[Webkit-unassigned] [Bug 137496] Add a microtask abstraction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=137496

--- Comment #12 from Sam Weinig <sam at webkit.org> ---
Microtasks are defined as being per Event Loop (https://html.spec.whatwg.org/multipage/webappapis.html#event-loops), which is not quite the same as per-document.  I believe this would be observable, as microtasks in multiple documents would be run out of phase.

I also think this would be testable by moving Mutation Observers over to the new abstraction as you build it. Or, if you prefer a less invasive change at the same time, you could add an Internal function that queues a microtask, and use that for testing.

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