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define( [
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"../core",
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"../var/document",
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"../var/isFunction"
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], function( jQuery, document, isFunction ) {
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"use strict";
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var readyCallbacks = [],
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whenReady = function( fn ) {
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readyCallbacks.push( fn );
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},
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executeReady = function( fn ) {
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// Prevent errors from freezing future callback execution (gh-1823)
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// Not backwards-compatible as this does not execute sync
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window.setTimeout( function() {
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fn.call( document, jQuery );
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} );
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};
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jQuery.fn.ready = function( fn ) {
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whenReady( fn );
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return this;
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};
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jQuery.extend( {
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// Is the DOM ready to be used? Set to true once it occurs.
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isReady: false,
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// A counter to track how many items to wait for before
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// the ready event fires. See #6781
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readyWait: 1,
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ready: function( wait ) {
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// Abort if there are pending holds or we're already ready
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if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
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return;
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}
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// Remember that the DOM is ready
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jQuery.isReady = true;
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// If a normal DOM Ready event fired, decrement, and wait if need be
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if ( wait !== true && --jQuery.readyWait > 0 ) {
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return;
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}
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whenReady = function( fn ) {
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readyCallbacks.push( fn );
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while ( readyCallbacks.length ) {
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fn = readyCallbacks.shift();
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if ( isFunction( fn ) ) {
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executeReady( fn );
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}
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}
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};
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whenReady();
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}
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} );
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// Make jQuery.ready Promise consumable (gh-1778)
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jQuery.ready.then = jQuery.fn.ready;
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/**
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* The ready event handler and self cleanup method
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*/
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function completed() {
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document.removeEventListener( "DOMContentLoaded", completed );
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window.removeEventListener( "load", completed );
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jQuery.ready();
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}
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// Catch cases where $(document).ready() is called
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// after the browser event has already occurred.
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// Support: IE9-10 only
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// Older IE sometimes signals "interactive" too soon
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if ( document.readyState === "complete" ||
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( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
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// Handle it asynchronously to allow scripts the opportunity to delay ready
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window.setTimeout( jQuery.ready );
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} else {
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// Use the handy event callback
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document.addEventListener( "DOMContentLoaded", completed );
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// A fallback to window.onload, that will always work
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window.addEventListener( "load", completed );
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}
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} );
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