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