Bring jQuery('#id') and jQuery('body') logic back into core (while leaving it in Sizzle at the same time). Was causing too much of a performance hit to leave it all to Sizzle.
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src/core.js
47
src/core.js
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@ -15,8 +15,9 @@ var jQuery = function( selector, context ) {
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// A central reference to the root jQuery(document)
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// A central reference to the root jQuery(document)
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rootjQuery,
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rootjQuery,
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// A simple way to check for HTML strings
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// A simple way to check for HTML strings or ID strings
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quickExpr = /^[^<]*(<[\w\W]+>)[^>]*$/,
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// (both of which we optimize for)
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quickExpr = /^(?:[^<]*(<[\w\W]+>)[^>]*$|#([\w\-]+)$)/,
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// Check if a string has a non-whitespace character in it
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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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rnotwhite = /\S/,
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@ -92,10 +93,25 @@ jQuery.fn = jQuery.prototype = {
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return this;
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return this;
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}
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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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// Handle HTML strings
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if ( typeof selector === "string" ) {
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if ( typeof selector === "string" ) {
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// Are we dealing with HTML string
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// Are we dealing with HTML string or an ID?
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if ( (match = quickExpr.exec( selector )) ) {
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match = quickExpr.exec( selector );
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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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// 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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context = context instanceof jQuery ? context[0] : context;
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doc = (context ? context.ownerDocument || context : document);
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doc = (context ? context.ownerDocument || context : document);
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@ -119,6 +135,29 @@ jQuery.fn = jQuery.prototype = {
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return jQuery.merge( this, selector );
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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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}
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// HANDLE: $(expr, $(...))
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// HANDLE: $(expr, $(...))
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} else if ( !context || context.jquery ) {
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} else if ( !context || context.jquery ) {
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return (context || rootjQuery).find( selector );
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return (context || rootjQuery).find( selector );
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