jQuery.fn = jQuery.prototype = {
init: function( selector, context ) {
// Make sure that a selection was provided
- selector = selector || document;
+ if ( selector === undefined ) {
+ selector = document;
+ }
+
+ // Handle "", null
+ if ( !selector ) {
+ this.length = 0;
+ this.context = document;
+ return this;
+ }
// Handle $(DOMElement)
if ( selector.nodeType ) {
this.context = selector;
return this;
}
+
// Handle HTML strings
if ( typeof selector === "string" ) {
// Are we dealing with HTML string or an ID?
if ( match && (match[1] || !context) ) {
// HANDLE: $(html) -> $(array)
- if ( match[1] )
+ if ( match[1] ) {
selector = jQuery.clean( [ match[1] ], context );
// HANDLE: $("#id")
- else {
+ } else {
var elem = document.getElementById( match[3] );
// Handle the case where IE and Opera return items
// by name instead of ID
- if ( elem && elem.id != match[3] )
+ if ( elem && elem.id != match[3] ) {
return jQuery().find( selector );
+ }
// Otherwise, we inject the element directly into the jQuery object
var ret = jQuery( elem || [] );
// HANDLE: $(expr, [context])
// (which is just equivalent to: $(content).find(expr)
- } else
- return jQuery( context ).find( selector );
+ } else if ( !context || context.nodeType ) {
+ this[0] = context || document;
+ this.length = 1;
+ this.context = context;
+ return this.find( selector );
+
+ } else {
+ return (context.jquery ? context : jQuery( context )).find( selector );
+ }
// HANDLE: $(function)
// Shortcut for document ready
- } else if ( jQuery.isFunction( selector ) )
+ } else if ( jQuery.isFunction( selector ) ) {
return jQuery( document ).ready( selector );
+ }
// Make sure that old selector state is passed along
if ( selector.selector && selector.context ) {
find: function( selector ) {
if ( this.length === 1 ) {
- var ret = this.pushStack( [], "find", selector );
- ret.length = 0;
+ var ret = this.pushStack( "", "find", selector );
jQuery.find( selector, this[0], ret );
return ret;
} else {
remove: function( selector ) {
if ( !selector || jQuery.multiFilter( selector, [ this ] ).length ) {
- // Prevent memory leaks
- jQuery( "*", this ).add([this]).each(function(){
- jQuery.event.remove(this);
- jQuery.removeData(this);
- });
- if (this.parentNode)
+ if ( this.nodeType === 1 ) {
+ cleanData( this.getElementsByTagName("*") );
+ cleanData( [this] );
+ }
+
+ if ( this.parentNode ) {
this.parentNode.removeChild( this );
+ }
}
},
empty: function() {
// Remove element nodes and prevent memory leaks
- jQuery(this).children().remove();
+ if ( this.nodeType === 1 ) {
+ cleanData( this.getElementsByTagName("*") );
+ }
// Remove any remaining nodes
- while ( this.firstChild )
+ while ( this.firstChild ) {
this.removeChild( this.firstChild );
+ }
}
}, function(name, fn){
jQuery.fn[ name ] = function(){
};
});
+function cleanData( elems ) {
+ for ( var i = 0, l = elems.length; i < l; i++ ) {
+ var id = elems[i][expando];
+ if ( id ) {
+ delete jQuery.cache[ id ];
+ }
+ }
+}
+
// Helper function used by the dimensions and offset modules
function num(elem, prop) {
return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;