WebKit Native Asynchronous Script Loading
WebKit nightlies are now supporting this. The syntax looks like this:
<script async src="myAsyncScript.js" onload="myInit()"></script>
<script defer src="myDeferScript.js" onload="myInit()"></script>
…Both
async
anddefer
scripts begin to download immediately without pausing the parser and both support an optional onload handler to