[Webkit-unassigned] [Bug 187386] Sometimes "x instanceof Worker" inappropriately returns false

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Jul 9 08:58:09 PDT 2018


--- Comment #1 from Chris Dumez <cdumez at apple.com> ---
One common way this happens is when the page's JavaScript messes with the Worker's prototype chain in some way (so Worker or EventTarget). Some script does this to extend the API of a particular type.

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