let and file scope

# Mark Volkmann (11 years ago)

Does a top-level let in a file (not inside any function) create a global variable just like var or does it create a variable that is scoped to the source file?

Does a top-level let in a file (not inside any function) create a global variable just like var or does it create a variable that is scoped to the source file?

---
R. Mark Volkmann
Object Computing, Inc.

# Ryan Scheel (11 years ago)

It creates a variable scoped to the source file.

It creates a variable scoped to the source file.


On Sat, Mar 1, 2014 at 4:38 PM, Mark Volkmann <r.mark.volkmann at gmail.com>wrote:

> Does a top-level let in a file (not inside any function) create a global
> variable just like var or does it create a variable that is scoped to the
> source file?
>
> ---
> R. Mark Volkmann
> Object Computing, Inc.
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
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# Rick Waldron (11 years ago)

Here is the consensus from the "revisit": rwaldron/tc39-notes/blob/master/es6/2012-09/sept-19.md#conclusionresolution

Here is the consensus from the "revisit":
https://github.com/rwaldron/tc39-notes/blob/master/es6/2012-09/sept-19.md#conclusionresolution-8


Rick


On Sun, Mar 2, 2014 at 2:37 AM, Ryan Scheel <ryan.havvy at gmail.com> wrote:

> It creates a variable scoped to the source file.
>
>
> On Sat, Mar 1, 2014 at 4:38 PM, Mark Volkmann <r.mark.volkmann at gmail.com>wrote:
>
>> Does a top-level let in a file (not inside any function) create a global
>> variable just like var or does it create a variable that is scoped to the
>> source file?
>>
>> ---
>> R. Mark Volkmann
>> Object Computing, Inc.
>> _______________________________________________
>> es-discuss mailing list
>> es-discuss at mozilla.org
>> https://mail.mozilla.org/listinfo/es-discuss
>>
>
>
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
>
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# Allen Wirfs-Brock (11 years ago)

a bit of additional clarification: It depends upon whether the file is a module or a script file. If it is a module, then let-like declarations have file scope. If it is a normal script, then let-like declarations are global scope (visible to multiple script files) but does not create a property on the global object.

On Mar 2, 2014, at 11:51 AM, Rick Waldron wrote:

> Here is the consensus from the "revisit": https://github.com/rwaldron/tc39-notes/blob/master/es6/2012-09/sept-19.md#conclusionresolution-8
> Rick
> 
> On Sun, Mar 2, 2014 at 2:37 AM, Ryan Scheel <ryan.havvy at gmail.com> wrote:
> It creates a variable scoped to the source file.
> 
> On Sat, Mar 1, 2014 at 4:38 PM, Mark Volkmann <r.mark.volkmann at gmail.com> wrote:
> Does a top-level let in a file (not inside any function) create a global variable just like var or does it create a variable that is scoped to the source file?
> 

a bit of additional clarification:  It depends upon whether the file is a module or a script file.  If it is a module, then let-like declarations have file scope.  If it is a normal script, then let-like declarations are global scope (visible to multiple script files) but does not create a property on the global object.

Allen
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# Rick Waldron (11 years ago)

I missed this when I searched my notes on github: rwaldron/tc39-notes/blob/master/es6/2013-11/nov-21.md#46-the-global-scope-contour (credit to Brian Terlson for alerting me)

On Sun, Mar 2, 2014 at 3:07 PM, Allen Wirfs-Brock <allen at wirfs-brock.com>wrote:

>
> On Mar 2, 2014, at 11:51 AM, Rick Waldron wrote:
>
> Here is the consensus from the "revisit":
> https://github.com/rwaldron/tc39-notes/blob/master/es6/2012-09/sept-19.md#conclusionresolution-8
>
> Rick
>
> On Sun, Mar 2, 2014 at 2:37 AM, Ryan Scheel <ryan.havvy at gmail.com> wrote:
>
>> It creates a variable scoped to the source file.
>>
>> On Sat, Mar 1, 2014 at 4:38 PM, Mark Volkmann <r.mark.volkmann at gmail.com>wrote:
>>
>>> Does a top-level let in a file (not inside any function) create a global
>>> variable just like var or does it create a variable that is scoped to the
>>> source file?
>>>
>>>
> a bit of additional clarification:  It depends upon whether the file is a
> module or a script file.  If it is a module, then let-like declarations
> have file scope.  If it is a normal script, then let-like declarations are
> global scope (visible to multiple script files) but does not create a
> property on the global object.
>

I missed this when I searched my notes on github:
https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-11/nov-21.md#46-the-global-scope-contour(credit
to Brian Terlson for alerting me)

Rick




>
> Allen
>
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