LazyWrite (deferred document.write implementation)

LazyWrite is build to have the best compromise between a good page load and write a complex external data in your page (like Advertising). This allow you to control when should those data start to render or load.
Size: less than 3.4KB (2KB gzipped) using UglifyJS.

Advantages

Increase highly the page load
Stop freezing client navigator
Forget iframe calls
No other library required (like jQuery)
No(or less) change of existing code

Browser Support:

IE [tested on v6+]
FireFox [tested on v2+]
Chrome [tested on v5+]
Safari [tested on v4+]
Opera [tested on v9.6+]

API: ("LazyWrite" global variable)

`.write()`

original document.write function.

`.prepare()`

Replaces original document.write() with lazy write.
This function will auto executes when "lazywrite.js" loaded.
To prevent auto executing, sets AUTO_LAZYWRITE = false; before loads "lazywrite.js".

`.render(content String [, holderId String] [, callback(errors Array) Function])`

postpones content rendering in the given holder element or current place (like document.write()).
An array of all caught exceptions will passes to the callback().

`.process()`

Starts to render all contents.
When all content be rendered, it will restores the original document.write().

`.findScripts([String type])`

Finds and stacks all custom typed script elements.

As AMD Module

No global variable LazyWrite.
no .prepare() auto executing.

Limitation:

Can't use document.getElement*() functions to get the writing element in the processing.

Example: Google AdSense

<script src="lazywrite-min.js"></script>
<script>
    google_ad_client = "ca-pub-5840687392233497";
    google_ad_slot = "9902234827";
    google_ad_width = 728;
    google_ad_height = 90;
    document.write('<script src="//pagead2.googlesyndication.com/pagead/show_ads.js"><\/script>');
    setTimeout(LazyWrite.process, 3000); // delay 3sec
</script>

nathanpeles/LazyWrite