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Create jQuery.holdReady(true/false) method to encapsulate jQuery.readyWait++ / jQuery.ready(true) logic. Fix problem where jQuery.ready may trigger twice, causing the (unsupported) document.onready to run twice. Fixes #8803 .

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This commit is contained in:
Dave Methvin 2011-02-02 21:57:44 -05:00
parent bbd9c776ea
commit 14193e449e
3 changed files with 24 additions and 18 deletions
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18
src/core.js
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@ -374,15 +374,19 @@ jQuery.extend({
// the ready event fires. See #6781
readyWait: 1,
// Hold (or release) the ready event
holdReady: function( hold ) {
if ( hold ) {
jQuery.readyWait++;
} else {
jQuery.ready( true );
}
},
// Handle when the DOM is ready
ready: function( wait ) {
// A third-party is pushing the ready event forwards
if ( wait === true ) {
jQuery.readyWait--;
}
// Make sure that the DOM is not already loaded
if ( !jQuery.readyWait || (wait !== true && !jQuery.isReady) ) {
// Either a released hold or an DOMready/load event and not yet ready
if ( (wait === true && !--jQuery.readyWait) || (wait !== true && !jQuery.isReady) ) {
// Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
if ( !document.body ) {
return setTimeout( jQuery.ready, 1 );

6
test/data/readywaitloader.js
View file

@ -1,14 +1,14 @@
// Simple script loader that uses jQuery.readyWait
// Simple script loader that uses jQuery.readyWait via jQuery.holdReady()
//Hold on jQuery!
jQuery.readyWait++;
jQuery.holdReady(true);
var readyRegExp = /^(complete|loaded)$/;
function assetLoaded( evt ){
var node = evt.currentTarget || evt.srcElement;
if ( evt.type === "load" || readyRegExp.test(node.readyState) ) {
jQuery.ready(true);
jQuery.holdReady(false);
}
}

18
test/readywait.html
View file

@ -1,13 +1,13 @@
<!DOCTYPE html>
<html>
<!--
Test for jQuery.readyWait. Needs to be a
Test for jQuery.holdReady. Needs to be a
standalone test since it deals with DOM
ready.
-->
<head>
<title>
jQuery.readyWait Test
jQuery.holdReady Test
</title>
<style>
div { margin-top: 10px; }
@ -52,15 +52,17 @@
</head>
<body>
<h1>
jQuery.readyWait Test
jQuery.holdReady Test
</h1>
<p>
This is a test page for jQuery.readyWait, that was
added due to this ticket
<a href="http://bugs.jquery.com/ticket/6781">#6781</a>.
This is a test page for jQuery.readyWait and jQuery.holdReady,
see
<a href="http://bugs.jquery.com/ticket/6781">#6781</a>
and
<a href="http://bugs.jquery.com/ticket/8803">#8803</a>.
</p>
<p>
Test for jQuery.readyWait, which can be used
Test for jQuery.holdReady, which can be used
by plugins and other scripts to indicate something
important to the page is still loading and needs
to block the DOM ready callbacks that are registered
@ -68,7 +70,7 @@
</p>
<p>
Script loaders are the most likely kind of script
to use jQuery.readyWait, but it could be used by
to use jQuery.holdReady, but it could be used by
other things like a script that loads a CSS file
and wants to pause the DOM ready callbacks.
</p>