To reduce bundle size

npm install --save @sozialhelden/ietf-language-tags

> @sozialhelden/[email protected] postinstall /Users/project/functions/node_modules/@sozialhelden/ietf-language-tags
> cp -r ./node_modules/language-subtag-registry/data/json ./src

cp: ./node_modules/language-subtag-registry/data/json: No such file or directory
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @sozialhelden/[email protected] postinstall: `cp -r ./node_modules/language-subtag-registry/data/json ./src`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @sozialhelden/[email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Doesn't work even if I install language-subtag-registry separately on the same directory.

TypeScript fails to work properly with this package at the moment because the module and types property of the distributed package.json are pointing to non-existent properties.

(PR to come later)

Workarounds

Add a (temporary) path binding to the proper file

When you upgrade your packages later on, this shouldn't break anything, and requires no modification of your code or the installed package.

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es6",
    "outDir": "dist",
    "rootDir": ".",
    "sourceMap": true,
    "strict": false,
    "esModuleInterop": true,
    "paths": {
      "@sozialhelden/ietf-language-tags": [
        "./node_modules/@sozialhelden/ietf-language-tags/dist/esm/index.js"
      ],
    }
  }
}

Reference the esm module directly from your code

This has the undesirable side effect of adding many ../../ to your code...

import {
	normalizeLanguageTagCasing,
	parseLanguageTag,
} from '../../node_modules/@sozialhelden/ietf-language-tags/dist/esm/';

Update the installed package

If you update node_modules/@sozialhelden/ietf-language-tags/package.json to use the esm outputs, typescript works properly, but this affects the ability to use npm install, so it may not be preferable, esp in CI/CD environments.

{
   "module": "dist/esm/index.js",
   "types": "./dist/esm/index.d.ts"
}