Error message in Node.js: Configuration file not found for eslint

I've been working on setting up TypeScript and ESLint for my new Node.js Express app, but I keep encountering the

Error: Could not find config file.

Here's a glimpse of my package.json:

{
  //#######
  //#######
  "scripts": {},
  "dependencies": {
    "express": "^4.19.2"
  },
  "devDependencies": {
    "@types/express": "^4.17.21",
    "@types/node": "^20.12.13",
    "@typescript-eslint/eslint-plugin": "^7.11.0",
    "@typescript-eslint/parser": "^7.11.0",
    "eslint": "^9.3.0",
    "eslint-plugin-node": "^11.1.0",
    "ts-node": "^10.9.2",
    "typescript": "^5.4.5"
  }
}

Furthermore, here is the content of my tsconfig.json file:

{
  "compilerOptions": {
    "target": "ES6",
    "module": "commonjs",
    "rootDir": "./src",
    "moduleResolution": "Node",
    "resolveJsonModule": true,
    "outDir": "./dist",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "strict": true,
    "noImplicitAny": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "skipLibCheck": true
  },
  "include": ["src/**/*", ".eslintrc.js"],
  "exclude": ["node_modules"]
}

As for my eslintrc.js file, it looks like this:

module.exports = {
  env: {
    node: true,
    commonjs: true,
    es6: true,
  },
  root: true,
  extends: [
    'eslint:recommended',
    'plugin:node/recommended',
    'plugin:@typescript-eslint/recommended',
  ],
  parser: '@typescript-eslint/parser',
  ignorePatterns: ['.eslintrc.js', 'node_modules'],
  parserOptions: {
    project: 'tsconfig.json',
    tsconfigRootDir: __dirname,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint', '@typescript-eslint/eslint-plugin'],
  rules: {
    '@typescript-eslint/interface-name-prefix': 'warn',
    '@typescript-eslint/no-unused-vars': 'error',
    '@typescript-eslint/no-explicit-any': 'error',
  },
};

I have attempted to make modifications in the eslintrc file by adding and removing lines, but the issue persists. The TypeScript server is running smoothly, however, I can't seem to pinpoint what exactly is causing the problem.

If anyone could offer some assistance, I would greatly appreciate it!

Answer №1

I faced a similar issue with the following steps:

  • Setting up a NestJs project
  • Creating an eslintrc.js file
  • Configuring a tsconfig.json file
  • Using eslint version 9.0.0 in my case (in your case it was 9.3.0)

Upon running the command

eslint "{src,apps,libs,test}/**/*.ts" --fix
, I encountered the error message:

ESLint couldn't find an eslint.config.(js|mjs|cjs) file.

Starting from ESLint v9.0.0, the default configuration file is now eslint.config.js. If you are using a .eslintrc* file, please refer to the migration guide to update your configuration file to the new format:

https://eslint.org/docs/latest/use/configure/migration-guide

Solution

Following the instructions in the migration guide, I executed the command

npx @eslint/migrate-config .eslintrc.js
which:

  1. Installed @eslint/migrate-config if not already installed
  2. Generated eslint.config.mjs file based on your existing .eslintrc.js (ensure correct conversion)
  3. Now run
    eslint "{src,apps,libs,test}/**/*.ts" --fix
    or restart ESLint in your IDE to resolve the issue

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