Apparently, this problem was already known more than 4 months ago:
https://bugzilla.mozilla.org/show_bug.cgi?id=924386#c19
I guess it specifically affect the mobile web? for it didn't prevent Firefox to
ship `Array.prototype.entries` in v28, released on March 18.
—Claude
Le 17 juin 2014 à 01:08, Oliver Hunt <oli...@apple.com> a écrit :
> It turns out there are a number of sites (such as mobile.twitter.com) that
> are property detecting .entries on objects, and that means that they're
> breaking when Array.prototype.entries is provided.
>
> We're removing it from JSC now, until we can find a way to expose it without
> causing site breakage, although this does seem like fixing it would require
> bringing back the awful "pretend that you're undefined" horror.
>
> --Oliver
>
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