1974276 - Implement parsing & constructing of selectedcontent element

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, enhancement)

Comment 1

[r_a_m_i]

Has docs - https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/selectedcontent

Comment 2

[Sebastian Zartner [:sebo]]

Right, but the related browser compatibility data still needs to be updated once <selectedcontent> is implemented. So the dev-doc-needed flag should be kept for that.

Sebastian

Comment 3

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 1 - Customizable Select: Add pref. r=keithamus!

Comment 4

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 2 - Customizable Select: Implement stub for the `selectedcontent` element. r=#dom-core!,keithamus

Comment 5

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 3 - Customizable Select: Implement `#clear-a-selectedcontent`. r=#dom-core!,keithamus

Comment 6

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 4 - Customizable Select: Implement post connection and element removing steps for `selectedcontent`. r=#dom-core!,keithamus

Comment 7

[Jan Jaeschke [:jjaschke]]

Attachment: WIP: Bug 1974276, part 5 - Customizable Select: Update selected content when changing a select's value programmatically. r=#dom-core!,keithamus

Comment 8

[Phabricator Automation]

Comment on attachment 9536614 [details]
Bug 1974276, part 1 - Customizable Select: Add pref. r=keithamus!

Revision D278469 was moved to bug 2017595. Setting attachment 9536614 [details] to obsolete.

Comment 9

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276 - Customizable Select: Implement stub for the selectedcontent element. r=#dom-core,keithamus,emilio

Comment 10

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 2 - Customizable Select: Implement selectedcontent update machinery. r=#dom-core,keithamus,emilio!

Implement the selectedcontent element's insertion steps (disabled logic,
ancestor walk) and post-connection steps (synchronous update from nearest
ancestor select). Add the core update algorithms on HTMLSelectElement:
UpdateDescendantSelectedContentElements, UpdateSelectedContentElement,
CloneOptionIntoSelectedContent, and GetEnabledSelectedContent.

Comment 11

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 3 - Customizable Select: Support options inside wrapper elements. r=#dom-core,keithamus,emilio!

Call UpdateDescendantSelectedContentElements from SetSelectedIndex, SetValue,
UserFinishedInteracting (send select update notifications), BeforeSetAttr
(multiple attribute change), RestoreStateTo, and Reset.

Comment 12

[Jan Jaeschke [:jjaschke]]

Attachment: WIP: Bug 1974276, part 4 - Customizable Select: Update selectedcontent when option finishes parsing. r=#dom-core,keithamus

When an option element is popped off the stack of open elements, clone its
contents into the select's descendant selectedcontent elements if the option
is selected.

Comment 13

[Jan Jaeschke [:jjaschke]]

Attachment: WIP: Bug 1974276, part 5 - Customizable Select: Implement spec selectedness setting algorithm with cached nearest ancestor select. r=#dom-core,keithamus

Implement the selectedness setting algorithm from whatwg/html#12263: a
single-pass loop that skips options whose cached nearest ancestor select is
null, deselects all but the last selected option, auto-selects the first
enabled option if none selected, and synchronously updates descendant
selectedcontent elements.

Add cached nearest ancestor select pointer to HTMLOptionElement (per
whatwg/html#11790). Hook into BindToTree/UnbindFromTree as option
insertion/removal steps. Replace CheckSelectSomething in
InsertOptionsIntoList, RemoveOptionsFromList, and select's DoneAddingChildren
with RunSelectednessSettingAlgorithm when the customizable select pref is
enabled.

Comment 14

[Jan Jaeschke [:jjaschke]]

Attachment: Bug 1974276, part 4 - Customizable Select: Update test expectations. r=#dom-core,keithamus!

Comment 15

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/10781ef5fa27
https://hg.mozilla.org/integration/autoland/rev/7b099714577c
Customizable Select: Implement stub for the selectedcontent element. r=keithamus,emilio,dom-core,webidl,hsivonen

Comment 16

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/7b099714577c

Comment 17

[Henri Sivonen (:hsivonen) (not reading bugmail until 2026-07-27)]

https://github.com/validator/htmlparser/commit/8f7cfc3b0f40939d4d98d2a84b76763013bc8b49

Comment 18

[Phabricator Automation]

Comment on attachment 9559397 [details]
Bug 1974276, part 2 - Customizable Select: Implement selectedcontent update machinery. r=#dom-core,keithamus,emilio!

Revision D290554 was moved to bug 2038588. Setting attachment 9559397 [details] to obsolete.

Comment 19

[Phabricator Automation]

Comment on attachment 9559398 [details]
Bug 1974276, part 3 - Customizable Select: Support options inside wrapper elements. r=#dom-core,keithamus,emilio!

Revision D290555 was moved to bug 1974784. Setting attachment 9559398 [details] to obsolete.

Comment 20

[Dave Letorey]

Marked as Dev-Doc-Complete, as this feature is sufficiently documented, even though at present this does not do anything.