eslint-config-mapbox

Shared ESLint config for Mapbox engineering teams.

Quick start with Node.js

Install the following dev-dependencies:

npm install --save-dev \
  @mapbox/eslint-config-mapbox

Extend the @mapbox/eslint-config-mapbox config in your .eslintrc (or eslintConfig key in your package.json):

"eslintConfig": {
  "extends": "@mapbox/eslint-config-mapbox"
}

For TypeScript, prefer .eslint.js and use the snippet below:

'plugins': [
  '@typescript-eslint',
  'prettier'
],
'parserOptions': {
  'tsconfigRootDir': __dirname
},
'extends': [
  '@mapbox/eslint-config-mapbox/node20-typescript'
]

Specify the version of Node.js your project uses by setting .engines.node in your package.json, according to the settings you choose.
```
"engines": {
  "node": ">=20"
}
```

Run eslint on your project as part of your test and lint scripts:

"scripts": {
  "lint": "eslint --ignore-path .eslintignore --ext .js,.ts .",
  "test": "tape test/*.test.js && npm run lint",
}

Usage

The "Quick start" above exemplifies usage of this package with standard Node.js code.

Depending on the ECMAScript version of your code, whether you are using non-standard syntax like Flow and React's JSX, or other considerations, you may want to extend a variety of configurations provided by this package. eslint-config-mapbox exposes several configurations targeting specific ESLint plugins, each named after the plugin it targets.

To use each plugin-specific configuration, you'll need to do the following:

Install as dev-dependencies @mapbox/eslint-config-mapbox, eslint, and any plugins that are used by the configuration(s) you are extending, such as eslint-plugin-node or eslint-plugin-react.

Add the configuration(s) you are using to the "extends" array in your project's ESLint configuration, like this:

{
  "extends": [
    "@mapbox/eslint-config-mapbox/react",
    "@mapbox/eslint-config-mapbox/import",
    "@mapbox/eslint-config-mapbox/promise"
  ]
}

Plugin-specific configurations

@mapbox/eslint-config-mapbox/node
- Depends on eslint-plugin-node.
- For Node.js and CommonJS.
- Specify the version of Node.js your project uses by either setting .engines.node in your package.json, or by extending an LTS-version-specific ESLint configuration: node10, node12, node14, node14-typescript, node20, node20-typescript.
@mapbox/eslint-config-mapbox/react
- Depends on eslint-plugin-react.
- For React and JSX.
@mapbox/eslint-config-mapbox/import
- Depends on eslint-plugin-import.
- For ES2015 modules (import and export).
@mapbox/eslint-config-mapbox/promise
- Depends on eslint-plugin-promise.
- For Promises.
@mapbox/eslint-config-mapbox/xss
- Depends on eslint-plugin-xss.
- For avoiding potential XSS issues in front end JavaScript.
- Does not perform any JavaScript style linting if used on its own.

With Prettier

If you are using Prettier to format your JS, install eslint-config-prettier and add it at the end of your "extends" array. It will turn off all ESLint rules related to the code-style preferences that Prettier already addresses.