Constant Error: Cannot find module 'typescript'

[speechless2]

Environment

Operating System: Linux

• Node Version: v21.6.1
• Nuxt Version: 3.11.2
• CLI Version: 3.11.1
• Nitro Version: 2.9.6
• Package Manager: [email protected]
• Builder: -
• User Config: devtools, modules
• Runtime Modules: @nuxt/[email protected]
• Build Modules: -

Package

@nuxt/eslint

Reproduction

Fresh install of nuxt3 and nuxt-eslint module, just followed the tutorial

Describe the bug

Once i finished the tutorial on how to use:

https://eslint.nuxt.com/packages/module#quick-setup
with this command:

npx nuxi module add eslint

and try to yarn lint

i got this error:

Oops! Something went wrong! :(

ESLint: 9.3.0

Error: Cannot find module 'typescript'
Require stack:

Additional context

No response

Logs

No response

[mstflotfy]

Just had the same issue.
Not sure this is the best approach, but I installed typescript as a dev dependency then it worked.

[shinGangan]

Hi @speechless2 , @mstflotfy !

I think this problem is specific to yarn, but what do you think?

I conducted experiments with pnpm and npm, but I could not confirm any similar problems.
However, a similar problem was confirmed when performing operational experiments with yarn.

Therefore, I don't think it's a yarn issue rather than a Nuxt ESLint issue.

[mstflotfy]

Hey @shinGangan,

I just installed the module using: npx nuxi module add eslint in a fresh bunand npm projects, and it worked without issues. It does seem that this problem is specific to yarn.

[shinGangan]

Hi @mstflotfy , thanks for your comment!
I'm glad the experiment results were the same. 💚

If there is a problem on yarn side, it may be okay to close this issue. 🤔

[shinGangan]

Hi @speechless2 , has the problem been resolved?
Or is it still happening?

[adamreisnz]

Still happening when using yarn

[antfu]

What's the yarn version you are having? Could anyone share a minimal reproduction with the yarn version and lockfile? Thanks

[adamreisnz]

I have used yarn 4.3.1. Here's steps to reproduce:

• Node 22.1.0
• npx nuxi@latest init eslint-issue
• cd eslint-issue
• rm -rf node_modules
• rm -yarn.lock
• yarn set version berry
• yarn config set nodeLinker node-modules
• npx nuxi module add eslint
• I added a couple more ESLint related dependencies:

Package.json

{
  "name": "nuxt-app",
  "private": true,
  "type": "module",
  "scripts": {
    "build": "nuxt build",
    "dev": "nuxt dev",
    "generate": "nuxt generate",
    "preview": "nuxt preview",
    "postinstall": "nuxt prepare"
  },
  "dependencies": {
    "@nuxt/eslint": "^0.3.13",
    "nuxt": "^3.12.2"
  },
  "devDependencies": {
    "@eslint/js": "^9.5.0",
    "eslint": "^9.5.0",
    "eslint-plugin-vue": "^9.26.0"
  },
  "packageManager": "[email protected]"
}

And then create this eslint.config.mjs file in your project root:

import js from '@eslint/js'
import vue from 'eslint-plugin-vue'
import withNuxt from './.nuxt/eslint.config.mjs'

export default withNuxt(
  js.configs.recommended,
  ...vue.configs['flat/recommended'],
  {
    ignores: [
      '*.ts',
      'node_modules',
      'public',
    ],
    languageOptions: {
      ecmaVersion: 'latest',
      sourceType: 'module',
    },
    rules: {
      //Because auto imports -.-
      'no-undef': 'off',
    },
  }
)

Run yarn (and note warning about ESLint version)

eslint is listed by your project with version 9.5.0 (p49b75), which doesn't satisfy what @nuxt/eslint and other dependencies request (^8.57.0).

Restart ESLint server in VSCode, and observe output:

Uncaught exception received.
Error: Cannot find module 'typescript'
Require stack:
- /eslint-issue/node_modules/@typescript-eslint/typescript-estree/dist/convert.js

Unfortunately I can't attach the yarn.lock file as it is too long. But the above steps are just a clean nuxt install and ESLint module addition.

Adding yarn add -D typescript and restarting ESLint server again fixes the issue and ESLint runs fine.

As I don't use TypeScript in the project at all, it's a bit strange that I have to explicitly add it to my package.json, and that there is no easy configuration option to simply disable it so I don't need to use all these related dependencies. How can we opt-out of Typescript?

Let me know if you need any further information.

[antfu]

@adamreisnz Thanks for the info - but I am sorry this is not a reproduction, it's better if you could create a temporary repo with all the files you have. See: https://antfu.me/posts/why-reproductions-are-required

[adamreisnz]

I will see what I can do

[adamreisnz]

Here you go @antfu , let me know if this works for you:

https://github.com/adamreisnz/nuxt-eslint-reproduction/tree/issue-437

[adamreisnz]

I've also put together a reproduction in #461 for the other issue I'm experiencing. In that branch you can see that the linter works once you manually add typescript to the package.json file

[adamreisnz]

Any update on no longer requiring TypeScript when using this module?

[adamreisnz]

Thank you @antfu !

[Revadike]

I'm still having this issue with v0.5.1. Even setting features.typescript explicitly to false does not fix it. The only way is to install typescript as dependency.

[antfu]

Set to false? Not true?

[Revadike]

Set to false? Not true?

We are not using typescript.

[Revadike]

@antfu
Here is the error:

[Error - 3:31:03 PM] Calculating config file for file:///home/myproject/eslint.config.js) failed.
Error: Cannot find module 'typescript'
Require stack:
- /home/myproject/node_modules/@typescript-eslint/typescript-estree/dist/convert.js
- /home/myproject/node_modules/@typescript-eslint/typescript-estree/dist/ast-converter.js
- /home/myproject/node_modules/@typescript-eslint/typescript-estree/dist/parser.js
- /home/myproject/node_modules/@typescript-eslint/typescript-estree/dist/index.js
- /home/myproject/node_modules/@typescript-eslint/parser/dist/parser.js
- /home/myproject/node_modules/@typescript-eslint/parser/dist/index.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1152:15)
    at Module._load (node:internal/modules/cjs/loader:993:27)
    at c._load (node:electron/js2c/node_init:2:13801)
    at Module.require (node:internal/modules/cjs/loader:1240:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (/home/myproject/node_modules/@typescript-eslint/typescript-estree/dist/convert.js:30:25)
    at Module._compile (node:internal/modules/cjs/loader:1373:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1432:10)
    at Module.load (node:internal/modules/cjs/loader:1215:32)
    at Module._load (node:internal/modules/cjs/loader:1031:12)

Our dev dependencies:

  "devDependencies": {
    "@date-io/dayjs": "^3.0.0",
    "@nuxt/devtools": "^1.0.6",
    "@nuxt/eslint": "^0.5.1",
    "@nuxt/types": "^2.17.2",
    "@nuxtjs/google-fonts": "^3.2.0",
    "dotenv": "^16.3.1",
    "eslint": "^9.9.0",
    "eslint-config-vuetify": "^1.0.0",
    "eslint-plugin-vue": "^9.27.0",
    "firebase-tools": "^13.0.1",
    "html-to-vue": "^1.4.0",
    "nuxt": "^3.8.2",
    "sass": "^1.69.5",
    "vite-plugin-vuetify": "^2.0.1",
    "vue": "^3.3.10",
    "vue-eslint-parser": "^9.4.0",
    "vue-router": "^4.2.5",
    "vuetify": "^3.4.7"
  },

Our eslint config:

import js from '@eslint/js'
import vue from 'eslint-plugin-vue'
import vuetify from 'eslint-config-vuetify'
import vueEslintParser from 'vue-eslint-parser'
import withNuxt from './.nuxt/eslint.config.mjs'

export default withNuxt(
  js.configs.recommended,
  ...vue.configs['flat/recommended'],
  {
    files: ['**/*.js', '**/*.vue'],
    languageOptions: {
      parser: vueEslintParser
    },
    ignores: ['dist/*'],
    plugins: { vue },
    rules: {
...

[antfu]

Please create a new issue with proper minimal reproduction. Thanks