across the board. The only browser that seems to be lagging
behind is Opera, for reasons beyond me. Opera still holds on
to ES3.
Actually, Opera supports (small) parts of ES5:
http://www.opera.com/docs/specs/presto28/ecmascript/
Interesting, though - I never noticed how small those parts
are, given that they are generally much better at implementing
web specifications early, including useful JS APIs:
http://www.opera.com/docs/specs/
If I may throw in a related question, since JScript and Javascript
versions were mentioned:
Is there any way to make Windows Scripting Host use IE9's
Javascript engine, instead of the old one from IE8? Both in
terms of features and performance, it would be nice to move
on.
Claus
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