[Webkit-unassigned] [Bug 188629] New: Constructing a custom element should immediately execute microtasks if there are no scripts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188629

            Bug ID: 188629
           Summary: Constructing a custom element should immediately
                    execute microtasks if there are no scripts
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org
                CC: cdumez at apple.com

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

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