Is iPhone/iPad Safari fully HTML5 compliant?

This web app http开发者_如何学运维://www.wunderlist.com/ works in HTML5 browsers like Google Chrome or Firefox.

But on iPad the button click doesn't trigger so Is iPhone/iPad Safari fully HTML5 compliant?

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HTML5 itself isn't yet complete, so there is no notion of a fully HTML5-compliant browser.

By the way, you realize there's a native universal iOS app for Wunderlist so you don't have to use the web app on iOS devices, right?

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It supports a lot of the HTML5 features, but no browser is completely compliant, because, as BoltClock mentioned, HTML5 hasn't been finalized.

I believe the reason the creators haven't looked into that bug is because there is a great native app for the iPad.

According to Stephen's link, iOS 4.3 has only about 65% of the features that they check for. For example, you can't use position:fixed in Safari for iOS.