Upgrade click, dblclick, and contextmenu events to be PointerEvent

[travisleithead]

See discussion: w3c/pointerevents#100 (comment)

[travisleithead]

This seems like a good idea, and seems to have some consensus and match (at least one) existing implementation.

[travisleithead]

The tests show that there is not sufficient interop yet to make the switch from MouseEvent (current described in the spec) to PointerEvent.

• Chrome: MouseEvent
• Firefox: MouseEvent
• Edge: PointerEvent

[travisleithead]

Tests are now commited to WPT (web-platform-tests/wpt#5012)

[cynthia]

I checked this again, the interop isn't quite there. @patrickhlauke could you comment if this is blocking anything on your side? (And whether or not this will happen at some point?)

[siusin]

Thanks all.

We're closing this issue on the W3C HTML specification because the W3C and WHATWG are now working together on HTML, and all issues are being discussed on the WHATWG repository.

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