ES3.1 Draft: 11 June 2008 version available

Maciej Stachowiak mjs at
Sat Jun 14 22:49:48 PDT 2008

On Jun 14, 2008, at 12:21 PM, Mark S. Miller wrote:

> On Fri, Jun 13, 2008 at 2:44 PM, Mark Miller <erights at>  
> wrote:
>> On Fri, Jun 13, 2008 at 11:20 AM, Lars Hansen <lhansen at>  
>> wrote:
>>>> What
>>>> other "with" do people imagine is compatible with strict
>>>> mode? I must have missed something.
>>> The one in ES3.  What makes it not compatible with strict mode?
>> Doesn't it make static scope analysis impossible?
> Deleting a variable also makes static scope analysis impossible.
> (Deleting a property is fine.)

Deleting a variable is only possible for variables introduced by eval,  
and I gather eval will not be able to inject bindings into local scope  
in strict mode.

> Once try/catch is fixed, I can't think of anything else that prevents
> static scope analysis of ES3.1 strict or ES4 strict. Does anyone know
> of any other cases?

Named function expressions have the same kind of problem as try/catch  
(assuming the problem is a random non-activation object being on the  
scope chain).


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