After incorporating all the suggested guidelines from the eslint documentation into my .eslintrc.js file, I encountered numerous instances of the error message 'Rule definition was not found'

In my .eslintrc.js file, I have configured the following settings:

module.exports = {
    parser: '@typescript-eslint/parser',
    parserOptions: {
        project: 'tsconfig.json',
        sourceType: 'module'
    },
    plugins: ['@typescript-eslint/eslint-plugin'],
    extends: [
        'eslint:recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:prettier/recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking'
    ],
    root: true,
    env: {
        node: true,
        jest: true
    },
    ignorePatterns: ['.eslintrc.js'],
    rules: {
        // List of error rules specified here
    }
};

Contents of my package.json file:

...
  "scripts": {
    "lint": "eslint \"{src,libs}/**/*.ts\" --fix",
    "lint:ci": "eslint \"{src,libs}/**/*.ts\"",
...
  "devDependencies": {
    "@typescript-eslint/eslint-plugin": "5.12.1",
    "@typescript-eslint/parser": "5.12.1",
    ...

List of errors encountered:

 // List of errors listed here

I'm unsure of what else needs to be included in my configuration to get eslint to work properly with the recommended rules. It seems like I'm just experimenting randomly based on the documentation in an attempt to resolve these errors.

Answer №1

ESLint is throwing an error because it believes the TypeScript rule is missing.

Even though your package.json has the correct version for both @typescript-eslint/eslint-plugin and @typescript-eslint/parser, make sure that your project is actually using the right version.

Execute the following commands:

npm ls @typescript-eslint/eslint-plugin
npm ls @typescript-eslint/parser

If they are not both 5.12.1, attempt to update them to that version.

npm install --save-dev @typescript-eslint/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="294c5a4540475d0459455c4e4047691c07181b0718">[email protected]</a>
npm install --save-dev @typescript-eslint/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="1363726160766153263d22213d22">[email protected]</a>

Please note: As per the author's instructions, if you have ESLint installed globally, then also globally install @typescript-eslint/eslint-plugin (use -g instead of --save-dev).

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