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