tree 16192f2f918977be97d5ad71ba3f3fec11d60254
parent 3f2751bcb70e9feb44e054858d891bedd7e4aece
author Ionel Popescu <iopopesc@microsoft.com> 1631558651 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1631560280 -0700

[SelectMenu] Allow the UA provided shadow DOM to be replaced via attachShadow.

This CL enables authors to replace the UA provided shadow DOM
for <selectmenu> by calling attachShadow().

For now this change follows the behavior of declarative shadow DOM
where the initial shadow DOM is emptied out and attachShadow returns
a reference to it. There is an open-ui issue[1] to further discuss this
behavior.

The initial properties of the UA shadow root are updated with
the ones provided by attachShadow.

[1]: https://github.com/openui/open-ui/issues/399

Bug: 1121840
Change-Id: I91758022b211fd4c511c0f86997de347c03e6b83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3151015
Reviewed-by: Dan Clark <daniec@microsoft.com>
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: Ionel Popescu <iopopesc@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#920836}