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by ryanwatkins 2952 days ago
Version in the type attribute used to be there with Mozilla. They removed it. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/sc... https://bugzilla.mozilla.org/show_bug.cgi?id=1428745
1 comments

I believe MS has also moved away from its various JS modes.

I suspect that the cost (in both maintenance hours and performance overhead) to maintain parallel JS engines is extremely non-trivial.