[Webkit-unassigned] [Bug 258282] REGRESSION (STP 172): Broke custom element built-in polyfill by making form properties non deletable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258282

--- Comment #6 from mic.gallego at gmail.com ---
(In reply to Ryosuke Niwa from comment #5)
> (In reply to Andrea Giammarchi from comment #3)
> > Polyfill author here. I am not sure if it's a regression or an intended
> > behavior but the form gets an own `0` property which I believe is the button
> > within the form (I can't test as I'm on WebKit non TP)
> > 
> > Live example here: https://codepen.io/bakura10/pen/mdQERdX
> 
> When I open this URL in STP172, I see "CONNECTED" in console and there is no
> other error emitted. What exactly is the symptom I should be looking for?

This happens because I tried with an updated polyfill that Andrea created. The previous version (the one that was using for years) is the one that broke.

I re-updated the CodePen to use the previous polyfill version. You should now exhibit the issue again.

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