Bug 188629

Summary:	Constructing a custom element should immediately execute microtasks if there are no scripts
Product:	WebKit	Reporter:	Ryosuke Niwa <rniwa>
Component:	DOM	Assignee:	Ryosuke Niwa <rniwa>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	cdumez, fred.wang, megdy.zawady, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	154907

Description Ryosuke Niwa 2018-08-15 20:54:11 PDT

Via step 6.2. of https://dom.spec.whatwg.org/#concept-create-element
to step 13.2. of https://heycam.github.io/webidl/#construct-a-callback-function
to step 3 of https://html.spec.whatwg.org/multipage/webappapis.html#clean-up-after-running-script
we should be executing microtasks immediately after constructing a custom element.

This bug was caught by a test case in LayoutTests/imported/w3c/web-platform-tests/custom-elements/microtasks-and-constructors.html

Comment 1 Ryosuke Niwa 2022-07-06 13:10:19 PDT

Pull request: https://github.com/WebKit/WebKit/pull/2132

Comment 2 EWS 2022-07-06 14:56:16 PDT

Committed 252190@main (e7be2359033b): <https://commits.webkit.org/252190@main>

Reviewed commits have been landed. Closing PR #2132 and removing active labels.

Comment 3 Radar WebKit Bug Importer 2022-07-06 14:57:13 PDT

<rdar://problem/96550519>