Re: [whatwg/webidl] No support about @@unscopables inheritance (Issue #1221) from Domenic Denicola on 2022-10-19 (public-webapps-github@w3.org from October 2022)

From: Domenic Denicola <notifications@github.com>
Date: Tue, 18 Oct 2022 21:23:53 -0700
To: whatwg/webidl <webidl@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <whatwg/webidl/issues/1221/1283405800@github.com>

I agree this is an issue.

As discussed with @yuki3 in person, there are two solutions: we could make `Derived.prototype[Symbol.unscopables]` be `{foo: true, bar: true}`, or we could make `Derived.prototype[Symbol.unscopables]` be `{bar: true, __proto__: Base.prototype[Symbol.unscopables]}`.

I suspect the former is easier to implement and a bit simpler. (And theoretically probably a bit faster for engines to optimize, but, if you're using `with` anyway, you're probably already on the super-slow path.)

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Received on Wednesday, 19 October 2022 04:24:06 UTC