ready.js (2101B)
1 define( [ 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 11 var readyList = jQuery.Deferred(); 12 13 jQuery.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 28 jQuery.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 58 jQuery.ready.then = readyList.then; 59 60 // The ready event handler and self cleanup method 61 function 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 71 if ( 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 } );