do-while grammar

Juriy Zaytsev kangax at
Tue Feb 8 14:55:46 PST 2011

On Tue, Feb 8, 2011 at 5:01 PM, Mark S. Miller <erights at> wrote:

> Does anyone know of any other syntax that all major JS engines accept that
> are not in the official ES5.1 grammar?
> Does anyone know of any places on the web attempting to accumulate such
> exceptions?

I've been meaning to start a place like that, but haven't had a chance yet.


Lasse recently posted about regex deviations here — S. Levithan
should probably know more cases.

Someone who worked on ES parser recently, like Benjamin Rosseaux (author of
BESEN) or Peter van der Zee (ES parser at might be
able to throw in more cases (cc'ing them).

That couple-years-old MS document about JScript deviations might have more.


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