I hadn't reviewed the 9-27 draft's 15.2.4.2 Object.prototype.toString () yet. It seems to suppress exceptions, which is bad (step 6(c)(ii)). The ...(iv) substitution of "???" for must be a placeholder but why not throw there (in the case where @@toStringTag's value is not of String type)?

The main thing I missed there is the prefixing of "~" on any tag naming a core language built-in constructor. What's this for? Why not for DOM built-ins too?

/be

Yusuke Suzuki wrote:

    Mark S. Miller wrote:

        Security aside, given maximin

            class Foo

        what do you suggest Foo.prototype be?


I suggest adding @@toStringTag:"Foo" property to Foo.prototype when `class Foo` is executed.

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