[IgorPartola]

I think the main issue here is not IE6 but all the modern browsers (FF 3.5, Safari 4, IE8) that do not support this feature. Targeting Chrome users only is not that appealing.

[freetard]

The feature was added to webkit so both safari, chrome and other will get the feature and so is firefox https://bugzilla.mozilla.org/show_bug.cgi?id=472529

[JulianMorrison]

This is HTML5, they will support it soon if not yet.

[bumblebird]

That's why you would use it where available, instead of targeting.

if (browser.supportsWebSocket) useWebSocket(); else useComet();