Esm: instanceof check failing as of 3.0.27

[chadxz]

In my package awry I have some instanceof checks in my tests. These aren't terribly important, but I found it odd that they were passing in 3.0.26 of esm and failing in 3.0.27.

Any idea why that might be?

specifically these tests:
https://github.com/chadxz/awry/blob/04c882f3864e2b1749d0823452be72e9e3e90fe0/test/api/index.spec.mjs

[jdalton]

Hi @chadxz!

At first guess it looks like it could be related to CJS named exports tweaks or maybe not.
Could you create a simple repro that I can investigate.

Update:

No need for a repro _(I used awry as one)_.
I narrowed the problem commit down to https://github.com/standard-things/esm/commit/c36988de6d3ffc5d85dd81a87974b4cf50b3c922.

Update:

Fixed it locally changing

if (isUnexposed &&
    extname(filename) === ".mjs") {

to

if (isUnexposed ||
    extname(filename) === ".mjs") {

[chadxz]

Cool. thank you

[jdalton]

Patch https://github.com/standard-things/esm/commit/11614f1c505180407b0668412145731bd4a6d36d.

[jdalton]

v3.0.28 is released 🎉