Cannot import npm:@mobily/[email protected]

[scarf005]

To reproduce

import { A } from 'npm:@mobily/[email protected]'
// however, this will work
// import { A } from "https://esm.sh/@mobily/[email protected]"

console.log(A.zip)

would there be a reason why esm.sh works but npm: specifier does not?

Error log

error: 'import', and 'export' cannot be used outside of module code at file:///home/scarf/.cache/deno/npm/registry.npmjs.org/@mobily/ts-belt/3.13.1/dist/esm/index.js:1:1

index.js

// file:///home/scarf/.cache/deno/npm/registry.npmjs.org/@mobily/ts-belt/3.13.1/dist/esm/index.js:1:1
import { pipe } from "./pipe.js";
import { flow } from "./flow.js";
import * as F from "./Function";
import * as A from "./Array";
import * as R from "./Result";
import * as G from "./Guards";
import * as O from "./Option";
import * as S from "./String";
import * as D from "./Dict";
import * as B from "./Bool";
import * as N from "./Number";
export {
  A,
  B,
  D,
  F,
  G,
  N,
  O,
  R,
  S,
  flow,
  pipe
};

[aW4KeNiNG]

@scarf005 did you find any solution using npm?

[dsherret]

Investigated and this package's ESM build is broken and doesn't work in Node.js either.

> touch package.json
> deno install npm:@mobily/[email protected]
> echo 'import * as test from '@mobily/ts-belt'; console.log(test)' > main.mjs
> deno run main.mjs
error: [ERR_UNSUPPORTED_DIR_IMPORT] Directory import 'file:///V:/scratch/node_modules/.deno/@[email protected]/node_modules/@mobily/ts-belt/dist/esm/Function' is not supported resolving ES modules imported from 'file:///V:/scratch/node_modules/.deno/@[email protected]/node_modules/@mobily/ts-belt/dist/esm/index.js'
> node main.mjs
(node:39952) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
(Use `node --trace-warnings ...` to show where the warning was created)
V:\scratch\node_modules\.deno\@[email protected]\node_modules\@mobily\ts-belt\dist\esm\index.js:1
import { pipe } from "./pipe.js";
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at wrapSafe (node:internal/modules/cjs/loader:1376:18)
    at Module._compile (node:internal/modules/cjs/loader:1405:20)
    at Module._extensions..js (node:internal/modules/cjs/loader:1544:10)
    at Module.load (node:internal/modules/cjs/loader:1275:32)
    at Module._load (node:internal/modules/cjs/loader:1091:12)
    at wrapModuleLoad (node:internal/modules/cjs/loader:212:19)
    at cjsLoader (node:internal/modules/esm/translators:318:5)
    at ModuleWrap.<anonymous> (node:internal/modules/esm/translators:258:7)
    at ModuleJob.run (node:internal/modules/esm/module_job:262:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:474:24)

Node.js v22.3.0
> node --experimental-detect-module main.mjs
node:internal/modules/esm/resolve:254
    throw new ERR_UNSUPPORTED_DIR_IMPORT(path, fileURLToPath(base), String(resolved));
          ^

Error [ERR_UNSUPPORTED_DIR_IMPORT]: Directory import 'V:\scratch\node_modules\.deno\@[email protected]\node_modules\@mobily\ts-belt\dist\esm\Function' is not supported resolving ES modules imported from V:\scratch\node_modules\.deno\@[email protected]\node_modules\@mobily\ts-belt\dist\esm\index.js
    at finalizeResolution (node:internal/modules/esm/resolve:254:11)
    at moduleResolve (node:internal/modules/esm/resolve:920:10)
    at defaultResolve (node:internal/modules/esm/resolve:1119:11)
    at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:541:12)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:510:25)
    at ModuleLoader.getModuleJob (node:internal/modules/esm/loader:240:38)
    at ModuleJob._link (node:internal/modules/esm/module_job:126:49) {
  code: 'ERR_UNSUPPORTED_DIR_IMPORT',
  url: 'file:///V:/scratch/node_modules/.deno/@[email protected]/node_modules/@mobily/ts-belt/dist/esm/Function'
}

Node.js v22.3.0

The package's ESM export needs to be updated to work or it should be removed and the package should only ship CJS.

Follow mobily/ts-belt#117 for updates.