Prevent export of $$default

[ryyppy]

No matter if I am using an interface file or not, this code:

let default = ""

will emit following js:

exports.$$default = $$default;
exports.default = $$default;

Is there a way to prevent $$default to be exported? This messes with tools like Storybook, which iterates over the exports of a component.

I assume this is required to be able to use values across ReScript modules?

[giraud]

I had the same problem https://forum.rescript-lang.org/t/default-export-and-storybook-csf/527, used a workaround

[bobzhang]

the compiler in general handles exports in a uniform way, so we got exports.[xx] = [xx].
$$default is used since var default = "" is a syntax error

[ryyppy]

it's just weird that it creates an additional export, even though it already exports a clean default already.

Would be nice if those additional $$ exports wouldn't happen in case there is a clean export, but I can see how this might make things more complicated.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[zth]

@ryyppy here's a #6328 simple test of not emitting the $$default export. At a first glance I think it looks innocent enough, but we need to investigate a bit further.

I'd expect this to be fine, because you're never actually defining $$default in ReScript anyway, so you shouldn't expect it to be exported.