Cannot Lint my TypeScript project using @typescript-eslint/eslint-plugin and eslint.config.js flat config

Cannot Lint my TypeScript project using @typescript-eslint/eslint-plugin and eslint.config.js flat config

If you are facing issues while trying to lint your TypeScript project using the @typescript-eslint/eslint-plugin and a flat configuration file (eslint.config.js), you’re not alone. This problem can be frustrating, but fortunately, there are a few solutions you can try to resolve it.

Solution 1: Use a .eslintrc.js Configuration File

One solution is to switch from using a flat configuration file to using a .eslintrc.js configuration file. This file allows you to write JavaScript code to configure ESLint, which can be helpful when working with TypeScript projects.

Here’s an example of how you can set up your .eslintrc.js file to lint your TypeScript project:

// .eslintrc.js
module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint'],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended'
  ],
  rules: {
    // Add your custom rules here
  }
};

Make sure to install the required dependencies by running the following command:

npm install eslint @typescript-eslint/parser @typescript-eslint/eslint-plugin --save-dev

Solution 2: Use a Different Configuration File Format

If you prefer to stick with the flat configuration file format, you can try using a different file extension such as .eslintrc.json or .eslintrc.yaml. Sometimes, changing the file format can resolve the linting issues.

Here’s an example of how you can set up your .eslintrc.json file to lint your TypeScript project:

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "rules": {
    // Add your custom rules here
  }
}

Remember to install the necessary dependencies by running the following command:

npm install eslint @typescript-eslint/parser @typescript-eslint/eslint-plugin --save-dev

Conclusion

Linting your TypeScript project using the @typescript-eslint/eslint-plugin and a flat configuration file can sometimes be challenging. However, by following the solutions mentioned above, you should be able to overcome this issue and ensure your codebase adheres to the desired linting rules.

Remember to choose the solution that best fits your preferences and project requirements. Happy linting!