2 * Sizzle CSS Selector Engine v2.2.0-pre
5 * Copyright 2008, 2014 jQuery Foundation, Inc. and other contributors
6 * Released under the MIT license
7 * http://jquery.org/license
25 // Local document vars
35 // Instance-specific data
36 expando = "sizzle" + 1 * new Date(),
37 preferredDoc = window.document,
40 classCache = createCache(),
41 tokenCache = createCache(),
42 compilerCache = createCache(),
43 sortOrder = function( a, b ) {
50 // General-purpose constants
51 MAX_NEGATIVE = 1 << 31,
54 hasOwn = ({}).hasOwnProperty,
57 push_native = arr.push,
60 // Use a stripped-down indexOf as it's faster than native
61 // http://jsperf.com/thor-indexof-vs-for/5
62 indexOf = function( list, elem ) {
65 for ( ; i < len; i++ ) {
66 if ( list[i] === elem ) {
73 booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
75 // Regular expressions
77 // Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
78 whitespace = "[\\x20\\t\\r\\n\\f]",
79 // http://www.w3.org/TR/css3-syntax/#characters
80 characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
82 // Loosely modeled on CSS identifier characters
83 // An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
84 // Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
85 identifier = characterEncoding.replace( "w", "w#" ),
87 // Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
88 attributes = "\\[" + whitespace + "*(" + characterEncoding + ")(?:" + whitespace +
89 // Operator (capture 2)
90 "*([*^$|!~]?=)" + whitespace +
91 // "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
92 "*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
95 pseudos = ":(" + characterEncoding + ")(?:\\((" +
96 // To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
97 // 1. quoted (capture 3; capture 4 or capture 5)
98 "('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
99 // 2. simple (capture 6)
100 "((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
101 // 3. anything else (capture 2)
105 // Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
106 rwhitespace = new RegExp( whitespace + "+", "g" ),
107 rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
109 rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
110 rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
112 rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
114 rpseudo = new RegExp( pseudos ),
115 ridentifier = new RegExp( "^" + identifier + "$" ),
118 "ID": new RegExp( "^#(" + characterEncoding + ")" ),
119 "CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
120 "TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
121 "ATTR": new RegExp( "^" + attributes ),
122 "PSEUDO": new RegExp( "^" + pseudos ),
123 "CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
124 "*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
125 "*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
126 "bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
127 // For use in libraries implementing .is()
128 // We use this for POS matching in `select`
129 "needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
130 whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
133 rinputs = /^(?:input|select|textarea|button)$/i,
136 rnative = /^[^{]+\{\s*\[native \w/,
138 // Easily-parseable/retrievable ID or TAG or CLASS selectors
139 rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
144 // CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
145 runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
146 funescape = function( _, escaped, escapedWhitespace ) {
147 var high = "0x" + escaped - 0x10000;
148 // NaN means non-codepoint
149 // Support: Firefox<24
150 // Workaround erroneous numeric interpretation of +"0x"
151 return high !== high || escapedWhitespace ?
155 String.fromCharCode( high + 0x10000 ) :
156 // Supplemental Plane codepoint (surrogate pair)
157 String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
162 // Removing the function wrapper causes a "Permission Denied"
164 unloadHandler = function() {
168 // Optimize for push.apply( _, NodeList )
171 (arr = slice.call( preferredDoc.childNodes )),
172 preferredDoc.childNodes
174 // Support: Android<4.0
175 // Detect silently failing push.apply
176 arr[ preferredDoc.childNodes.length ].nodeType;
178 push = { apply: arr.length ?
180 // Leverage slice if possible
181 function( target, els ) {
182 push_native.apply( target, slice.call(els) );
186 // Otherwise append directly
187 function( target, els ) {
188 var j = target.length,
190 // Can't trust NodeList.length
191 while ( (target[j++] = els[i++]) ) {}
192 target.length = j - 1;
197 function Sizzle( selector, context, results, seed ) {
198 var match, elem, m, nodeType,
200 i, groups, old, nid, newContext, newSelector;
202 if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
203 setDocument( context );
206 context = context || document;
207 results = results || [];
208 nodeType = context.nodeType;
210 if ( typeof selector !== "string" || !selector ||
211 nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
216 if ( !seed && documentIsHTML ) {
218 // Try to shortcut find operations when possible (e.g., not under DocumentFragment)
219 if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
220 // Speed-up: Sizzle("#ID")
221 if ( (m = match[1]) ) {
222 if ( nodeType === 9 ) {
223 elem = context.getElementById( m );
224 // Check parentNode to catch when Blackberry 4.6 returns
225 // nodes that are no longer in the document (jQuery #6963)
226 if ( elem && elem.parentNode ) {
227 // Handle the case where IE, Opera, and Webkit return items
228 // by name instead of ID
229 if ( elem.id === m ) {
230 results.push( elem );
237 // Context is not a document
238 if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
239 contains( context, elem ) && elem.id === m ) {
240 results.push( elem );
245 // Speed-up: Sizzle("TAG")
246 } else if ( match[2] ) {
247 push.apply( results, context.getElementsByTagName( selector ) );
250 // Speed-up: Sizzle(".CLASS")
251 } else if ( (m = match[3]) && support.getElementsByClassName ) {
252 push.apply( results, context.getElementsByClassName( m ) );
258 if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
260 newContext = context;
261 newSelector = nodeType !== 1 && selector;
263 // qSA works strangely on Element-rooted queries
264 // We can work around this by specifying an extra ID on the root
265 // and working up from there (Thanks to Andrew Dupont for the technique)
266 // IE 8 doesn't work on object elements
267 if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
268 groups = tokenize( selector );
270 if ( (old = context.getAttribute("id")) ) {
271 nid = old.replace( rescape, "\\$&" );
273 context.setAttribute( "id", nid );
275 nid = "[id='" + nid + "'] ";
279 groups[i] = nid + toSelector( groups[i] );
281 newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
282 newSelector = groups.join(",");
288 newContext.querySelectorAll( newSelector )
294 context.removeAttribute("id");
302 return select( selector.replace( rtrim, "$1" ), context, results, seed );
306 * Create key-value caches of limited size
307 * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
308 * property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
309 * deleting the oldest entry
311 function createCache() {
314 function cache( key, value ) {
315 // Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
316 if ( keys.push( key + " " ) > Expr.cacheLength ) {
317 // Only keep the most recent entries
318 delete cache[ keys.shift() ];
320 return (cache[ key + " " ] = value);
326 * Mark a function for special use by Sizzle
327 * @param {Function} fn The function to mark
329 function markFunction( fn ) {
330 fn[ expando ] = true;
335 * Support testing using an element
336 * @param {Function} fn Passed the created div and expects a boolean result
338 function assert( fn ) {
339 var div = document.createElement("div");
346 // Remove from its parent by default
347 if ( div.parentNode ) {
348 div.parentNode.removeChild( div );
350 // release memory in IE
356 * Adds the same handler for all of the specified attrs
357 * @param {String} attrs Pipe-separated list of attributes
358 * @param {Function} handler The method that will be applied
360 function addHandle( attrs, handler ) {
361 var arr = attrs.split("|"),
365 Expr.attrHandle[ arr[i] ] = handler;
370 * Checks document order of two siblings
373 * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
375 function siblingCheck( a, b ) {
377 diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
378 ( ~b.sourceIndex || MAX_NEGATIVE ) -
379 ( ~a.sourceIndex || MAX_NEGATIVE );
381 // Use IE sourceIndex if available on both nodes
386 // Check if b follows a
388 while ( (cur = cur.nextSibling) ) {
399 * Returns a function to use in pseudos for input types
400 * @param {String} type
402 function createInputPseudo( type ) {
403 return function( elem ) {
404 var name = elem.nodeName.toLowerCase();
405 return name === "input" && elem.type === type;
410 * Returns a function to use in pseudos for buttons
411 * @param {String} type
413 function createButtonPseudo( type ) {
414 return function( elem ) {
415 var name = elem.nodeName.toLowerCase();
416 return (name === "input" || name === "button") && elem.type === type;
421 * Returns a function to use in pseudos for positionals
422 * @param {Function} fn
424 function createPositionalPseudo( fn ) {
425 return markFunction(function( argument ) {
426 argument = +argument;
427 return markFunction(function( seed, matches ) {
429 matchIndexes = fn( [], seed.length, argument ),
430 i = matchIndexes.length;
432 // Match elements found at the specified indexes
434 if ( seed[ (j = matchIndexes[i]) ] ) {
435 seed[j] = !(matches[j] = seed[j]);
443 * Checks a node for validity as a Sizzle context
444 * @param {Element|Object=} context
445 * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
447 function testContext( context ) {
448 return context && typeof context.getElementsByTagName !== "undefined" && context;
451 // Expose support vars for convenience
452 support = Sizzle.support = {};
456 * @param {Element|Object} elem An element or a document
457 * @returns {Boolean} True iff elem is a non-HTML XML node
459 isXML = Sizzle.isXML = function( elem ) {
460 // documentElement is verified for cases where it doesn't yet exist
461 // (such as loading iframes in IE - #4833)
462 var documentElement = elem && (elem.ownerDocument || elem).documentElement;
463 return documentElement ? documentElement.nodeName !== "HTML" : false;
467 * Sets document-related variables once based on the current document
468 * @param {Element|Object} [doc] An element or document object to use to set the document
469 * @returns {Object} Returns the current document
471 setDocument = Sizzle.setDocument = function( node ) {
472 var hasCompare, parent,
473 doc = node ? node.ownerDocument || node : preferredDoc;
475 // If no document and documentElement is available, return
476 if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
482 docElem = doc.documentElement;
483 parent = doc.defaultView;
486 // If iframe document is assigned to "document" variable and if iframe has been reloaded,
487 // IE will throw "permission denied" error when accessing "document" variable, see jQuery #13936
488 // IE6-8 do not support the defaultView property so parent will be undefined
489 if ( parent && parent !== parent.top ) {
490 // IE11 does not have attachEvent, so all must suffer
491 if ( parent.addEventListener ) {
492 parent.addEventListener( "unload", unloadHandler, false );
493 } else if ( parent.attachEvent ) {
494 parent.attachEvent( "onunload", unloadHandler );
499 ---------------------------------------------------------------------- */
500 documentIsHTML = !isXML( doc );
503 ---------------------------------------------------------------------- */
506 // Verify that getAttribute really returns attributes and not properties
507 // (excepting IE8 booleans)
508 support.attributes = assert(function( div ) {
510 return !div.getAttribute("className");
514 ---------------------------------------------------------------------- */
516 // Check if getElementsByTagName("*") returns only elements
517 support.getElementsByTagName = assert(function( div ) {
518 div.appendChild( doc.createComment("") );
519 return !div.getElementsByTagName("*").length;
523 support.getElementsByClassName = rnative.test( doc.getElementsByClassName );
526 // Check if getElementById returns elements by name
527 // The broken getElementById methods don't pick up programatically-set names,
528 // so use a roundabout getElementsByName test
529 support.getById = assert(function( div ) {
530 docElem.appendChild( div ).id = expando;
531 return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
534 // ID find and filter
535 if ( support.getById ) {
536 Expr.find["ID"] = function( id, context ) {
537 if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
538 var m = context.getElementById( id );
539 // Check parentNode to catch when Blackberry 4.6 returns
540 // nodes that are no longer in the document #6963
541 return m && m.parentNode ? [ m ] : [];
544 Expr.filter["ID"] = function( id ) {
545 var attrId = id.replace( runescape, funescape );
546 return function( elem ) {
547 return elem.getAttribute("id") === attrId;
552 // getElementById is not reliable as a find shortcut
553 delete Expr.find["ID"];
555 Expr.filter["ID"] = function( id ) {
556 var attrId = id.replace( runescape, funescape );
557 return function( elem ) {
558 var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
559 return node && node.value === attrId;
565 Expr.find["TAG"] = support.getElementsByTagName ?
566 function( tag, context ) {
567 if ( typeof context.getElementsByTagName !== "undefined" ) {
568 return context.getElementsByTagName( tag );
570 // DocumentFragment nodes don't have gEBTN
571 } else if ( support.qsa ) {
572 return context.querySelectorAll( tag );
576 function( tag, context ) {
580 // By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
581 results = context.getElementsByTagName( tag );
583 // Filter out possible comments
585 while ( (elem = results[i++]) ) {
586 if ( elem.nodeType === 1 ) {
597 Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
598 if ( documentIsHTML ) {
599 return context.getElementsByClassName( className );
603 /* QSA/matchesSelector
604 ---------------------------------------------------------------------- */
606 // QSA and matchesSelector support
608 // matchesSelector(:active) reports false when true (IE9/Opera 11.5)
611 // qSa(:focus) reports false when true (Chrome 21)
612 // We allow this because of a bug in IE8/9 that throws an error
613 // whenever `document.activeElement` is accessed on an iframe
614 // So, we allow :focus to pass through QSA all the time to avoid the IE error
615 // See http://bugs.jquery.com/ticket/13378
618 if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
620 // Regex strategy adopted from Diego Perini
621 assert(function( div ) {
622 // Select is set to empty string on purpose
623 // This is to test IE's treatment of not explicitly
624 // setting a boolean content attribute,
625 // since its presence should be enough
626 // http://bugs.jquery.com/ticket/12359
627 docElem.appendChild( div ).innerHTML = "<a id='" + expando + "'></a>" +
628 "<select id='" + expando + "-\f]' msallowcapture=''>" +
629 "<option selected=''></option></select>";
631 // Support: IE8, Opera 11-12.16
632 // Nothing should be selected when empty strings follow ^= or $= or *=
633 // The test attribute must be unknown in Opera but "safe" for WinRT
634 // http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
635 if ( div.querySelectorAll("[msallowcapture^='']").length ) {
636 rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
640 // Boolean attributes and "value" are not treated correctly
641 if ( !div.querySelectorAll("[selected]").length ) {
642 rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
645 // Support: Chrome<29, Android<4.2+, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.7+
646 if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
647 rbuggyQSA.push("~=");
650 // Webkit/Opera - :checked should return selected option elements
651 // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
652 // IE8 throws error here and will not see later tests
653 if ( !div.querySelectorAll(":checked").length ) {
654 rbuggyQSA.push(":checked");
657 // Support: Safari 8+, iOS 8+
658 // https://bugs.webkit.org/show_bug.cgi?id=136851
659 // In-page `selector#id sibing-combinator selector` fails
660 if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
661 rbuggyQSA.push(".#.+[+~]");
665 assert(function( div ) {
666 // Support: Windows 8 Native Apps
667 // The type and name attributes are restricted during .innerHTML assignment
668 var input = doc.createElement("input");
669 input.setAttribute( "type", "hidden" );
670 div.appendChild( input ).setAttribute( "name", "D" );
673 // Enforce case-sensitivity of name attribute
674 if ( div.querySelectorAll("[name=d]").length ) {
675 rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
678 // FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
679 // IE8 throws error here and will not see later tests
680 if ( !div.querySelectorAll(":enabled").length ) {
681 rbuggyQSA.push( ":enabled", ":disabled" );
684 // Opera 10-11 does not throw on post-comma invalid pseudos
685 div.querySelectorAll("*,:x");
686 rbuggyQSA.push(",.*:");
690 if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
691 docElem.webkitMatchesSelector ||
692 docElem.mozMatchesSelector ||
693 docElem.oMatchesSelector ||
694 docElem.msMatchesSelector) )) ) {
696 assert(function( div ) {
697 // Check to see if it's possible to do matchesSelector
698 // on a disconnected node (IE 9)
699 support.disconnectedMatch = matches.call( div, "div" );
701 // This should fail with an exception
702 // Gecko does not error, returns false instead
703 matches.call( div, "[s!='']:x" );
704 rbuggyMatches.push( "!=", pseudos );
708 rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
709 rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
712 ---------------------------------------------------------------------- */
713 hasCompare = rnative.test( docElem.compareDocumentPosition );
715 // Element contains another
716 // Purposefully does not implement inclusive descendent
717 // As in, an element does not contain itself
718 contains = hasCompare || rnative.test( docElem.contains ) ?
720 var adown = a.nodeType === 9 ? a.documentElement : a,
721 bup = b && b.parentNode;
722 return a === bup || !!( bup && bup.nodeType === 1 && (
724 adown.contains( bup ) :
725 a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
730 while ( (b = b.parentNode) ) {
740 ---------------------------------------------------------------------- */
742 // Document order sorting
743 sortOrder = hasCompare ?
746 // Flag for duplicate removal
752 // Sort on method existence if only one input has compareDocumentPosition
753 var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
758 // Calculate position if both inputs belong to the same document
759 compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
760 a.compareDocumentPosition( b ) :
762 // Otherwise we know they are disconnected
765 // Disconnected nodes
767 (!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
769 // Choose the first element that is related to our preferred document
770 if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
773 if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
777 // Maintain original order
779 ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
783 return compare & 4 ? -1 : 1;
786 // Exit early if the nodes are identical
799 // Parentless nodes are either documents or disconnected
800 if ( !aup || !bup ) {
801 return a === doc ? -1 :
806 ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
809 // If the nodes are siblings, we can do a quick check
810 } else if ( aup === bup ) {
811 return siblingCheck( a, b );
814 // Otherwise we need full lists of their ancestors for comparison
816 while ( (cur = cur.parentNode) ) {
820 while ( (cur = cur.parentNode) ) {
824 // Walk down the tree looking for a discrepancy
825 while ( ap[i] === bp[i] ) {
830 // Do a sibling check if the nodes have a common ancestor
831 siblingCheck( ap[i], bp[i] ) :
833 // Otherwise nodes in our document sort first
834 ap[i] === preferredDoc ? -1 :
835 bp[i] === preferredDoc ? 1 :
842 Sizzle.matches = function( expr, elements ) {
843 return Sizzle( expr, null, null, elements );
846 Sizzle.matchesSelector = function( elem, expr ) {
847 // Set document vars if needed
848 if ( ( elem.ownerDocument || elem ) !== document ) {
852 // Make sure that attribute selectors are quoted
853 expr = expr.replace( rattributeQuotes, "='$1']" );
855 if ( support.matchesSelector && documentIsHTML &&
856 ( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
857 ( !rbuggyQSA || !rbuggyQSA.test( expr ) ) ) {
860 var ret = matches.call( elem, expr );
862 // IE 9's matchesSelector returns false on disconnected nodes
863 if ( ret || support.disconnectedMatch ||
864 // As well, disconnected nodes are said to be in a document
866 elem.document && elem.document.nodeType !== 11 ) {
872 return Sizzle( expr, document, null, [ elem ] ).length > 0;
875 Sizzle.contains = function( context, elem ) {
876 // Set document vars if needed
877 if ( ( context.ownerDocument || context ) !== document ) {
878 setDocument( context );
880 return contains( context, elem );
883 Sizzle.attr = function( elem, name ) {
884 // Set document vars if needed
885 if ( ( elem.ownerDocument || elem ) !== document ) {
889 var fn = Expr.attrHandle[ name.toLowerCase() ],
890 // Don't get fooled by Object.prototype properties (jQuery #13807)
891 val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
892 fn( elem, name, !documentIsHTML ) :
895 return val !== undefined ?
897 support.attributes || !documentIsHTML ?
898 elem.getAttribute( name ) :
899 (val = elem.getAttributeNode(name)) && val.specified ?
904 Sizzle.error = function( msg ) {
905 throw new Error( "Syntax error, unrecognized expression: " + msg );
909 * Document sorting and removing duplicates
910 * @param {ArrayLike} results
912 Sizzle.uniqueSort = function( results ) {
918 // Unless we *know* we can detect duplicates, assume their presence
919 hasDuplicate = !support.detectDuplicates;
920 sortInput = !support.sortStable && results.slice( 0 );
921 results.sort( sortOrder );
923 if ( hasDuplicate ) {
924 while ( (elem = results[i++]) ) {
925 if ( elem === results[ i ] ) {
926 j = duplicates.push( i );
930 results.splice( duplicates[ j ], 1 );
934 // Clear input after sorting to release objects
935 // See https://github.com/jquery/sizzle/pull/225
942 * Utility function for retrieving the text value of an array of DOM nodes
943 * @param {Array|Element} elem
945 getText = Sizzle.getText = function( elem ) {
949 nodeType = elem.nodeType;
952 // If no nodeType, this is expected to be an array
953 while ( (node = elem[i++]) ) {
954 // Do not traverse comment nodes
955 ret += getText( node );
957 } else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
958 // Use textContent for elements
959 // innerText usage removed for consistency of new lines (jQuery #11153)
960 if ( typeof elem.textContent === "string" ) {
961 return elem.textContent;
963 // Traverse its children
964 for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
965 ret += getText( elem );
968 } else if ( nodeType === 3 || nodeType === 4 ) {
969 return elem.nodeValue;
971 // Do not include comment or processing instruction nodes
976 Expr = Sizzle.selectors = {
978 // Can be adjusted by the user
981 createPseudo: markFunction,
990 ">": { dir: "parentNode", first: true },
991 " ": { dir: "parentNode" },
992 "+": { dir: "previousSibling", first: true },
993 "~": { dir: "previousSibling" }
997 "ATTR": function( match ) {
998 match[1] = match[1].replace( runescape, funescape );
1000 // Move the given value to match[3] whether quoted or unquoted
1001 match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
1003 if ( match[2] === "~=" ) {
1004 match[3] = " " + match[3] + " ";
1007 return match.slice( 0, 4 );
1010 "CHILD": function( match ) {
1011 /* matches from matchExpr["CHILD"]
1012 1 type (only|nth|...)
1013 2 what (child|of-type)
1014 3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
1015 4 xn-component of xn+y argument ([+-]?\d*n|)
1016 5 sign of xn-component
1018 7 sign of y-component
1021 match[1] = match[1].toLowerCase();
1023 if ( match[1].slice( 0, 3 ) === "nth" ) {
1024 // nth-* requires argument
1026 Sizzle.error( match[0] );
1029 // numeric x and y parameters for Expr.filter.CHILD
1030 // remember that false/true cast respectively to 0/1
1031 match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
1032 match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
1034 // other types prohibit arguments
1035 } else if ( match[3] ) {
1036 Sizzle.error( match[0] );
1042 "PSEUDO": function( match ) {
1044 unquoted = !match[6] && match[2];
1046 if ( matchExpr["CHILD"].test( match[0] ) ) {
1050 // Accept quoted arguments as-is
1052 match[2] = match[4] || match[5] || "";
1054 // Strip excess characters from unquoted arguments
1055 } else if ( unquoted && rpseudo.test( unquoted ) &&
1056 // Get excess from tokenize (recursively)
1057 (excess = tokenize( unquoted, true )) &&
1058 // advance to the next closing parenthesis
1059 (excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
1061 // excess is a negative index
1062 match[0] = match[0].slice( 0, excess );
1063 match[2] = unquoted.slice( 0, excess );
1066 // Return only captures needed by the pseudo filter method (type and argument)
1067 return match.slice( 0, 3 );
1073 "TAG": function( nodeNameSelector ) {
1074 var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
1075 return nodeNameSelector === "*" ?
1076 function() { return true; } :
1078 return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
1082 "CLASS": function( className ) {
1083 var pattern = classCache[ className + " " ];
1086 (pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
1087 classCache( className, function( elem ) {
1088 return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
1092 "ATTR": function( name, operator, check ) {
1093 return function( elem ) {
1094 var result = Sizzle.attr( elem, name );
1096 if ( result == null ) {
1097 return operator === "!=";
1105 return operator === "=" ? result === check :
1106 operator === "!=" ? result !== check :
1107 operator === "^=" ? check && result.indexOf( check ) === 0 :
1108 operator === "*=" ? check && result.indexOf( check ) > -1 :
1109 operator === "$=" ? check && result.slice( -check.length ) === check :
1110 operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
1111 operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
1116 "CHILD": function( type, what, argument, first, last ) {
1117 var simple = type.slice( 0, 3 ) !== "nth",
1118 forward = type.slice( -4 ) !== "last",
1119 ofType = what === "of-type";
1121 return first === 1 && last === 0 ?
1123 // Shortcut for :nth-*(n)
1125 return !!elem.parentNode;
1128 function( elem, context, xml ) {
1129 var cache, outerCache, node, diff, nodeIndex, start,
1130 dir = simple !== forward ? "nextSibling" : "previousSibling",
1131 parent = elem.parentNode,
1132 name = ofType && elem.nodeName.toLowerCase(),
1133 useCache = !xml && !ofType;
1137 // :(first|last|only)-(child|of-type)
1141 while ( (node = node[ dir ]) ) {
1142 if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
1146 // Reverse direction for :only-* (if we haven't yet done so)
1147 start = dir = type === "only" && !start && "nextSibling";
1152 start = [ forward ? parent.firstChild : parent.lastChild ];
1154 // non-xml :nth-child(...) stores cache data on `parent`
1155 if ( forward && useCache ) {
1156 // Seek `elem` from a previously-cached index
1157 outerCache = parent[ expando ] || (parent[ expando ] = {});
1158 cache = outerCache[ type ] || [];
1159 nodeIndex = cache[0] === dirruns && cache[1];
1160 diff = cache[0] === dirruns && cache[2];
1161 node = nodeIndex && parent.childNodes[ nodeIndex ];
1163 while ( (node = ++nodeIndex && node && node[ dir ] ||
1165 // Fallback to seeking `elem` from the start
1166 (diff = nodeIndex = 0) || start.pop()) ) {
1168 // When found, cache indexes on `parent` and break
1169 if ( node.nodeType === 1 && ++diff && node === elem ) {
1170 outerCache[ type ] = [ dirruns, nodeIndex, diff ];
1175 // Use previously-cached element index if available
1176 } else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
1179 // xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
1181 // Use the same loop as above to seek `elem` from the start
1182 while ( (node = ++nodeIndex && node && node[ dir ] ||
1183 (diff = nodeIndex = 0) || start.pop()) ) {
1185 if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
1186 // Cache the index of each encountered element
1188 (node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
1191 if ( node === elem ) {
1198 // Incorporate the offset, then check against cycle size
1200 return diff === first || ( diff % first === 0 && diff / first >= 0 );
1205 "PSEUDO": function( pseudo, argument ) {
1206 // pseudo-class names are case-insensitive
1207 // http://www.w3.org/TR/selectors/#pseudo-classes
1208 // Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
1209 // Remember that setFilters inherits from pseudos
1211 fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
1212 Sizzle.error( "unsupported pseudo: " + pseudo );
1214 // The user may use createPseudo to indicate that
1215 // arguments are needed to create the filter function
1216 // just as Sizzle does
1217 if ( fn[ expando ] ) {
1218 return fn( argument );
1221 // But maintain support for old signatures
1222 if ( fn.length > 1 ) {
1223 args = [ pseudo, pseudo, "", argument ];
1224 return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
1225 markFunction(function( seed, matches ) {
1227 matched = fn( seed, argument ),
1230 idx = indexOf( seed, matched[i] );
1231 seed[ idx ] = !( matches[ idx ] = matched[i] );
1235 return fn( elem, 0, args );
1244 // Potentially complex pseudos
1245 "not": markFunction(function( selector ) {
1246 // Trim the selector passed to compile
1247 // to avoid treating leading and trailing
1248 // spaces as combinators
1251 matcher = compile( selector.replace( rtrim, "$1" ) );
1253 return matcher[ expando ] ?
1254 markFunction(function( seed, matches, context, xml ) {
1256 unmatched = matcher( seed, null, xml, [] ),
1259 // Match elements unmatched by `matcher`
1261 if ( (elem = unmatched[i]) ) {
1262 seed[i] = !(matches[i] = elem);
1266 function( elem, context, xml ) {
1268 matcher( input, null, xml, results );
1269 // Don't keep the element (issue #299)
1271 return !results.pop();
1275 "has": markFunction(function( selector ) {
1276 return function( elem ) {
1277 return Sizzle( selector, elem ).length > 0;
1281 "contains": markFunction(function( text ) {
1282 text = text.replace( runescape, funescape );
1283 return function( elem ) {
1284 return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
1288 // "Whether an element is represented by a :lang() selector
1289 // is based solely on the element's language value
1290 // being equal to the identifier C,
1291 // or beginning with the identifier C immediately followed by "-".
1292 // The matching of C against the element's language value is performed case-insensitively.
1293 // The identifier C does not have to be a valid language name."
1294 // http://www.w3.org/TR/selectors/#lang-pseudo
1295 "lang": markFunction( function( lang ) {
1296 // lang value must be a valid identifier
1297 if ( !ridentifier.test(lang || "") ) {
1298 Sizzle.error( "unsupported lang: " + lang );
1300 lang = lang.replace( runescape, funescape ).toLowerCase();
1301 return function( elem ) {
1304 if ( (elemLang = documentIsHTML ?
1306 elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
1308 elemLang = elemLang.toLowerCase();
1309 return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
1311 } while ( (elem = elem.parentNode) && elem.nodeType === 1 );
1317 "target": function( elem ) {
1318 var hash = window.location && window.location.hash;
1319 return hash && hash.slice( 1 ) === elem.id;
1322 "root": function( elem ) {
1323 return elem === docElem;
1326 "focus": function( elem ) {
1327 return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
1330 // Boolean properties
1331 "enabled": function( elem ) {
1332 return elem.disabled === false;
1335 "disabled": function( elem ) {
1336 return elem.disabled === true;
1339 "checked": function( elem ) {
1340 // In CSS3, :checked should return both checked and selected elements
1341 // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
1342 var nodeName = elem.nodeName.toLowerCase();
1343 return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
1346 "selected": function( elem ) {
1347 // Accessing this property makes selected-by-default
1348 // options in Safari work properly
1349 if ( elem.parentNode ) {
1350 elem.parentNode.selectedIndex;
1353 return elem.selected === true;
1357 "empty": function( elem ) {
1358 // http://www.w3.org/TR/selectors/#empty-pseudo
1359 // :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
1360 // but not by others (comment: 8; processing instruction: 7; etc.)
1361 // nodeType < 6 works because attributes (2) do not appear as children
1362 for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
1363 if ( elem.nodeType < 6 ) {
1370 "parent": function( elem ) {
1371 return !Expr.pseudos["empty"]( elem );
1374 // Element/input types
1375 "header": function( elem ) {
1376 return rheader.test( elem.nodeName );
1379 "input": function( elem ) {
1380 return rinputs.test( elem.nodeName );
1383 "button": function( elem ) {
1384 var name = elem.nodeName.toLowerCase();
1385 return name === "input" && elem.type === "button" || name === "button";
1388 "text": function( elem ) {
1390 return elem.nodeName.toLowerCase() === "input" &&
1391 elem.type === "text" &&
1394 // New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
1395 ( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
1398 // Position-in-collection
1399 "first": createPositionalPseudo(function() {
1403 "last": createPositionalPseudo(function( matchIndexes, length ) {
1404 return [ length - 1 ];
1407 "eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
1408 return [ argument < 0 ? argument + length : argument ];
1411 "even": createPositionalPseudo(function( matchIndexes, length ) {
1413 for ( ; i < length; i += 2 ) {
1414 matchIndexes.push( i );
1416 return matchIndexes;
1419 "odd": createPositionalPseudo(function( matchIndexes, length ) {
1421 for ( ; i < length; i += 2 ) {
1422 matchIndexes.push( i );
1424 return matchIndexes;
1427 "lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
1428 var i = argument < 0 ? argument + length : argument;
1429 for ( ; --i >= 0; ) {
1430 matchIndexes.push( i );
1432 return matchIndexes;
1435 "gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
1436 var i = argument < 0 ? argument + length : argument;
1437 for ( ; ++i < length; ) {
1438 matchIndexes.push( i );
1440 return matchIndexes;
1445 Expr.pseudos["nth"] = Expr.pseudos["eq"];
1447 // Add button/input type pseudos
1448 for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
1449 Expr.pseudos[ i ] = createInputPseudo( i );
1451 for ( i in { submit: true, reset: true } ) {
1452 Expr.pseudos[ i ] = createButtonPseudo( i );
1455 // Easy API for creating new setFilters
1456 function setFilters() {}
1457 setFilters.prototype = Expr.filters = Expr.pseudos;
1458 Expr.setFilters = new setFilters();
1460 tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
1461 var matched, match, tokens, type,
1462 soFar, groups, preFilters,
1463 cached = tokenCache[ selector + " " ];
1466 return parseOnly ? 0 : cached.slice( 0 );
1471 preFilters = Expr.preFilter;
1475 // Comma and first run
1476 if ( !matched || (match = rcomma.exec( soFar )) ) {
1478 // Don't consume trailing commas as valid
1479 soFar = soFar.slice( match[0].length ) || soFar;
1481 groups.push( (tokens = []) );
1487 if ( (match = rcombinators.exec( soFar )) ) {
1488 matched = match.shift();
1491 // Cast descendant combinators to space
1492 type: match[0].replace( rtrim, " " )
1494 soFar = soFar.slice( matched.length );
1498 for ( type in Expr.filter ) {
1499 if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
1500 (match = preFilters[ type ]( match ))) ) {
1501 matched = match.shift();
1507 soFar = soFar.slice( matched.length );
1516 // Return the length of the invalid excess
1517 // if we're just parsing
1518 // Otherwise, throw an error or return tokens
1522 Sizzle.error( selector ) :
1524 tokenCache( selector, groups ).slice( 0 );
1527 function toSelector( tokens ) {
1529 len = tokens.length,
1531 for ( ; i < len; i++ ) {
1532 selector += tokens[i].value;
1537 function addCombinator( matcher, combinator, base ) {
1538 var dir = combinator.dir,
1539 checkNonElements = base && dir === "parentNode",
1542 return combinator.first ?
1543 // Check against closest ancestor/preceding element
1544 function( elem, context, xml ) {
1545 while ( (elem = elem[ dir ]) ) {
1546 if ( elem.nodeType === 1 || checkNonElements ) {
1547 return matcher( elem, context, xml );
1552 // Check against all ancestor/preceding elements
1553 function( elem, context, xml ) {
1554 var oldCache, outerCache,
1555 newCache = [ dirruns, doneName ];
1557 // We can't set arbitrary data on XML nodes, so they don't benefit from dir caching
1559 while ( (elem = elem[ dir ]) ) {
1560 if ( elem.nodeType === 1 || checkNonElements ) {
1561 if ( matcher( elem, context, xml ) ) {
1567 while ( (elem = elem[ dir ]) ) {
1568 if ( elem.nodeType === 1 || checkNonElements ) {
1569 outerCache = elem[ expando ] || (elem[ expando ] = {});
1570 if ( (oldCache = outerCache[ dir ]) &&
1571 oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
1573 // Assign to newCache so results back-propagate to previous elements
1574 return (newCache[ 2 ] = oldCache[ 2 ]);
1576 // Reuse newcache so results back-propagate to previous elements
1577 outerCache[ dir ] = newCache;
1579 // A match means we're done; a fail means we have to keep checking
1580 if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
1590 function elementMatcher( matchers ) {
1591 return matchers.length > 1 ?
1592 function( elem, context, xml ) {
1593 var i = matchers.length;
1595 if ( !matchers[i]( elem, context, xml ) ) {
1604 function multipleContexts( selector, contexts, results ) {
1606 len = contexts.length;
1607 for ( ; i < len; i++ ) {
1608 Sizzle( selector, contexts[i], results );
1613 function condense( unmatched, map, filter, context, xml ) {
1617 len = unmatched.length,
1618 mapped = map != null;
1620 for ( ; i < len; i++ ) {
1621 if ( (elem = unmatched[i]) ) {
1622 if ( !filter || filter( elem, context, xml ) ) {
1623 newUnmatched.push( elem );
1631 return newUnmatched;
1634 function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
1635 if ( postFilter && !postFilter[ expando ] ) {
1636 postFilter = setMatcher( postFilter );
1638 if ( postFinder && !postFinder[ expando ] ) {
1639 postFinder = setMatcher( postFinder, postSelector );
1641 return markFunction(function( seed, results, context, xml ) {
1645 preexisting = results.length,
1647 // Get initial elements from seed or context
1648 elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
1650 // Prefilter to get matcher input, preserving a map for seed-results synchronization
1651 matcherIn = preFilter && ( seed || !selector ) ?
1652 condense( elems, preMap, preFilter, context, xml ) :
1655 matcherOut = matcher ?
1656 // If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
1657 postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
1659 // ...intermediate processing is necessary
1662 // ...otherwise use results directly
1666 // Find primary matches
1668 matcher( matcherIn, matcherOut, context, xml );
1673 temp = condense( matcherOut, postMap );
1674 postFilter( temp, [], context, xml );
1676 // Un-match failing elements by moving them back to matcherIn
1679 if ( (elem = temp[i]) ) {
1680 matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
1686 if ( postFinder || preFilter ) {
1688 // Get the final matcherOut by condensing this intermediate into postFinder contexts
1690 i = matcherOut.length;
1692 if ( (elem = matcherOut[i]) ) {
1693 // Restore matcherIn since elem is not yet a final match
1694 temp.push( (matcherIn[i] = elem) );
1697 postFinder( null, (matcherOut = []), temp, xml );
1700 // Move matched elements from seed to results to keep them synchronized
1701 i = matcherOut.length;
1703 if ( (elem = matcherOut[i]) &&
1704 (temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
1706 seed[temp] = !(results[temp] = elem);
1711 // Add elements to results, through postFinder if defined
1713 matcherOut = condense(
1714 matcherOut === results ?
1715 matcherOut.splice( preexisting, matcherOut.length ) :
1719 postFinder( null, results, matcherOut, xml );
1721 push.apply( results, matcherOut );
1727 function matcherFromTokens( tokens ) {
1728 var checkContext, matcher, j,
1729 len = tokens.length,
1730 leadingRelative = Expr.relative[ tokens[0].type ],
1731 implicitRelative = leadingRelative || Expr.relative[" "],
1732 i = leadingRelative ? 1 : 0,
1734 // The foundational matcher ensures that elements are reachable from top-level context(s)
1735 matchContext = addCombinator( function( elem ) {
1736 return elem === checkContext;
1737 }, implicitRelative, true ),
1738 matchAnyContext = addCombinator( function( elem ) {
1739 return indexOf( checkContext, elem ) > -1;
1740 }, implicitRelative, true ),
1741 matchers = [ function( elem, context, xml ) {
1742 var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
1743 (checkContext = context).nodeType ?
1744 matchContext( elem, context, xml ) :
1745 matchAnyContext( elem, context, xml ) );
1746 // Avoid hanging onto element (issue #299)
1747 checkContext = null;
1751 for ( ; i < len; i++ ) {
1752 if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
1753 matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
1755 matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
1757 // Return special upon seeing a positional matcher
1758 if ( matcher[ expando ] ) {
1759 // Find the next relative operator (if any) for proper handling
1761 for ( ; j < len; j++ ) {
1762 if ( Expr.relative[ tokens[j].type ] ) {
1767 i > 1 && elementMatcher( matchers ),
1768 i > 1 && toSelector(
1769 // If the preceding token was a descendant combinator, insert an implicit any-element `*`
1770 tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
1771 ).replace( rtrim, "$1" ),
1773 i < j && matcherFromTokens( tokens.slice( i, j ) ),
1774 j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
1775 j < len && toSelector( tokens )
1778 matchers.push( matcher );
1782 return elementMatcher( matchers );
1785 function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
1786 var bySet = setMatchers.length > 0,
1787 byElement = elementMatchers.length > 0,
1788 superMatcher = function( seed, context, xml, results, outermost ) {
1789 var elem, j, matcher,
1792 unmatched = seed && [],
1794 contextBackup = outermostContext,
1795 // We must always have either seed elements or outermost context
1796 elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
1797 // Use integer dirruns iff this is the outermost matcher
1798 dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
1802 outermostContext = context !== document && context;
1805 // Add elements passing elementMatchers directly to results
1806 // Keep `i` a string if there are no elements so `matchedCount` will be "00" below
1807 // Support: IE<9, Safari
1808 // Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
1809 for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
1810 if ( byElement && elem ) {
1812 while ( (matcher = elementMatchers[j++]) ) {
1813 if ( matcher( elem, context, xml ) ) {
1814 results.push( elem );
1819 dirruns = dirrunsUnique;
1823 // Track unmatched elements for set filters
1825 // They will have gone through all possible matchers
1826 if ( (elem = !matcher && elem) ) {
1830 // Lengthen the array for every element, matched or not
1832 unmatched.push( elem );
1837 // Apply set filters to unmatched elements
1839 if ( bySet && i !== matchedCount ) {
1841 while ( (matcher = setMatchers[j++]) ) {
1842 matcher( unmatched, setMatched, context, xml );
1846 // Reintegrate element matches to eliminate the need for sorting
1847 if ( matchedCount > 0 ) {
1849 if ( !(unmatched[i] || setMatched[i]) ) {
1850 setMatched[i] = pop.call( results );
1855 // Discard index placeholder values to get only actual matches
1856 setMatched = condense( setMatched );
1859 // Add matches to results
1860 push.apply( results, setMatched );
1862 // Seedless set matches succeeding multiple successful matchers stipulate sorting
1863 if ( outermost && !seed && setMatched.length > 0 &&
1864 ( matchedCount + setMatchers.length ) > 1 ) {
1866 Sizzle.uniqueSort( results );
1870 // Override manipulation of globals by nested matchers
1872 dirruns = dirrunsUnique;
1873 outermostContext = contextBackup;
1880 markFunction( superMatcher ) :
1884 compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
1887 elementMatchers = [],
1888 cached = compilerCache[ selector + " " ];
1891 // Generate a function of recursive functions that can be used to check each element
1893 match = tokenize( selector );
1897 cached = matcherFromTokens( match[i] );
1898 if ( cached[ expando ] ) {
1899 setMatchers.push( cached );
1901 elementMatchers.push( cached );
1905 // Cache the compiled function
1906 cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
1908 // Save selector and tokenization
1909 cached.selector = selector;
1915 * A low-level selection function that works with Sizzle's compiled
1916 * selector functions
1917 * @param {String|Function} selector A selector or a pre-compiled
1918 * selector function built with Sizzle.compile
1919 * @param {Element} context
1920 * @param {Array} [results]
1921 * @param {Array} [seed] A set of elements to match against
1923 select = Sizzle.select = function( selector, context, results, seed ) {
1924 var i, tokens, token, type, find,
1925 compiled = typeof selector === "function" && selector,
1926 match = !seed && tokenize( (selector = compiled.selector || selector) );
1928 results = results || [];
1930 // Try to minimize operations if there is no seed and only one group
1931 if ( match.length === 1 ) {
1933 // Take a shortcut and set the context if the root selector is an ID
1934 tokens = match[0] = match[0].slice( 0 );
1935 if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
1936 support.getById && context.nodeType === 9 && documentIsHTML &&
1937 Expr.relative[ tokens[1].type ] ) {
1939 context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
1943 // Precompiled matchers will still verify ancestry, so step up a level
1944 } else if ( compiled ) {
1945 context = context.parentNode;
1948 selector = selector.slice( tokens.shift().value.length );
1951 // Fetch a seed set for right-to-left matching
1952 i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
1956 // Abort if we hit a combinator
1957 if ( Expr.relative[ (type = token.type) ] ) {
1960 if ( (find = Expr.find[ type ]) ) {
1961 // Search, expanding context for leading sibling combinators
1963 token.matches[0].replace( runescape, funescape ),
1964 rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
1967 // If seed is empty or no tokens remain, we can return early
1968 tokens.splice( i, 1 );
1969 selector = seed.length && toSelector( tokens );
1971 push.apply( results, seed );
1981 // Compile and execute a filtering function if one is not provided
1982 // Provide `match` to avoid retokenization if we modified the selector above
1983 ( compiled || compile( selector, match ) )(
1988 rsibling.test( selector ) && testContext( context.parentNode ) || context
1993 // One-time assignments
1996 support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
1998 // Support: Chrome 14-35+
1999 // Always assume duplicates if they aren't passed to the comparison function
2000 support.detectDuplicates = !!hasDuplicate;
2002 // Initialize against the default document
2005 // Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
2006 // Detached nodes confoundingly follow *each other*
2007 support.sortDetached = assert(function( div1 ) {
2008 // Should return 1, but returns 4 (following)
2009 return div1.compareDocumentPosition( document.createElement("div") ) & 1;
2013 // Prevent attribute/property "interpolation"
2014 // http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
2015 if ( !assert(function( div ) {
2016 div.innerHTML = "<a href='#'></a>";
2017 return div.firstChild.getAttribute("href") === "#" ;
2019 addHandle( "type|href|height|width", function( elem, name, isXML ) {
2021 return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
2027 // Use defaultValue in place of getAttribute("value")
2028 if ( !support.attributes || !assert(function( div ) {
2029 div.innerHTML = "<input/>";
2030 div.firstChild.setAttribute( "value", "" );
2031 return div.firstChild.getAttribute( "value" ) === "";
2033 addHandle( "value", function( elem, name, isXML ) {
2034 if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
2035 return elem.defaultValue;
2041 // Use getAttributeNode to fetch booleans when getAttribute lies
2042 if ( !assert(function( div ) {
2043 return div.getAttribute("disabled") == null;
2045 addHandle( booleans, function( elem, name, isXML ) {
2048 return elem[ name ] === true ? name.toLowerCase() :
2049 (val = elem.getAttributeNode( name )) && val.specified ?
2057 if ( typeof define === "function" && define.amd ) {
2058 define(function() { return Sizzle; });
2059 // Sizzle requires that there be a global window in Common-JS like environments
2060 } else if ( typeof module !== "undefined" && module.exports ) {
2061 module.exports = Sizzle;
2063 window.Sizzle = Sizzle;