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1 define( [
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2 "../core",
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3 "../var/document",
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4 "../var/isFunction"
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5 ], function( jQuery, document, isFunction ) {
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6
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7 "use strict";
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8
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9 var readyCallbacks = [],
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10 whenReady = function( fn ) {
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11 readyCallbacks.push( fn );
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12 },
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13 executeReady = function( fn ) {
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14
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15 // Prevent errors from freezing future callback execution (gh-1823)
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16 // Not backwards-compatible as this does not execute sync
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17 window.setTimeout( function() {
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18 fn.call( document, jQuery );
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19 } );
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20 };
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21
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22 jQuery.fn.ready = function( fn ) {
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23 whenReady( fn );
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24 return this;
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25 };
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26
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27 jQuery.extend( {
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28
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29 // Is the DOM ready to be used? Set to true once it occurs.
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30 isReady: false,
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31
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32 // A counter to track how many items to wait for before
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33 // the ready event fires. See #6781
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34 readyWait: 1,
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35
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36 ready: function( wait ) {
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37
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38 // Abort if there are pending holds or we're already ready
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39 if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
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40 return;
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41 }
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42
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43 // Remember that the DOM is ready
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44 jQuery.isReady = true;
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45
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46 // If a normal DOM Ready event fired, decrement, and wait if need be
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47 if ( wait !== true && --jQuery.readyWait > 0 ) {
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48 return;
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49 }
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50
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51 whenReady = function( fn ) {
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52 readyCallbacks.push( fn );
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53
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54 while ( readyCallbacks.length ) {
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55 fn = readyCallbacks.shift();
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56 if ( isFunction( fn ) ) {
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57 executeReady( fn );
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58 }
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59 }
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60 };
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61
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62 whenReady();
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63 }
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64 } );
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65
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66 // Make jQuery.ready Promise consumable (gh-1778)
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67 jQuery.ready.then = jQuery.fn.ready;
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68
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69 /**
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70 * The ready event handler and self cleanup method
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71 */
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72 function completed() {
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73 document.removeEventListener( "DOMContentLoaded", completed );
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74 window.removeEventListener( "load", completed );
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75 jQuery.ready();
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76 }
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77
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78 // Catch cases where $(document).ready() is called
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79 // after the browser event has already occurred.
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80 // Support: IE9-10 only
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81 // Older IE sometimes signals "interactive" too soon
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82 if ( document.readyState === "complete" ||
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83 ( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
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84
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85 // Handle it asynchronously to allow scripts the opportunity to delay ready
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86 window.setTimeout( jQuery.ready );
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87
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88 } else {
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89
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90 // Use the handy event callback
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91 document.addEventListener( "DOMContentLoaded", completed );
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92
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93 // A fallback to window.onload, that will always work
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94 window.addEventListener( "load", completed );
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95 }
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96
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97 } );
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