Bug 213244

Summary:	Variables declared with "let" keyword are not recognized by separate .js files
Product:	WebKit	Reporter:	Farley Reynolds <farleykreynolds>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	fpizlo, saam, webkit-bug-importer, ysuzuki
Priority:	P2	Keywords:	InRadar
Version:	Safari 13
Hardware:	Unspecified
OS:	Unspecified

Description Farley Reynolds 2020-06-16 05:11:23 PDT

If a variable is declared at the global level with the "let" keyword, functions in other files cannot access it.

If the declaration is changed to use the "var" keyword, the other files are able to access it.

This issue seems to arise when a JavaScript module calls the function that requires the global variable.

I was able to confirm that no other browsers display the issue with the "let" keyword.

Comment 1 Radar WebKit Bug Importer 2020-06-17 18:05:34 PDT

<rdar://problem/64471510>

Comment 2 Saam Barati 2020-06-17 22:32:38 PDT

(In reply to Farley Reynolds from comment #0)
> If a variable is declared at the global level with the "let" keyword,
> functions in other files cannot access it.
> 
> If the declaration is changed to use the "var" keyword, the other files are
> able to access it.
> 
> This issue seems to arise when a JavaScript module calls the function that
> requires the global variable.
> 
> I was able to confirm that no other browsers display the issue with the
> "let" keyword.

Can you post an example?