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MIT-licensed, client-side, JavaScript framework that makes building rich web applications easy.
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JavaScript
/*
---
name: DOMReady
description: Contains the custom event domready.
license: MIT-style license.
requires: [Browser, Element, Element.Event]
provides: [DOMReady, DomReady]
...
*/
(function(window, document){
var ready,
loaded,
checks = [],
shouldPoll,
timer,
testElement = document.createElement('div');
var domready = function(){
clearTimeout(timer);
if (!ready) {
Browser.loaded = ready = true;
document.removeListener('DOMContentLoaded', domready).removeListener('readystatechange', check);
document.fireEvent('domready');
window.fireEvent('domready');
}
// cleanup scope vars
document = window = testElement = null;
};
var check = function(){
for (var i = checks.length; i--;) if (checks[i]()){
domready();
return true;
}
return false;
};
var poll = function(){
clearTimeout(timer);
if (!check()) timer = setTimeout(poll, 10);
};
document.addListener('DOMContentLoaded', domready);
/*<ltIE8>*/
// doScroll technique by Diego Perini http://javascript.nwbox.com/IEContentLoaded/
// testElement.doScroll() throws when the DOM is not ready, only in the top window
var doScrollWorks = function(){
try {
testElement.doScroll();
return true;
} catch (e){}
return false;
};
// If doScroll works already, it can't be used to determine domready
// e.g. in an iframe
if (testElement.doScroll && !doScrollWorks()){
checks.push(doScrollWorks);
shouldPoll = true;
}
/*</ltIE8>*/
if (document.readyState) checks.push(function(){
var state = document.readyState;
return (state == 'loaded' || state == 'complete');
});
if ('onreadystatechange' in document) document.addListener('readystatechange', check);
else shouldPoll = true;
if (shouldPoll) poll();
Element.Events.domready = {
onAdd: function(fn){
if (ready) fn.call(this);
}
};
// Make sure that domready fires before load
Element.Events.load = {
base: 'load',
onAdd: function(fn){
if (loaded && this == window) fn.call(this);
},
condition: function(){
if (this == window){
domready();
delete Element.Events.load;
}
return true;
}
};
// This is based on the custom load event
window.addEvent('load', function(){
loaded = true;
});
})(window, document);