Lint your code just like I do.

I'm sort of particular when it comes to ESLint configs. I mostly like Standard, but appreciate the power of Prettier when it comes to formatting.

This also includes some great plugins that don't come standard with Standard, such as for React and Jest.

The default config is for regular TypeScript packages. There's also a React-specific config available.

yarn add --dev @xavdid/eslint-config

You'll also need to make sure typescript and eslint are available.

When used, your .eslintrc.js should be something like:

module.exports = {
  root: true,
  // don't lint this file
  // https://typescript-eslint.io/linting/troubleshooting#i-get-errors-telling-me-eslint-was-configured-to-run--however-that-tsconfig-does-not--none-of-those-tsconfigs-include-this-file
  ignorePatterns: [".eslintrc.js"],
  extends: "@xavdid",
  parserOptions: {
    project: `${__dirname}/tsconfig.json`,
  },
  rules: {
    // disable rules individually as needed
    // "@typescript-eslint/explicit-function-return-type": 0,
  },
};

For the React-specific config, use:

module.exports = {
  root: true,
  // don't lint this file
  // https://typescript-eslint.io/linting/troubleshooting#i-get-errors-telling-me-eslint-was-configured-to-run--however-that-tsconfig-does-not--none-of-those-tsconfigs-include-this-file
  ignorePatterns: [".eslintrc.js"],
  extends: "@xavdid/eslint-config/react",
  parserOptions: {
    project: `${__dirname}/tsconfig.json`,
  },
  rules: {
    // disable rules individually as needed
    // "@typescript-eslint/explicit-function-return-type": 0,
  },
};

Note the longer extends value, based on the rules described in this doc.

There are configuration changes coming in eslint@9, detailed here. On 2023-08-20, it had a callout:

We are transitioning to a new config system in ESLint v9.0.0. The config system shared on this page is currently the default but will be deprecated in v9.0.0. You can opt-in to the new config system by following the instructions in the documentation.

There's a 3-part series explaining how it works:

1. https://eslint.org/blog/2022/08/new-config-system-part-1/
2. https://eslint.org/blog/2022/08/new-config-system-part-2/
3. https://eslint.org/blog/2022/08/new-config-system-part-3/

Those changes will likely change (and improve) the way this configuration works and will require some major changes.