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Comment by ck2 | Hacker News Reader

Yes, we talked about this yesterday.

http://news.ycombinator.com/item?id=2780233

And this does the same thing without using proprietary code:

     <script defer async src="blah"></script>

(and head.js won't do anything special in browsers where the above line isn't supported anyway)

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It's MIT licensed, so not proprietary. Did you mean to say "third-party"?

AFAIK, `defer` only works in IE, and `async` only works in: IE10p2+, Chrome 11+, Safari 5+, Firefox 3.6+

So some browsers would be left out, right?

That list represents most of the browsers people care about, with the exception of old IE. And "better with a modern browser, manages to function on old IE" seems like the right standard to shoot for most of the time, depending on your site's audience.

The pattern Async Analytics uses works in all browsers and it's simple enough that you don't need a library for it:

    var script = document.createElement('script'); 
    script.async = true; // enables out of order execution
    script.src = '…'
    var s = document.getElementsByTagName('script')[0]; 
    s.parentNode.insertBefore(script, s);

http://code.google.com/apis/analytics/docs/tracking/asyncTra...

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