HTML: enterkeyhint attribute

[annevk]

In whatwg/html#3538 a new attribute is proposed for all elements. It allows the page to control the visual label of the virtual keyboard enter key to some extent (it's an enum) when a visual keyboard is shown for that element (e.g., when it's editable and focused).

[bzbarsky]

Note that we already support such a thing as "moz-actionhint".

In general, this seems ok to me, modulo naming...

[domenic]

If folks want to chip in on the name, now's the time. Current plan is inputactionlabel.

[bzbarsky]

I just asked some questions about how this is supposed to work in practice in https://bugzilla.mozilla.org/show_bug.cgi?id=1490661#c4

[sideshowbarker]

This was renamed to enterkeyhint (so maybe change the issue title here?) and is now in the HTML standard:

• whatwg/html@a5422d9
• https://html.spec.whatwg.org/multipage/interaction.html#attr-enterkeyhint

The enterkeyhint content attribute is an enumerated attribute that specifies what action label (or icon) to present for the enter key on virtual keyboards. This allows authors to customize the presentation of the enter key in order to make it more helpful for users.

• Intent to Ship for Chrome: https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/Hfe5xktjSV8/Re-SMF3wAwAJ
• Firefox feature bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1490661
• Safari feature bug: https://bugs.webkit.org/show_bug.cgi?id=189546