Set dialog is modal to false when removed from the document.

[lukewarlow]

Fixes #10452

This is just updating the spec to match reality.

• At least two implementers are interested (and none opposed):
  • …
  • …
• Tests are written and can be reviewed and commented upon at:
  • https://wpt.live/css/selectors/modal-pseudo-class.html - the final two assertions in the first sub-test in this file tests this behaviour.
• Implementation bugs are filed:
  • Chromium: …
  • Gecko: …
  • WebKit: …
  • Deno (only for timers, structured clone, base64 utils, channel messaging, module resolution, web workers, and web storage): …
  • Node.js (only for timers, structured clone, base64 utils, channel messaging, and module resolution): …
• MDN issue is filed: …
• The top of this comment includes a clear commit message to use.

(See WHATWG Working Mode: Changes for more details.)

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/interactive-elements.html ( diff )

[lukewarlow]

It seems this was actually already done in 9fcb6c3 so please forgive me if I've missed something glaringly obvious. I think this has regressed at some point though and it no longer is specced to happen?

[keithamus]

Looks like #9093 (specifically 8430871#diff-41cf6794ba4200b839c53531555f0f3998df4cbb01a4d5cb0b94e3ca5e23947dL60407) may have accidentally refactored out this logic.