Re: [heycam/webidl] Can FrozenArray<T> be used for a mutable attribute? (#265)

> This is the only mutable FrozenArray<T> attribute in Blink, and perhaps the first in any spec

As far as I'm aware, that's correct.

> so I thought it best to check if behavior like this is fine

The behavior you describe is the currently specced behavior, for what it's worth.  Also note:

    var artwork = [];
    metadata.artwork = artwork;
    artwork = metadata.artwork;
    metadata.artwork = artwork;
    assert_not_equals(metadata.artwork, artwork);

Unfortunately there aren't really better options here, which is why FrozenArray is specced the way it's specced.

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