undefined is not a function, when using JSPM CDN

[trusktr]

This has an error:

playground link

Uncaught TypeError: r.escape is not a function

Here's the same example but using the local node_modules from docs.lume.io (it currently has the same 0.3.0-alpha.19 version of lume installed, see the version logged to console):

playground link

Just to double check, JSPM's importmap is getting 1.6.0:

https://ga.jspm.io/npm:regexr@1.6.0/index.js

And the one from docs.lume.io is currently the same version:

https://docs.lume.io/node_modules/regexr/package.json

{
    "name": "regexr",
    "version": "1.6.0",

Search for r.escape in this file:

https://docs.lume.io/node_modules/regexr/src/index.js

[trusktr]

Ah, looks like JSPM picks regex@1.6.0/index.js (the non-ESM file, which has the CommonJS default export discrepancy), while my importmap is mapping to regexr@1.6.0/src/index.js (the actual ESM file).

Looks like this could be solved with an override, but regexr 2.0 is already out, published as ESM and type:module, so a better fix is to get the depedency updated in Lume.

[trusktr]

I thought a workaround would be to manually change the generated importmap to point to the src/index.js ESM file, but apparently JSPM does not expose that file. This link is 404:

https://ga.jspm.io/npm:regexr@1.6.0/src/index.js

playground link

Here's what we see on unpkg:

https://unpkg.com/regexr@1.6.0/src/index.js

This makes it a bit difficult to perform an immediate workaround.

---

Should JSPM CDN allow fetching different files, like unpkg does, to make workarounds for these sort of situations easy?

Regexr 1.6 doesn't have type:module or an exports field, so the file not being exposed seems like an arbitrary limitation.

[guybedford]

JSPM does not expose all files in a package, only those that are reachable. It is not a direct npm mirror but instead a modular build of npm packages.

Because the package.json "exports" field is encapsulating, other files are now non-reachable via import in Node.js and other environments.

This same property of non-reachability is also what enables the JSPM package optimizations to apply.

[trusktr]

regexr 1.6 does not have an exports field though:

https://unpkg.com/browse/regexr@1.6.0/package.json

The expecation of publishing a package *without* an exports field (f.e. to NPM) is that we can simply import any file from that package.

[guybedford]

This should be working now if you clear your browser cache.