// Initialize a jQuery object define( [

"../core",
"../var/document",
"./var/rsingleTag",

"../traversing/findFilter"

], function( jQuery, document, rsingleTag ) {

“use strict”;

// A central reference to the root jQuery(document) var rootjQuery,

// A simple way to check for HTML strings
// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
// Strict HTML recognition (#11290: must start with <)
// Shortcut simple #id case for speed
rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,

init = jQuery.fn.init = function( selector, context, root ) {
        var match, elem;

        // HANDLE: $(""), $(null), $(undefined), $(false)
        if ( !selector ) {
                return this;
        }

        // Method init() accepts an alternate rootjQuery
        // so migrate can support jQuery.sub (gh-2101)
        root = root || rootjQuery;

        // Handle HTML strings
        if ( typeof selector === "string" ) {
                if ( selector[ 0 ] === "<" &&
                        selector[ selector.length - 1 ] === ">" &&
                        selector.length >= 3 ) {

                        // Assume that strings that start and end with <> are HTML and skip the regex check
                        match = [ null, selector, null ];

                } else {
                        match = rquickExpr.exec( selector );
                }

                // Match html or make sure no context is specified for #id
                if ( match && ( match[ 1 ] || !context ) ) {

                        // HANDLE: $(html) -> $(array)
                        if ( match[ 1 ] ) {
                                context = context instanceof jQuery ? context[ 0 ] : context;

                                // Option to run scripts is true for back-compat
                                // Intentionally let the error be thrown if parseHTML is not present
                                jQuery.merge( this, jQuery.parseHTML(
                                        match[ 1 ],
                                        context && context.nodeType ? context.ownerDocument || context : document,
                                        true
                                ) );

                                // HANDLE: $(html, props)
                                if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
                                        for ( match in context ) {

                                                // Properties of context are called as methods if possible
                                                if ( jQuery.isFunction( this[ match ] ) ) {
                                                        this[ match ]( context[ match ] );

                                                // ...and otherwise set as attributes
                                                } else {
                                                        this.attr( match, context[ match ] );
                                                }
                                        }
                                }

                                return this;

                        // HANDLE: $(#id)
                        } else {
                                elem = document.getElementById( match[ 2 ] );

                                if ( elem ) {

                                        // Inject the element directly into the jQuery object
                                        this[ 0 ] = elem;
                                        this.length = 1;
                                }
                                return this;
                        }

                // HANDLE: $(expr, $(...))
                } else if ( !context || context.jquery ) {
                        return ( context || root ).find( selector );

                // HANDLE: $(expr, context)
                // (which is just equivalent to: $(context).find(expr)
                } else {
                        return this.constructor( context ).find( selector );
                }

        // HANDLE: $(DOMElement)
        } else if ( selector.nodeType ) {
                this[ 0 ] = selector;
                this.length = 1;
                return this;

        // HANDLE: $(function)
        // Shortcut for document ready
        } else if ( jQuery.isFunction( selector ) ) {
                return root.ready !== undefined ?
                        root.ready( selector ) :

                        // Execute immediately if ready is not present
                        selector( jQuery );
        }

        return jQuery.makeArray( selector, this );
};

// Give the init function the jQuery prototype for later instantiation init.prototype = jQuery.fn;

// Initialize central reference rootjQuery = jQuery( document );

return init;

} );