[w3c/uievents] Require support or non-support for legacy init*Event (#112)

See https://github.com/w3c/web-platform-tests/pull/4117

I would like the spec to say which methods must be supported, and which must not be supported. Saying that they are optional doesn't help with reaching interop.

It seems Gecko does not support `initKeyboardEvent`, but WebKit/Chromium/Edge 13 do.

http://software.hixie.ch/utilities/js/live-dom-viewer/saved/4630

Should Gecko add it, or should the other browsers drop it?

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Received on Tuesday, 1 November 2016 10:48:08 UTC