128 lines
3.2 KiB
JavaScript
128 lines
3.2 KiB
JavaScript
// Initialize a jQuery object
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define( [
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"../core",
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"../var/document",
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"./var/rsingleTag",
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"../traversing/findFilter"
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], function( jQuery, document, rsingleTag ) {
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"use strict";
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// A central reference to the root jQuery(document)
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var rootjQuery,
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// A simple way to check for HTML strings
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// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
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// Strict HTML recognition (#11290: must start with <)
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// Shortcut simple #id case for speed
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rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,
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init = jQuery.fn.init = function( selector, context, root ) {
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var match, elem;
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// HANDLE: $(""), $(null), $(undefined), $(false)
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if ( !selector ) {
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return this;
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}
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// Method init() accepts an alternate rootjQuery
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// so migrate can support jQuery.sub (gh-2101)
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root = root || rootjQuery;
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// Handle HTML strings
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if ( typeof selector === "string" ) {
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if ( selector[ 0 ] === "<" &&
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selector[ selector.length - 1 ] === ">" &&
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selector.length >= 3 ) {
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// Assume that strings that start and end with <> are HTML and skip the regex check
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match = [ null, selector, null ];
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} else {
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match = rquickExpr.exec( selector );
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}
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// Match html or make sure no context is 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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// Option to run scripts is true for back-compat
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// Intentionally let the error be thrown if parseHTML is not present
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jQuery.merge( this, jQuery.parseHTML(
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match[ 1 ],
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context && context.nodeType ? context.ownerDocument || context : document,
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true
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) );
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// HANDLE: $(html, props)
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if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
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for ( match in context ) {
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// Properties of context are called as methods if possible
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if ( jQuery.isFunction( this[ match ] ) ) {
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this[ match ]( context[ match ] );
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// ...and otherwise set as attributes
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} else {
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this.attr( match, context[ match ] );
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}
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}
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}
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return this;
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// HANDLE: $(#id)
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} else {
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elem = document.getElementById( match[ 2 ] );
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if ( elem ) {
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// Inject the element directly into the jQuery object
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this[ 0 ] = elem;
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this.length = 1;
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}
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return this;
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}
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// HANDLE: $(expr, $(...))
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} else if ( !context || context.jquery ) {
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return ( context || root ).find( selector );
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// HANDLE: $(expr, context)
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// (which is just equivalent to: $(context).find(expr)
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} else {
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return this.constructor( context ).find( selector );
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}
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// HANDLE: $(DOMElement)
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} else if ( selector.nodeType ) {
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this[ 0 ] = selector;
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this.length = 1;
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return this;
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// HANDLE: $(function)
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// Shortcut for document ready
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} else if ( jQuery.isFunction( selector ) ) {
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return root.ready !== undefined ?
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root.ready( selector ) :
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// Execute immediately if ready is not present
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selector( jQuery );
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}
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return jQuery.makeArray( selector, this );
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};
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// Give the init function the jQuery prototype for later instantiation
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init.prototype = jQuery.fn;
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// Initialize central reference
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rootjQuery = jQuery( document );
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return init;
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} );
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