On Thu, Jun 12, 2014 at 12:48 PM, Jason Orendorff <jorendorff at mozilla.com <https://mail.mozilla.org/listinfo/es-discuss>> wrote: >/ In any case, I doubt we have a choice. ES3-5 at least supported it. There is />/ surely a Web page somewhere that calls .toString() on every object it can />/ find, just because. /
Or a web page converts some value to a string using `"" + someValue`, in which case adding a toString() legacy mode is not sufficient, because valueOf() is actually invoked (well, except for Date.prototype because of its @@toPrimitive override). Does that mean valueOf() also needs to have a legacy mode to special case the prototype object?
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