jQuery v2.2.5的原始碼
阿新 • • 發佈:2018-11-02
/*! * jQuery JavaScript Library v2.2.5-pre b14ce54334a568eaaa107be4c441660a57c3db24 * http://jquery.com/ * * Includes Sizzle.js * http://sizzlejs.com/ * * Copyright jQuery Foundation and other contributors * Released under the MIT license * http://jquery.org/license * * Date: 2016-06-22T11:40Z */ (function (global, factory) { if (typeof module === "object" && typeof module.exports === "object") { // For CommonJS and CommonJS-like environments where a proper `window` // is present, execute the factory and get jQuery. // For environments that do not have a `window` with a `document` // (such as Node.js), expose a factory as module.exports. // This accentuates the need for the creation of a real `window`. // e.g. var jQuery = require("jquery")(window); // See ticket #14549 for more info. module.exports = global.document ? factory(global, true) : function (w) { if (!w.document) { throw new Error("jQuery requires a window with a document"); } return factory(w); }; } else { factory(global); } // Pass this if window is not defined yet }(typeof window !== "undefined" ? window : this, function (window, noGlobal) { // Support: Firefox 18+ // Can't be in strict mode, several libs including ASP.NET trace // the stack via arguments.caller.callee and Firefox dies if // you try to trace through "use strict" call chains. (#13335) //"use strict"; var arr = []; var document = window.document; var slice = arr.slice; var concat = arr.concat; var push = arr.push; var indexOf = arr.indexOf; var class2type = {}; var toString = class2type.toString; var hasOwn = class2type.hasOwnProperty; var support = {}; var version = "2.2.5-pre b14ce54334a568eaaa107be4c441660a57c3db24", // Define a local copy of jQuery jQuery = function (selector, context) { // 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<4.1 // Make sure we trim BOM and NBSP rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, // Matches dashed string for camelizing rmsPrefix = /^-ms-/, rdashAlpha = /-([\da-z])/gi, // Used by jQuery.camelCase as callback to replace() fcamelCase = function (all, letter) { return letter.toUpperCase(); }; jQuery.fn = jQuery.prototype = { // The current version of jQuery being used jquery: version, constructor: jQuery, // Start with an empty selector selector: "", // The default length of a jQuery object is 0 length: 0, toArray: function () { return slice.call(this); }, // Get the Nth element in the matched element set OR // Get the whole matched element set as a clean array get: function (num) { return num != null ? // Return just the one element from the set ( num < 0 ? this[num + this.length] : this[num] ) : // Return all the elements in a clean array slice.call(this); }, // Take an array of elements and push it onto the stack // (returning the new matched element set) pushStack: function (elems) { // Build a new jQuery matched element set var ret = jQuery.merge(this.constructor(), elems); // Add the old object onto the stack (as a reference) ret.prevObject = this; ret.context = this.context; // Return the newly-formed element set return ret; }, // Execute a callback for every element in the matched set. each: function (callback) { return jQuery.each(this, callback); }, map: function (callback) { return this.pushStack(jQuery.map(this, function (elem, i) { return callback.call(elem, i, elem); })); }, slice: function () { return this.pushStack(slice.apply(this, arguments)); }, first: function () { return this.eq(0); }, last: function () { return this.eq(-1); }, eq: function (i) { var len = this.length, j = +i + ( i < 0 ? len : 0 ); return this.pushStack(j >= 0 && j < len ? [this[j]] : []); }, end: function () { return this.prevObject || this.constructor(); }, // For internal use only. // Behaves like an Array's method, not like a jQuery method. push: push, sort: arr.sort, splice: arr.splice }; jQuery.extend = jQuery.fn.extend = function () { var options, name, src, copy, copyIsArray, clone, target = arguments[0] || {}, i = 1, length = arguments.length, deep = false; // Handle a deep copy situation if (typeof target === "boolean") { deep = target; // Skip the boolean and the target target = arguments[i] || {}; i++; } // Handle case when target is a string or something (possible in deep copy) if (typeof target !== "object" && !jQuery.isFunction(target)) { target = {}; } // Extend jQuery itself if only one argument is passed if (i === length) { target = this; i--; } for (; i < length; i++) { // Only deal with non-null/undefined values if (( options = arguments[i] ) != null) { // Extend the base object for (name in options) { src = target[name]; copy = options[name]; // Prevent never-ending loop if (target === copy) { continue; } // Recurse if we're merging plain objects or arrays if (deep && copy && ( jQuery.isPlainObject(copy) || ( copyIsArray = jQuery.isArray(copy) ) )) { if (copyIsArray) { copyIsArray = false; clone = src && jQuery.isArray(src) ? src : []; } else { clone = src && jQuery.isPlainObject(src) ? src : {}; } // Never move original objects, clone them target[name] = jQuery.extend(deep, clone, copy); // Don't bring in undefined values } else if (copy !== undefined) { target[name] = copy; } } } } // Return the modified object return target; }; jQuery.extend({ // Unique for each copy of jQuery on the page expando: "jQuery" + ( version + Math.random() ).replace(/\D/g, ""), // Assume jQuery is ready without the ready module isReady: true, error: function (msg) { throw new Error(msg); }, noop: function () { }, isFunction: function (obj) { return jQuery.type(obj) === "function"; }, isArray: Array.isArray, isWindow: function (obj) { return obj != null && obj === obj.window; }, isNumeric: function (obj) { // parseFloat NaNs numeric-cast false positives (null|true|false|"") // ...but misinterprets leading-number strings, particularly hex literals ("0x...") // subtraction forces infinities to NaN // adding 1 corrects loss of precision from parseFloat (#15100) var realStringObj = obj && obj.toString(); return !jQuery.isArray(obj) && ( realStringObj - parseFloat(realStringObj) + 1 ) >= 0; }, isPlainObject: function (obj) { var key; // Not plain objects: // - Any object or value whose internal [[Class]] property is not "[object Object]" // - DOM nodes // - window if (jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow(obj)) { return false; } // Not own constructor property must be Object if (obj.constructor && !hasOwn.call(obj, "constructor") && !hasOwn.call(obj.constructor.prototype || {}, "isPrototypeOf")) { return false; } // Own properties are enumerated firstly, so to speed up, // if last one is own, then all properties are own for (key in obj) { } return key === undefined || hasOwn.call(obj, key); }, isEmptyObject: function (obj) { var name; for (name in obj) { return false; } return true; }, type: function (obj) { if (obj == null) { return obj + ""; } // Support: Android<4.0, iOS<6 (functionish RegExp) return typeof obj === "object" || typeof obj === "function" ? class2type[toString.call(obj)] || "object" : typeof obj; }, // Evaluates a script in a global context globalEval: function (code) { var script, indirect = eval; code = jQuery.trim(code); if (code) { // If the code includes a valid, prologue position // strict mode pragma, execute code by injecting a // script tag into the document. if (code.indexOf("use strict") === 1) { script = document.createElement("script"); script.text = code; document.head.appendChild(script).parentNode.removeChild(script); } else { // Otherwise, avoid the DOM node creation, insertion // and removal by using an indirect global eval indirect(code); } } }, // Convert dashed to camelCase; used by the css and data modules // Support: IE9-11+ // Microsoft forgot to hump their vendor prefix (#9572) camelCase: function (string) { return string.replace(rmsPrefix, "ms-").replace(rdashAlpha, fcamelCase); }, nodeName: function (elem, name) { return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase(); }, each: function (obj, callback) { var length, i = 0; if (isArrayLike(obj)) { length = obj.length; for (; i < length; i++) { if (callback.call(obj[i], i, obj[i]) === false) { break; } } } else { for (i in obj) { if (callback.call(obj[i], i, obj[i]) === false) { break; } } } return obj; }, // Support: Android<4.1 trim: function (text) { return text == null ? "" : ( text + "" ).replace(rtrim, ""); }, // results is for internal usage only makeArray: function (arr, results) { var ret = results || []; if (arr != null) { if (isArrayLike(Object(arr))) { jQuery.merge(ret, typeof arr === "string" ? [arr] : arr ); } else { push.call(ret, arr); } } return ret; }, inArray: function (elem, arr, i) { return arr == null ? -1 : indexOf.call(arr, elem, i); }, merge: function (first, second) { var len = +second.length, j = 0, i = first.length; for (; j < len; j++) { first[i++] = second[j]; } first.length = i; return first; }, grep: function (elems, callback, invert) { var callbackInverse, matches = [], i = 0, length = elems.length, callbackExpect = !invert; // Go through the array, only saving the items // that pass the validator function for (; i < length; i++) { callbackInverse = !callback(elems[i], i); if (callbackInverse !== callbackExpect) { matches.push(elems[i]); } } return matches; }, // arg is for internal usage only map: function (elems, callback, arg) { var length, value, i = 0, ret = []; // Go through the array, translating each of the items to their new values if (isArrayLike(elems)) { length = elems.length; for (; i < length; i++) { value = callback(elems[i], i, arg); if (value != null) { ret.push(value); } } // Go through every key on the object, } else { for (i in elems) { value = callback(elems[i], i, arg); if (value != null) { ret.push(value); } } } // Flatten any nested arrays return concat.apply([], ret); }, // A global GUID counter for objects guid: 1, // Bind a function to a context, optionally partially applying any // arguments. proxy: function (fn, context) { var tmp, args, proxy; if (typeof context === "string") { tmp = fn[context]; context = fn; fn = tmp; } // Quick check to determine if target is callable, in the spec // this throws a TypeError, but we will just return undefined. if (!jQuery.isFunction(fn)) { return undefined; } // Simulated bind args = slice.call(arguments, 2); proxy = function () { return fn.apply(context || this, args.concat(slice.call(arguments))); }; // Set the guid of unique handler to the same of original handler, so it can be removed proxy.guid = fn.guid = fn.guid || jQuery.guid++; return proxy; }, now: Date.now, // jQuery.support is not used in Core but other projects attach their // properties to it so it needs to exist. support: support }); // JSHint would error on this code due to the Symbol not being defined in ES5. // Defining this global in .jshintrc would create a danger of using the global // unguarded in another place, it seems safer to just disable JSHint for these // three lines. /* jshint ignore: start */ if (typeof Symbol === "function") { jQuery.fn[Symbol.iterator] = arr[Symbol.iterator]; } /* jshint ignore: end */ // 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 isArrayLike(obj) { // Support: iOS 8.2 (not reproducible in simulator) // `in` check used to prevent JIT error (gh-2145) // hasOwn isn't used here due to false negatives // regarding Nodelist length in IE var length = !!obj && "length" in obj && obj.length, type = jQuery.type(obj); if (type === "function" || jQuery.isWindow(obj)) { return false; } return type === "array" || length === 0 || typeof length === "number" && length > 0 && ( length - 1 ) in obj; } var Sizzle = /*! * Sizzle CSS Selector Engine v2.2.1 * http://sizzlejs.com/ * * Copyright jQuery Foundation and other contributors * Released under the MIT license * http://jquery.org/license * * Date: 2015-10-17 */ (function (window) { var i, support, Expr, getText, isXML, tokenize, compile, select, outermostContext, sortInput, hasDuplicate, // Local document vars setDocument, document, docElem, documentIsHTML, rbuggyQSA, rbuggyMatches, matches, contains, // Instance-specific data expando = "sizzle" + 1 * new Date(), preferredDoc = window.document, dirruns = 0, done = 0, classCache = createCache(), tokenCache = createCache(), compilerCache = createCache(), sortOrder = function (a, b) { if (a === b) { hasDuplicate = true; } return 0; }, // General-purpose constants MAX_NEGATIVE = 1 << 31, // Instance methods hasOwn = ({}).hasOwnProperty, arr = [], pop = arr.pop, push_native = arr.push, push = arr.push, slice = arr.slice, // Use a stripped-down indexOf as it's faster than native // http://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) { return i; } } return -1; }, 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-]|[^\\x00-\\xa0])+", // 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 + "*\\]", 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 + "+$", "g"), rcomma = new RegExp("^" + whitespace + "*," + whitespace + "*"), rcombinators = new RegExp("^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*"), rattributeQuotes = new RegExp("=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g"), rpseudo = new RegExp(pseudos), ridentifier = new RegExp("^" + identifier + "$"), matchExpr = { "ID": new RegExp("^#(" + identifier + ")"), "CLASS": new RegExp("^\\.(" + identifier + ")"), "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"), "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") }, rinputs = /^(?:input|select|textarea|button)$/i, rheader = /^h\d$/i, rnative = /^[^{]+\{\s*\[native \w/, // Easily-parseable/retrievable ID or TAG or CLASS selectors rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/, rsibling = /[+~]/, rescape = /'|\\/g, // 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 : high < 0 ? // BMP codepoint String.fromCharCode(high + 0x10000) : // Supplemental Plane codepoint (surrogate pair) String.fromCharCode(high >> 10 | 0xD800, high & 0x3FF | 0xDC00); }, // Used for iframes // See setDocument() // Removing the function wrapper causes a "Permission Denied" // error in IE unloadHandler = function () { setDocument(); }; // Optimize for push.apply( _, NodeList ) try { push.apply( (arr = slice.call(preferredDoc.childNodes)), preferredDoc.childNodes ); // Support: Android<4.0 // Detect silently failing push.apply 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)); } : // Support: IE<9 // Otherwise append directly function (target, els) { var j = target.length, i = 0; // Can't trust NodeList.length while ((target[j++] = els[i++])) { } target.length = j - 1; } }; } function Sizzle(selector, context, results, seed) { var m, i, elem, nid, nidselect, match, groups, newSelector, newContext = context && context.ownerDocument, // nodeType defaults to 9, since context defaults to document nodeType = context ? context.nodeType : 9; results = results || []; // Return early from calls with invalid selector or context if (typeof selector !== "string" || !selector || nodeType !== 1 && nodeType !== 9 && nodeType !== 11) { return results; } // Try to shortcut find operations (as opposed to filters) in HTML documents if (!seed) { if (( context ? context.ownerDocument || context : preferredDoc ) !== document) { 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))) { // ID selector if ((m = match[1])) { // Document context if (nodeType === 9) { if ((elem = context.getElementById(m))) { // Support: IE, Opera, Webkit // TODO: identify versions // getElementById can match elements by name instead of ID if (elem.id === m) { results.push(elem); return results; } } else { return results; } // Element context } else { // Support: IE, Opera, Webkit // TODO: identify versions // getElementById can match elements by name instead of ID if (newContext && (elem = newContext.getElementById(m)) && contains(context, elem) && elem.id === m) { results.push(elem); return results; } } // Type selector } else if (match[2]) { push.apply(results, context.getElementsByTagName(selector)); return results; // Class selector } else if ((m = match[3]) && support.getElementsByClassName && context.getElementsByClassName) { push.apply(results, context.getElementsByClassName(m)); return results; } } // Take advantage of querySelectorAll if (support.qsa && !compilerCache[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 // Exclude object elements } else if (context.nodeName.toLowerCase() !== "object") { // Capture the context ID, setting it first if necessary if ((nid = context.getAttribute("id"))) { nid = nid.replace(rescape, "\\$&"); } else { context.setAttribute("id", (nid = expando)); } // Prefix every selector in the list groups = tokenize(selector); i = groups.length; nidselect = ridentifier.test(nid) ? "#" + nid : "[id='" + nid + "']"; while (i--) { groups[i] = nidselect + " " + 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"); } } } } } } // All others return select(selector.replace(rtrim, "$1"), context, results, seed); } /** * Create key-value caches of limited size * @returns {function(string, object)} Returns the Object data after storing it on itself with * property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength) * deleting the oldest entry */ 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; } /** * Mark a function for special use by Sizzle * @param {Function} fn The function to mark */ function markFunction(fn) { fn[expando] = true; return fn; } /** * Support testing using an element * @param {Function} fn Passed the created div and expects a boolean result */ function assert(fn) { var div = document.createElement("div"); try { return !!fn(div); } catch (e) { return false; } finally { // Remove from its parent by default if (div.parentNode) { div.parentNode.removeChild(div); } // release memory in IE div = null; } } /** * Adds the same handler for all of the specified attrs * @param {String} attrs Pipe-separated list of attributes * @param {Function} handler The method that will be applied */ function addHandle(attrs, handler) { var arr = attrs.split("|"), i = arr.length; while (i--) { Expr.attrHandle[arr[i]] = handler; } } /** * Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b */ function siblingCheck(a, b) { var cur = b && a, diff = cur && a.nodeType === 1 && b.nodeType === 1 && ( ~b.sourceIndex || MAX_NEGATIVE ) - ( ~a.sourceIndex || MAX_NEGATIVE ); // Use IE sourceIndex if available on both nodes if (diff) { return diff; } // Check if b follows a if (cur) { while ((cur = cur.nextSibling)) { if (cur === b) { return -1; } } } return a ? 1 : -1; } /** * Returns a function to use in pseudos for input types * @param {String} type */ function createInputPseudo(type) { return function (elem) { var name = elem.nodeName.toLowerCase(); return name === "input" && elem.type === type; }; } /** * Returns a function to use in pseudos for buttons * @param {String} type */ function createButtonPseudo(type) { return function (elem) { var name = elem.nodeName.toLowerCase(); return (name === "input" || name === "button") && elem.type === type; }; } /** * Returns a function to use in pseudos for positionals * @param {Function} fn */ function createPositionalPseudo(fn) { return markFunction(function (argument) { argument = +argument; 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]); } } }); }); } /** * Checks a node for validity as a Sizzle context * @param {Element|Object=} context * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value */ function testContext(context) { return context && typeof context.getElementsByTagName !== "undefined" && context; } // Expose support vars for convenience support = Sizzle.support = {}; /** * Detects XML nodes * @param {Element|Object} elem An element or a document * @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; }; /** * Sets document-related variables once based on the current document * @param {Element|Object} [doc] An element or document object to use to set the document * @returns {Object} Returns the current document */ setDocument = Sizzle.setDocument = function (node) { var hasCompare, parent, doc = node ? node.ownerDocument || node : preferredDoc; // Return early if doc is invalid or already selected if (doc === document || doc.nodeType !== 9 || !doc.documentElement) { return document; } // Update global variables document = doc; docElem = document.documentElement; documentIsHTML = !isXML(document); // Support: IE 9-11, Edge // Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936) if ((parent = document.defaultView) && parent.top !== parent) { // Support: IE 11 if (parent.addEventListener) { parent.addEventListener("unload", unloadHandler, false); // Support: IE 9 - 10 only } else if (parent.attachEvent) { parent.attachEvent("onunload", unloadHandler); } } /* Attributes ---------------------------------------------------------------------- */ // Support: IE<8 // Verify that getAttribute really returns attributes and not properties // (excepting IE8 booleans) support.attributes = assert(function (div) { div.className = "i"; return !div.getAttribute("className"); }); /* getElement(s)By* ---------------------------------------------------------------------- */ // Check if getElementsByTagName("*") returns only elements support.getElementsByTagName = assert(function (div) { div.appendChild(document.createComment("")); return !div.getElementsByTagName("*").length; }); // Support: IE<9 support.getElementsByClassName = rnative.test(document.getElementsByClassName); // Support: IE<10 // Check if getElementById returns elements by name // The broken getElementById methods don't pick up programatically-set names, // so use a roundabout getElementsByName test support.getById = assert(function (div) { docElem.appendChild(div).id = expando; return !document.getElementsByName || !document.getElementsByName(expando).length; }); // ID find and filter if (support.getById) { Expr.find["ID"] = function (id, context) { if (typeof context.getElementById !== "undefined" && documentIsHTML) { var m = context.getElementById(id); return m ? [m] : []; } }; Expr.filter["ID"] = function (id) { var attrId = id.replace(runescape, funescape); return function (elem) { return elem.getAttribute("id") === attrId; }; }; } else { // Support: IE6/7 // getElementById is not reliable as a find shortcut delete Expr.find["ID"]; Expr.filter["ID"] = function (id) { var attrId = id.replace(runescape, funescape); return function (elem) { var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id"); return node && node.value === attrId; }; }; } // Tag Expr.find["TAG"] = support.getElementsByTagName ? function (tag, context) { if (typeof context.getElementsByTagName !== "undefined") { return context.getElementsByTagName(tag); // DocumentFragment nodes don't have gEBTN } else if (support.qsa) { return context.querySelectorAll(tag); } } : function (tag, context) { 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++])) { if (elem.nodeType === 1) { tmp.push(elem); } } return tmp; } return results; }; // Class Expr.find["CLASS"] = support.getElementsByClassName && function (className, context) { if (typeof context.getElementsByClassName !== "undefined" && documentIsHTML) { return context.getElementsByClassName(className); } }; /* QSA/matchesSelector ---------------------------------------------------------------------- */ // QSA and matchesSelector support // matchesSelector(:active) reports false when true (IE9/Opera 11.5) rbuggyMatches = []; // qSa(:focus) reports false when true (Chrome 21) // We allow this because of a bug in IE8/9 that throws an error // whenever `document.activeElement` is accessed on an iframe // So, we allow :focus to pass through QSA all the time to avoid the IE error // See http://bugs.jquery.com/ticket/13378 rbuggyQSA = []; if ((support.qsa = rnative.test(document.querySelectorAll))) { // Build QSA regex // Regex strategy adopted from Diego Perini assert(function (div) { // Select is set to empty string on purpose // This is to test IE's treatment of not explicitly // setting a boolean content attribute, // since its presence should be enough // http://bugs.jquery.com/ticket/12359 docElem.appendChild(div).innerHTML = "<a id='" + expando + "'></a>" + "<select id='" + expando + "-\r\\' msallowcapture=''>" + "<option selected=''></option></select>"; // Support: IE8, Opera 11-12.16 // Nothing should be selected when empty strings follow ^= or $= or *= // The test attribute must be unknown in Opera but "safe" for WinRT // http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section if (div.querySelectorAll("[msallowcapture^='']").length) { rbuggyQSA.push("[*^$]=" + whitespace + "*(?:''|\"\")"); } // Support: IE8 // Boolean attributes and "value" are not treated correctly if (!div.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 (!div.querySelectorAll("[id~=" + expando + "-]").length) { rbuggyQSA.push("~="); } // 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 (!div.querySelectorAll(":checked").length) { rbuggyQSA.push(":checked"); } // Support: Safari 8+, iOS 8+ // https://bugs.webkit.org/show_bug.cgi?id=136851 // In-page `selector#id sibing-combinator selector` fails if (!div.querySelectorAll("a#" + expando + "+*").length) { rbuggyQSA.push(".#.+[+~]"); } }); assert(function (div) { // Support: Windows 8 Native Apps // The type and name attributes are restricted during .innerHTML assignment var input = document.createElement("input"); input.setAttribute("type", "hidden"); div.appendChild(input).setAttribute("name", "D"); // Support: IE8 // Enforce case-sensitivity of name attribute if (div.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 (!div.querySelectorAll(":enabled").length) { rbuggyQSA.push(":enabled", ":disabled"); } // Opera