AbortController and AbortSignal not supported in Safari 12

[DavidBruant]

Current browser compat suggests it is supported, but caniuse informs the object is a useless placeholder

[Elchi3]

Did this PR solve this #3241? Or is it really completely useless and should be marked false?

[ddbeck]

@Elchi3 FWIW, when reviewing that PR, I considered asking the author to go with false instead. My reasoning for not doing it was by analogy to something that came up in the CSS migrations, where some properties were recognized but didn't do anything. This is surprising, non-standard behavior (as opposed to an obvious ReferenceError).

[DavidBruant]

Did this PR solve this #3241?

oh i didn't look for PRs, sorry
it's the same topic indeed

Or is it really completely useless and should be marked false?

I would argue in the direction of false given that, from what i understand, the global is useless and doesn't abort fetch requests (which is the main use case for this feature at this point)

But i guess the "partial implementation" is fine at this point since it seems like it should be in the next version of Safari, so this detail will soon be lost in the history of the web

[Elchi3]

Thanks! The table is showing the partial support for now with a link to details of the situation. Hopefully a future Safari version fixes it.