I know that IE doesn't have a load
event for <script>
elements — is there any way to make up for that reliably?
I've seen some talk of things (e.g., requestState == "complete"
) but nothing very verifiable.
This is to be used so that code can be called after a script is finished loading, so that I don't have to use AJAX to load new sources (thus eliminating issues with cross-domain AJAX).
You can use a script loader like head.js. It has its own load callback and it will decrease load time too.
From the headjs
code: (slightly modified to be more portable)
function scriptTag(src, callback) {
var s = document.createElement('script');
s.type = 'text/' + (src.type || 'javascript');
s.src = src.src || src;
s.async = false;
s.onreadystatechange = s.onload = function () {
var state = s.readyState;
if (!callback.done && (!state || /loaded|complete/.test(state))) {
callback.done = true;
callback();
}
};
// use body if available. more safe in IE
(document.body || head).appendChild(s);
}
I want to add that if you don't support IE7 and below, you don't need onreadystatechange
stuff. Source: quircksmode.org
Simplified and working code from original answer:
function loadScript(src, callback) {
var s = document.createElement('script');
s.type = 'text/javascript';
s.src = src;
s.async = false;
if(callback) {
s.onload = callback;
}
document.body.appendChild(s);
}
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