[Webkit-unassigned] [Bug 253423] New: setInterval and setTimeout order isn't respected when timeout is 0

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253423

            Bug ID: 253423
           Summary: setInterval and setTimeout order isn't respected when
                    timeout is 0
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tristan.fraipont at gmail.com

Created attachment 465310

  --> https://bugs.webkit.org/attachment.cgi?id=465310&action=review

Test case

Online test case: https://jsfiddle.net/7g5f0cLz/
1. Queue a callback using setInterval(cb1, 0);
2. Queue a callback using setTimeout(cb2, 0);

The callback queued through setTimeout() is executed before the one queued through setInterval().
You can see this StackOverflow answer of mine https://stackoverflow.com/a/75646343/3702797 for a walk-through of the specs showing how this behavior is wrong. Basically, with the same ms value, the order should be respected.

Passing another ms value than 0 will make it behave normally.

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