Dialog light dismiss

[lukewarlow]

Request for Mozilla Position on an Emerging Web Specification

• Specification title: HTML
• Specification or proposal URL (if available): Add light dismiss functionality to <dialog> whatwg/html#9373
• Explainer URL (if available): Add light dismiss functionality to <dialog> whatwg/html#9373
• Proposal author(s) (@-mention GitHub accounts):
• Caniuse.com URL (optional):
• Bugzilla URL (optional):
• Mozillians who can provide input (optional): @smaug----
• WebKit Standards Position: Dialog closedby attribute and requestClose() function WebKit/standards-positions#329

Other information

This is a request for a Mozilla standards position on the idea of adding (optional) light dismiss functionality to Dialogs.
See whatwg/html#9373 for the discussion. The current proposal is a new attribute closedby (naming TBD) with three values, allowing no close bahaviour, close watcher behaviour, or close watcher and light dismiss behaviour.

[lukewarlow]

Draft PR to give a rough idea of what this could look like whatwg/html#10157

[smaug----]

As I mentioned during the WHATNOT meeting, it would be good to consider also whether the proposed attributes might be useful elsewhere too, like with popovers. And if so, does that end up affecting the proposal somehow.

[lukewarlow]

To update this the latest PR is at whatwg/html#10737

[miketaylr]

Note there is an Intent to Ship on blink-dev https://groups.google.com/a/chromium.org/g/blink-dev/c/_pIOAyg1_E0/m/DnkvfQLVDgAJ for this feature - whatwg/html#10737 is landed as https://html.spec.whatwg.org/#attr-dialog-closedby.

Now would be a good time to provide feedback (or a position one way or another), if any. cc @smaug----