {
+      iteratee = cb(iteratee, context);
+      each(obj, function(v, index, list) {
+        computed = iteratee(v, index, list);
+        if (computed < lastComputed || computed === Infinity && result === Infinity) {
+          result = v;
+          lastComputed = computed;
+        }
+      });
+    }
+    return result;
+  }
+
+  // Safely create a real, live array from anything iterable.
+  var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
+  function toArray(obj) {
+    if (!obj) return [];
+    if (isArray(obj)) return slice.call(obj);
+    if (isString(obj)) {
+      // Keep surrogate pair characters together.
+      return obj.match(reStrSymbol);
+    }
+    if (isArrayLike(obj)) return map(obj, identity);
+    return values(obj);
+  }
+
+  // Sample **n** random values from a collection using the modern version of the
+  // [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
+  // If **n** is not specified, returns a single random element.
+  // The internal `guard` argument allows it to work with `_.map`.
+  function sample(obj, n, guard) {
+    if (n == null || guard) {
+      if (!isArrayLike(obj)) obj = values(obj);
+      return obj[random(obj.length - 1)];
+    }
+    var sample = toArray(obj);
+    var length = getLength(sample);
+    n = Math.max(Math.min(n, length), 0);
+    var last = length - 1;
+    for (var index = 0; index < n; index++) {
+      var rand = random(index, last);
+      var temp = sample[index];
+      sample[index] = sample[rand];
+      sample[rand] = temp;
+    }
+    return sample.slice(0, n);
+  }
+
+  // Shuffle a collection.
+  function shuffle(obj) {
+    return sample(obj, Infinity);
+  }
+
+  // Sort the object's values by a criterion produced by an iteratee.
+  function sortBy(obj, iteratee, context) {
+    var index = 0;
+    iteratee = cb(iteratee, context);
+    return pluck(map(obj, function(value, key, list) {
+      return {
+        value: value,
+        index: index++,
+        criteria: iteratee(value, key, list)
+      };
+    }).sort(function(left, right) {
+      var a = left.criteria;
+      var b = right.criteria;
+      if (a !== b) {
+        if (a > b || a === void 0) return 1;
+        if (a < b || b === void 0) return -1;
+      }
+      return left.index - right.index;
+    }), 'value');
+  }
+
+  // An internal function used for aggregate "group by" operations.
+  function group(behavior, partition) {
+    return function(obj, iteratee, context) {
+      var result = partition ? [[], []] : {};
+      iteratee = cb(iteratee, context);
+      each(obj, function(value, index) {
+        var key = iteratee(value, index, obj);
+        behavior(result, value, key);
+      });
+      return result;
+    };
+  }
+
+  // Groups the object's values by a criterion. Pass either a string attribute
+  // to group by, or a function that returns the criterion.
+  var groupBy = group(function(result, value, key) {
+    if (has$1(result, key)) result[key].push(value); else result[key] = [value];
+  });
+
+  // Indexes the object's values by a criterion, similar to `_.groupBy`, but for
+  // when you know that your index values will be unique.
+  var indexBy = group(function(result, value, key) {
+    result[key] = value;
+  });
+
+  // Counts instances of an object that group by a certain criterion. Pass
+  // either a string attribute to count by, or a function that returns the
+  // criterion.
+  var countBy = group(function(result, value, key) {
+    if (has$1(result, key)) result[key]++; else result[key] = 1;
+  });
+
+  // Split a collection into two arrays: one whose elements all pass the given
+  // truth test, and one whose elements all do not pass the truth test.
+  var partition = group(function(result, value, pass) {
+    result[pass ? 0 : 1].push(value);
+  }, true);
+
+  // Return the number of elements in a collection.
+  function size(obj) {
+    if (obj == null) return 0;
+    return isArrayLike(obj) ? obj.length : keys(obj).length;
+  }
+
+  // Internal `_.pick` helper function to determine whether `key` is an enumerable
+  // property name of `obj`.
+  function keyInObj(value, key, obj) {
+    return key in obj;
+  }
+
+  // Return a copy of the object only containing the allowed properties.
+  var pick = restArguments(function(obj, keys) {
+    var result = {}, iteratee = keys[0];
+    if (obj == null) return result;
+    if (isFunction$1(iteratee)) {
+      if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
+      keys = allKeys(obj);
+    } else {
+      iteratee = keyInObj;
+      keys = flatten$1(keys, false, false);
+      obj = Object(obj);
+    }
+    for (var i = 0, length = keys.length; i < length; i++) {
+      var key = keys[i];
+      var value = obj[key];
+      if (iteratee(value, key, obj)) result[key] = value;
+    }
+    return result;
+  });
+
+  // Return a copy of the object without the disallowed properties.
+  var omit = restArguments(function(obj, keys) {
+    var iteratee = keys[0], context;
+    if (isFunction$1(iteratee)) {
+      iteratee = negate(iteratee);
+      if (keys.length > 1) context = keys[1];
+    } else {
+      keys = map(flatten$1(keys, false, false), String);
+      iteratee = function(value, key) {
+        return !contains(keys, key);
+      };
+    }
+    return pick(obj, iteratee, context);
+  });
+
+  // Returns everything but the last entry of the array. Especially useful on
+  // the arguments object. Passing **n** will return all the values in
+  // the array, excluding the last N.
+  function initial(array, n, guard) {
+    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
+  }
+
+  // Get the first element of an array. Passing **n** will return the first N
+  // values in the array. The **guard** check allows it to work with `_.map`.
+  function first(array, n, guard) {
+    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+    if (n == null || guard) return array[0];
+    return initial(array, array.length - n);
+  }
+
+  // Returns everything but the first entry of the `array`. Especially useful on
+  // the `arguments` object. Passing an **n** will return the rest N values in the
+  // `array`.
+  function rest(array, n, guard) {
+    return slice.call(array, n == null || guard ? 1 : n);
+  }
+
+  // Get the last element of an array. Passing **n** will return the last N
+  // values in the array.
+  function last(array, n, guard) {
+    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+    if (n == null || guard) return array[array.length - 1];
+    return rest(array, Math.max(0, array.length - n));
+  }
+
+  // Trim out all falsy values from an array.
+  function compact(array) {
+    return filter(array, Boolean);
+  }
+
+  // Flatten out an array, either recursively (by default), or up to `depth`.
+  // Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively.
+  function flatten(array, depth) {
+    return flatten$1(array, depth, false);
+  }
+
+  // Take the difference between one array and a number of other arrays.
+  // Only the elements present in just the first array will remain.
+  var difference = restArguments(function(array, rest) {
+    rest = flatten$1(rest, true, true);
+    return filter(array, function(value){
+      return !contains(rest, value);
+    });
+  });
+
+  // Return a version of the array that does not contain the specified value(s).
+  var without = restArguments(function(array, otherArrays) {
+    return difference(array, otherArrays);
+  });
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  // The faster algorithm will not work with an iteratee if the iteratee
+  // is not a one-to-one function, so providing an iteratee will disable
+  // the faster algorithm.
+  function uniq(array, isSorted, iteratee, context) {
+    if (!isBoolean(isSorted)) {
+      context = iteratee;
+      iteratee = isSorted;
+      isSorted = false;
+    }
+    if (iteratee != null) iteratee = cb(iteratee, context);
+    var result = [];
+    var seen = [];
+    for (var i = 0, length = getLength(array); i < length; i++) {
+      var value = array[i],
+          computed = iteratee ? iteratee(value, i, array) : value;
+      if (isSorted && !iteratee) {
+        if (!i || seen !== computed) result.push(value);
+        seen = computed;
+      } else if (iteratee) {
+        if (!contains(seen, computed)) {
+          seen.push(computed);
+          result.push(value);
+        }
+      } else if (!contains(result, value)) {
+        result.push(value);
+      }
+    }
+    return result;
+  }
+
+  // Produce an array that contains the union: each distinct element from all of
+  // the passed-in arrays.
+  var union = restArguments(function(arrays) {
+    return uniq(flatten$1(arrays, true, true));
+  });
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays.
+  function intersection(array) {
+    var result = [];
+    var argsLength = arguments.length;
+    for (var i = 0, length = getLength(array); i < length; i++) {
+      var item = array[i];
+      if (contains(result, item)) continue;
+      var j;
+      for (j = 1; j < argsLength; j++) {
+        if (!contains(arguments[j], item)) break;
+      }
+      if (j === argsLength) result.push(item);
+    }
+    return result;
+  }
+
+  // Complement of zip. Unzip accepts an array of arrays and groups
+  // each array's elements on shared indices.
+  function unzip(array) {
+    var length = array && max(array, getLength).length || 0;
+    var result = Array(length);
+
+    for (var index = 0; index < length; index++) {
+      result[index] = pluck(array, index);
+    }
+    return result;
+  }
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  var zip = restArguments(unzip);
+
+  // Converts lists into objects. Pass either a single array of `[key, value]`
+  // pairs, or two parallel arrays of the same length -- one of keys, and one of
+  // the corresponding values. Passing by pairs is the reverse of `_.pairs`.
+  function object(list, values) {
+    var result = {};
+    for (var i = 0, length = getLength(list); i < length; i++) {
+      if (values) {
+        result[list[i]] = values[i];
+      } else {
+        result[list[i][0]] = list[i][1];
+      }
+    }
+    return result;
+  }
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python `range()` function. See
+  // [the Python documentation](https://docs.python.org/library/functions.html#range).
+  function range(start, stop, step) {
+    if (stop == null) {
+      stop = start || 0;
+      start = 0;
+    }
+    if (!step) {
+      step = stop < start ? -1 : 1;
+    }
+
+    var length = Math.max(Math.ceil((stop - start) / step), 0);
+    var range = Array(length);
+
+    for (var idx = 0; idx < length; idx++, start += step) {
+      range[idx] = start;
+    }
+
+    return range;
+  }
+
+  // Chunk a single array into multiple arrays, each containing `count` or fewer
+  // items.
+  function chunk(array, count) {
+    if (count == null || count < 1) return [];
+    var result = [];
+    var i = 0, length = array.length;
+    while (i < length) {
+      result.push(slice.call(array, i, i += count));
+    }
+    return result;
+  }
 
   // Helper function to continue chaining intermediate results.
-  var chainResult = function(instance, obj) {
-    return instance._chain ? _(obj).chain() : obj;
-  };
+  function chainResult(instance, obj) {
+    return instance._chain ? _$1(obj).chain() : obj;
+  }
 
   // Add your own custom functions to the Underscore object.
-  _.mixin = function(obj) {
-    _.each(_.functions(obj), function(name) {
-      var func = _[name] = obj[name];
-      _.prototype[name] = function() {
+  function mixin(obj) {
+    each(functions(obj), function(name) {
+      var func = _$1[name] = obj[name];
+      _$1.prototype[name] = function() {
         var args = [this._wrapped];
         push.apply(args, arguments);
-        return chainResult(this, func.apply(_, args));
+        return chainResult(this, func.apply(_$1, args));
       };
     });
-    return _;
-  };
-
-  // Add all of the Underscore functions to the wrapper object.
-  _.mixin(_);
+    return _$1;
+  }
 
-  // Add all mutator Array functions to the wrapper.
-  _.each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+  // Add all mutator `Array` functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
     var method = ArrayProto[name];
-    _.prototype[name] = function() {
+    _$1.prototype[name] = function() {
       var obj = this._wrapped;
-      method.apply(obj, arguments);
-      if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];
+      if (obj != null) {
+        method.apply(obj, arguments);
+        if ((name === 'shift' || name === 'splice') && obj.length === 0) {
+          delete obj[0];
+        }
+      }
       return chainResult(this, obj);
     };
   });
 
-  // Add all accessor Array functions to the wrapper.
-  _.each(['concat', 'join', 'slice'], function(name) {
+  // Add all accessor `Array` functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
     var method = ArrayProto[name];
-    _.prototype[name] = function() {
-      return chainResult(this, method.apply(this._wrapped, arguments));
+    _$1.prototype[name] = function() {
+      var obj = this._wrapped;
+      if (obj != null) obj = method.apply(obj, arguments);
+      return chainResult(this, obj);
     };
   });
 
-  // Extracts the result from a wrapped and chained object.
-  _.prototype.value = function() {
-    return this._wrapped;
-  };
+  // Named Exports
+
+  var allExports = {
+    __proto__: null,
+    VERSION: VERSION,
+    restArguments: restArguments,
+    isObject: isObject,
+    isNull: isNull,
+    isUndefined: isUndefined,
+    isBoolean: isBoolean,
+    isElement: isElement,
+    isString: isString,
+    isNumber: isNumber,
+    isDate: isDate,
+    isRegExp: isRegExp,
+    isError: isError,
+    isSymbol: isSymbol,
+    isArrayBuffer: isArrayBuffer,
+    isDataView: isDataView$1,
+    isArray: isArray,
+    isFunction: isFunction$1,
+    isArguments: isArguments$1,
+    isFinite: isFinite$1,
+    isNaN: isNaN$1,
+    isTypedArray: isTypedArray$1,
+    isEmpty: isEmpty,
+    isMatch: isMatch,
+    isEqual: isEqual,
+    isMap: isMap,
+    isWeakMap: isWeakMap,
+    isSet: isSet,
+    isWeakSet: isWeakSet,
+    keys: keys,
+    allKeys: allKeys,
+    values: values,
+    pairs: pairs,
+    invert: invert,
+    functions: functions,
+    methods: functions,
+    extend: extend,
+    extendOwn: extendOwn,
+    assign: extendOwn,
+    defaults: defaults,
+    create: create,
+    clone: clone,
+    tap: tap,
+    get: get,
+    has: has,
+    mapObject: mapObject,
+    identity: identity,
+    constant: constant,
+    noop: noop,
+    toPath: toPath$1,
+    property: property,
+    propertyOf: propertyOf,
+    matcher: matcher,
+    matches: matcher,
+    times: times,
+    random: random,
+    now: now,
+    escape: _escape,
+    unescape: _unescape,
+    templateSettings: templateSettings,
+    template: template,
+    result: result,
+    uniqueId: uniqueId,
+    chain: chain,
+    iteratee: iteratee,
+    partial: partial,
+    bind: bind,
+    bindAll: bindAll,
+    memoize: memoize,
+    delay: delay,
+    defer: defer,
+    throttle: throttle,
+    debounce: debounce,
+    wrap: wrap,
+    negate: negate,
+    compose: compose,
+    after: after,
+    before: before,
+    once: once,
+    findKey: findKey,
+    findIndex: findIndex,
+    findLastIndex: findLastIndex,
+    sortedIndex: sortedIndex,
+    indexOf: indexOf,
+    lastIndexOf: lastIndexOf,
+    find: find,
+    detect: find,
+    findWhere: findWhere,
+    each: each,
+    forEach: each,
+    map: map,
+    collect: map,
+    reduce: reduce,
+    foldl: reduce,
+    inject: reduce,
+    reduceRight: reduceRight,
+    foldr: reduceRight,
+    filter: filter,
+    select: filter,
+    reject: reject,
+    every: every,
+    all: every,
+    some: some,
+    any: some,
+    contains: contains,
+    includes: contains,
+    include: contains,
+    invoke: invoke,
+    pluck: pluck,
+    where: where,
+    max: max,
+    min: min,
+    shuffle: shuffle,
+    sample: sample,
+    sortBy: sortBy,
+    groupBy: groupBy,
+    indexBy: indexBy,
+    countBy: countBy,
+    partition: partition,
+    toArray: toArray,
+    size: size,
+    pick: pick,
+    omit: omit,
+    first: first,
+    head: first,
+    take: first,
+    initial: initial,
+    last: last,
+    rest: rest,
+    tail: rest,
+    drop: rest,
+    compact: compact,
+    flatten: flatten,
+    without: without,
+    uniq: uniq,
+    unique: uniq,
+    union: union,
+    intersection: intersection,
+    difference: difference,
+    unzip: unzip,
+    transpose: unzip,
+    zip: zip,
+    object: object,
+    range: range,
+    chunk: chunk,
+    mixin: mixin,
+    'default': _$1
+  };
+
+  // Default Export
 
-  // Provide unwrapping proxy for some methods used in engine operations
-  // such as arithmetic and JSON stringification.
-  _.prototype.valueOf = _.prototype.toJSON = _.prototype.value;
+  // Add all of the Underscore functions to the wrapper object.
+  var _ = mixin(allExports);
+  // Legacy Node.js API.
+  _._ = _;
 
-  _.prototype.toString = function() {
-    return String(this._wrapped);
-  };
+  return _;
 
-  // AMD registration happens at the end for compatibility with AMD loaders
-  // that may not enforce next-turn semantics on modules. Even though general
-  // practice for AMD registration is to be anonymous, underscore registers
-  // as a named module because, like jQuery, it is a base library that is
-  // popular enough to be bundled in a third party lib, but not be part of
-  // an AMD load request. Those cases could generate an error when an
-  // anonymous define() is called outside of a loader request.
-  if (typeof define == 'function' && define.amd) {
-    define('underscore', [], function() {
-      return _;
-    });
-  }
-}());
+})));
+//# sourceMappingURL=underscore-umd.js.map