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2.1 kBJavaScriptView Raw
1define( [
2 "../core",
3 "../var/document",
4 "../core/readyException",
5 "../deferred"
6], function( jQuery, document ) {
7
8"use strict";
9
10// The deferred used on DOM ready
11var readyList = jQuery.Deferred();
12
13jQuery.fn.ready = function( fn ) {
14
15 readyList
16 .then( fn )
17
18 // Wrap jQuery.readyException in a function so that the lookup
19 // happens at the time of error handling instead of callback
20 // registration.
21 .catch( function( error ) {
22 jQuery.readyException( error );
23 } );
24
25 return this;
26};
27
28jQuery.extend( {
29
30 // Is the DOM ready to be used? Set to true once it occurs.
31 isReady: false,
32
33 // A counter to track how many items to wait for before
34 // the ready event fires. See trac-6781
35 readyWait: 1,
36
37 // Handle when the DOM is ready
38 ready: function( wait ) {
39
40 // Abort if there are pending holds or we're already ready
41 if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
42 return;
43 }
44
45 // Remember that the DOM is ready
46 jQuery.isReady = true;
47
48 // If a normal DOM Ready event fired, decrement, and wait if need be
49 if ( wait !== true && --jQuery.readyWait > 0 ) {
50 return;
51 }
52
53 // If there are functions bound, to execute
54 readyList.resolveWith( document, [ jQuery ] );
55 }
56} );
57
58jQuery.ready.then = readyList.then;
59
60// The ready event handler and self cleanup method
61function completed() {
62 document.removeEventListener( "DOMContentLoaded", completed );
63 window.removeEventListener( "load", completed );
64 jQuery.ready();
65}
66
67// Catch cases where $(document).ready() is called
68// after the browser event has already occurred.
69// Support: IE <=9 - 10 only
70// Older IE sometimes signals "interactive" too soon
71if ( document.readyState === "complete" ||
72 ( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
73
74 // Handle it asynchronously to allow scripts the opportunity to delay ready
75 window.setTimeout( jQuery.ready );
76
77} else {
78
79 // Use the handy event callback
80 document.addEventListener( "DOMContentLoaded", completed );
81
82 // A fallback to window.onload, that will always work
83 window.addEventListener( "load", completed );
84}
85
86} );