Skip light dismiss when opening select's picker

[josepharhar]

This PR prevents light dismiss from running immediately after clicking the select element's invoker button, which would close the base appearance picker as soon as the user releases the mouse since the picker is opened on mousedown.

• At least two implementers are interested (and none opposed):
  • Chromium
  • …
• Tests are written and can be reviewed and commented upon at:
  • Already tested by various tests in the-select-element/customizable-select
• Implementation bugs are filed:
  • Chromium: https://chromium-review.googlesource.com/c/chromium/src/+/6912976
  • Gecko: …
  • WebKit: …
• Corresponding HTML AAM & ARIA in HTML issues & PRs: Not needed
• MDN issue is filed: Not needed
• The top of this comment includes a clear commit message to use.

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

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/popover.html ( diff )

[sb3nder]

I wonder if instead of this, would it be possible to do something like the following?

in nearest inclusive target popover:

If currentNode is a select that is being rendered as a drop-down box with base appearance, and select popover visibility state is showing, then return select popover.

[josepharhar]

I wonder if instead of this, would it be possible to do something like the following?

in nearest inclusive target popover:

If currentNode is a select that is being rendered as a drop-down box with base appearance, and select popover visibility state is showing, then return select popover.

Thanks, that's much better! I put it in the popover target element algorithm instead and I'm implementing it in chromium here, which seems to work well. How does it look?

[sb3nder]

looks good 👍