Importing ESM index modules throws an error during module resolution

[pcwiek]

IxJS version: 6.0.0

NodeJS 22.4

Code to reproduce:

> var f = await import('ix/asynciterable/operators/index');
Uncaught:
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Users/p/project/node_modules/ix/asynciterable/operators/ignoreelements' imported from /Users/p/project/node_modules/ix/asynciterable/operators/index.mjs
    at finalizeResolution (node:internal/modules/esm/resolve:260:11)
    at moduleResolve (node:internal/modules/esm/resolve:921:10)
    at defaultResolve (node:internal/modules/esm/resolve:1120:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:557:12)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:526:25)
    at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:249:38) {
  code: 'ERR_MODULE_NOT_FOUND',
  url: 'file:///Users/p/project/node_modules/ix/asynciterable/operators/ignoreelements'
}

> var f = await import('ix/asynciterable/index');
Uncaught:
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Users/p/project/node_modules/ix/asynciterable/includes' imported from /Users/p/project/node_modules/ix/asynciterable/index.mjs
    at finalizeResolution (node:internal/modules/esm/resolve:260:11)
    at moduleResolve (node:internal/modules/esm/resolve:921:10)
    at defaultResolve (node:internal/modules/esm/resolve:1120:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:557:12)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:526:25)
    at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:249:38) {
  code: 'ERR_MODULE_NOT_FOUND',
  url: 'file:///Users/p/project/node_modules/ix/asynciterable/includes'
}

Expected behavior:

index modules resolve without issues

Actual behavior:

import fails

Additional information:

There's a workaround: do not use index files, but import specific modules separately.

For example:

import { buffer } from 'ix/asynciterable/operators/buffer';
import { catchError } from 'ix/asynciterable/operators/catcherror';
import { delay } from 'ix/asynciterable/operators/delay';
import { filter } from 'ix/asynciterable/operators/filter';
import { finalize } from 'ix/asynciterable/operators/finalize';
import { map } from 'ix/asynciterable/operators/map';
import { memoize } from 'ix/asynciterable/operators/memoize';
import { from } from 'ix/asynciterable/asynciterablex';

instead of:

import { buffer, catchError, delay, filter, finalize, map, memoize } from 'ix/asynciterable/operators/index';
import { from } from 'ix/asyncinterable/index';

Side note: Since we're already here, there's a typo in throwError module name

import { throwError } from 'ix/asynciterable/throwerrror';

There's one r too many in error 😉 It's working just fine though, and I realize that would probably be a breaking change now, so 🤷🏻

[trxcllnt]

Thanks for the report, looks like I missed adding .js to some of the imports in the source. I'll have a PR up shortly, along with a fix for the UMD bundles that should let me test importing all the subpath exports in CI.

[trxcllnt]

Fixed in ix v7.0.0