ESM file extension

[Diluka]

internal/modules/cjs/loader.js:1015
      throw new ERR_REQUIRE_ESM(filename, parentPath, packageJsonPath);
      ^

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /path/to/proj/node_modules/quick-lru/index.js
require() of ES modules is not supported.
require() of /path/to/proj/node_modules/quick-lru/index.js from /path/to/proj/dist/src/ih-user/ih-user.guard.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /path/to/proj/node_modules/quick-lru/package.json.

like this?

{
  "main": "index.cjs.js",
  "module": "index.esm.js"
}

[sindresorhus]

Please read the release notes.

[Diluka]

so this lib will no longer available in express projects? a lot of nodejs packages are only support commonjs

[sindresorhus]

ESM can import CommonJS, so you can convert your project to ESM, while still importing CommonJS dependencies. I would recommend reading up on ESM.

[Diluka]

I tried, and give up. There are some file extension naming issue with typescript in nodejs. It is not easy to change a nest.js project from commonjs to esm.

end up here:

internal/process/esm_loader.js:74
    internalBinding('errors').triggerUncaughtException(
                              ^

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/path/to/proj/dist/src/bootstrap.module' imported from /path/to/proj/dist/src/main.js
    at finalizeResolution (internal/modules/esm/resolve.js:271:11)
    at moduleResolve (internal/modules/esm/resolve.js:694:10)
    at Loader.defaultResolve [as _resolve] (internal/modules/esm/resolve.js:784:11)
    at Loader.resolve (internal/modules/esm/loader.js:100:40)
    at Loader.getModuleJob (internal/modules/esm/loader.js:246:28)
    at ModuleWrap.<anonymous> (internal/modules/esm/module_job.js:47:40)
    at link (internal/modules/esm/module_job.js:46:36) {
  code: 'ERR_MODULE_NOT_FOUND'
}

[aleclarson]

Just use v5.

@sindresorhus Can we backport the maxAge commit to v5? 85f49e2

edit: See #30

[KODerFunk]

@sindresorhus Real problems with ts-node setup.

[danissimus]

Today I tried to use this package in NextJS, but got exception about esm. NextJS provides esm support via build system on top of webpack, but it does not expose it's internals. Attempts to configure it to work with esm modules only are not acceptable because of old browsers support.

[zaadevofc]

i just downgrade to v@5.1.1

[Diluka]

@zaadevofc try https://www.npmjs.com/package/@alloc/quick-lru backport new featue to commonjs version