Add viewport meta 'interactive-widgets'

[bokand]

This adds a description of the proposed interactive-widgets key of the viewport <meta> tag.

This property controls how virtual-keyboards (and potential similar UI widgets) affect and resize viewports on a page.

• At least two implementers are interested (and none opposed):

  • Blink (me) - Intent To Ship
  • Gecko - ? - Standards Position
  • WebKit - ? - Standards Position

• Tests are written and can be reviewed and commented upon at:

  • Unfortunately WPTs do not support mobile browsers or virtual-keyboards as far as I know.

• Implementation bugs are filed:

  • Chrome: 1353728
  • Firefox: N/A
  • Safari: N/A

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Preview | Diff

[bokand]

@miketaylr, @emilio PTAL

[emilio]

@bokand why is this in the compat spec? https://w3c.github.io/csswg-drafts/css-viewport/ seems like a better fit for this?

[bokand]

@bokand why is this in the compat spec?

I think there was a preference to put it in Compat since the viewport meta spec text doesn't really exist yet in CSS-Viewport so I got advice to put it in Compat for the time being instead.

I did ask about just putting it into CSS-Viewport - if you're good with it I'm happy to move this PR to there. (though according to Rune the existing spec text for meta viewport parsing needs to be rewritten anyway).

[emilio]

I think given this is mostly new spec text, it's probably better in the css-viewport spec.

[bokand]

sgtm, I'll put up a PR there instead.

[miketaylr]

I think given this is mostly new spec text, it's probably better in the css-viewport spec.

That sounds good - if there's any pushback or delays, I have no objections to landing it temporarily here in compat (seems better somewhere than nowhere).

[bokand]

For completeness: PR to CSS-Viewport