Changing [[Prototype]]

Andreas Rossberg rossberg at
Fri Dec 28 11:48:37 PST 2012

On 28 December 2012 19:55, Mark S. Miller <erights at> wrote:

> That is exactly the issue. As long as it was not expected in IE, it
> could not be assumed by the cross-browser web. However, mobile changed
> MS's tradeoffs. Mobile is currently a separate enough ecosystem, with
> IE a sufficiently minor player, that some cross-mobile-platform code
> assumes mutable __proto__. Consider it a loss of genetic diversity on
> the part of a herd that gets temporarily separated from the rest of
> its species. As a result, MS is considering adding mutable __proto__
> to future IE. At that point, it would become a standard, at least de
> facto. In that case, we're all better off codifying a semantics and
> having this standard be de jure.

All understood, but what's the difference to __defineGetter__?

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