Move jQuery(...) selector speed-up logic into Sizzle(...) qSA handling. Additionally add in a new catch for Sizzle('.class') (avoid using qSA and use getElementsByClassName instead, where applicable).
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1 changed files with 16 additions and 62 deletions
78
src/core.js
78
src/core.js
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@ -15,9 +15,8 @@ var jQuery = function( selector, context ) {
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// A central reference to the root jQuery(document)
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rootjQuery,
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// A simple way to check for HTML strings or ID strings
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// (both of which we optimize for)
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quickExpr = /^(?:[^<]*(<[\w\W]+>)[^>]*$|#([\w\-]+)$)/,
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// A simple way to check for HTML strings
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quickExpr = /^(?:[^<]*(<[\w\W]+>)[^>]*$/,
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// Check if a string has a non-whitespace character in it
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rnotwhite = /\S/,
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@ -93,76 +92,31 @@ jQuery.fn = jQuery.prototype = {
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return this;
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}
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// The body element only exists once, optimize finding it
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if ( selector === "body" && !context && document.body ) {
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this.context = document;
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this[0] = document.body;
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this.selector = "body";
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this.length = 1;
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return this;
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}
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// Handle HTML strings
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if ( typeof selector === "string" ) {
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// Are we dealing with HTML string or an ID?
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match = quickExpr.exec( selector );
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// Are we dealing with HTML string
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if ( (match = quickExpr.exec( selector )) ) {
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context = context instanceof jQuery ? context[0] : context;
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doc = (context ? context.ownerDocument || context : document);
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// Verify a match, and that no context was specified for #id
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if ( match && (match[1] || !context) ) {
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// If a single string is passed in and it's a single tag
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// just do a createElement and skip the rest
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ret = rsingleTag.exec( selector );
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// HANDLE: $(html) -> $(array)
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if ( match[1] ) {
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context = context instanceof jQuery ? context[0] : context;
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doc = (context ? context.ownerDocument || context : document);
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// If a single string is passed in and it's a single tag
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// just do a createElement and skip the rest
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ret = rsingleTag.exec( selector );
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if ( ret ) {
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if ( jQuery.isPlainObject( context ) ) {
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selector = [ document.createElement( ret[1] ) ];
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jQuery.fn.attr.call( selector, context, true );
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} else {
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selector = [ doc.createElement( ret[1] ) ];
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}
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if ( ret ) {
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if ( jQuery.isPlainObject( context ) ) {
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selector = [ document.createElement( ret[1] ) ];
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jQuery.fn.attr.call( selector, context, true );
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} else {
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ret = jQuery.buildFragment( [ match[1] ], [ doc ] );
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selector = (ret.cacheable ? jQuery(ret.fragment).clone()[0] : ret.fragment).childNodes;
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selector = [ doc.createElement( ret[1] ) ];
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}
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return jQuery.merge( this, selector );
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// HANDLE: $("#id")
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} else {
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elem = document.getElementById( match[2] );
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// Check parentNode to catch when Blackberry 4.6 returns
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// nodes that are no longer in the document #6963
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if ( elem && elem.parentNode ) {
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// Handle the case where IE and Opera return items
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// by name instead of ID
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if ( elem.id !== match[2] ) {
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return rootjQuery.find( selector );
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}
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// Otherwise, we inject the element directly into the jQuery object
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this.length = 1;
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this[0] = elem;
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}
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this.context = document;
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this.selector = selector;
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return this;
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ret = jQuery.buildFragment( [ match[1] ], [ doc ] );
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selector = (ret.cacheable ? jQuery(ret.fragment).clone()[0] : ret.fragment).childNodes;
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}
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// HANDLE: $("TAG")
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} else if ( !context && !rnonword.test( selector ) ) {
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this.selector = selector;
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this.context = document;
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selector = document.getElementsByTagName( selector );
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return jQuery.merge( this, selector );
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// HANDLE: $(expr, $(...))
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