In case anyone is interested...

I've started on a collection of custom components implementing various Web APIs.

The components are freely available (MIT license) here: There's a link to a demo site in the sidebar.

Right now I'm just picking more or less randomly from the list here:, but if anyone is interested in anything particular, let me know. Right now it has Contact Picker, EyeDropper and Vibration API implementations.

PS: Many of these APIs have limited browser support, and Safari in particular is lacking, so maybe don't try these on your iPhone.