Standardizing __proto__

John-David Dalton john.david.dalton at
Fri Mar 18 09:29:00 PDT 2011

> That said your examples environments that support it is slightly misleading as there's only a few JS engines being used between them: Caraken
> (Opera person is this correct?), JavaScriptCore, SpiderMonkey and V8.   AIR uses webkit so pulls in JSC, and presumably ActionScript as well,
> although ActionScript is not really an ES engine so i'm unsure if it counts to this discussion.

The point is __proto__ has a very long history and is supported by
more browsers/environments than it's not.

@Mike Shaver
For other possible uses please check out:
and follow the bug report.

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