[Webkit-unassigned] [Bug 281961] New: To signal abort, if the reason is not given, set a new "AbortError" DOMException

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=281961

            Bug ID: 281961
           Summary: To signal abort, if the reason is not given, set a new
                    "AbortError" DOMException
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: me at marais.co

In the DOM specification for the AbortSignal (see: https://dom.spec.whatwg.org/#abortsignal-signal-abort), point 2 states:

> Set signal's abort reason to the provided reason if given; otherwise, set it to a new "AbortError" DOMException.

We are not currently implementing this behavior. Instead, it's being handled in the IDL bindings for AbortController, which lacks any specification for signaling an abort.

If there is any internal code that calls `AbortSignal::signalAbort`, we should ensure it adheres to this DOM specification — and not leak this implementation detail.

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