eslint-plugin-zillow

Zillow's ESLint config bundled into a "zero-conf" plugin

Why

We want shareable configs to have as low of an overhead as possible. Users shouldn't have to know exactly what plugins are required by the config, install them and manage their versions manually. This plugin exposes eslint-config-zillow for reuse, with plugins automatically installed.

See https://github.com/eslint/eslint/issues/3458 for further discussion on this topic. Approach inspired by eslint-plugin-react-app and eslint-plugin-springload.

Usage

Install the plugin and its minimal peer dependencies:

npm i -D eslint prettier eslint-plugin-zillow

Configure ESLint to use this config. For example, in your package.json, this would be:

  "eslintConfig": {
    "extends": "plugin:zillow/recommended"
  },

Jest

Jest-specific rules and environment added to the default export.

  "eslintConfig": {
    "extends": ["plugin:zillow/recommended", "plugin:zillow/jest"]
  },

Mocha

Mocha-specific rules and environment added to the default export.

  "eslintConfig": {
    "extends": ["plugin:zillow/recommended", "plugin:zillow/mocha"]
  },

TypeScript

Enable TypeScript-specific linting rules.

  "eslintConfig": {
    "extends": ["plugin:zillow/recommended", "plugin:zillow/typescript"]
  },

This config expects your tsconfig.json to be in the current working directory (relative to your eslint config), which is extremely common. If it is elsewhere (say, a monorepo leaf), you will need to override various parserOptions:

// .eslintrc.js
module.exports = {
  extends: ['plugin:zillow/recommended', 'plugin:zillow/typescript'],
  overrides: [
    {
      test: '**/*.ts?(x)',
      parserOptions: {
        tsconfigRootDir: __dirname,
        project: ['./tsconfig.eslint.json', './packages/*/tsconfig.json'],
      },
    },
  ],
};

Customizing Rules

You can configure the rules like every other eslint plugin. Just keep in mind that if you want to change a rule of an included plugin (for example, eslint-plugin-react) you must prefix the rule with zillow/ (necessary to prevent namespace collisions).

For example:

{
  "extends": [
    "plugin:zillow/recommended"
  ],
  "rules": {
    "zillow/react/react-in-jsx-scope": ["warn"]
  }
}

prettier Editor Plugin Integration

Unfortunately, super-useful editor plugins like prettier-atom and prettier-vscode do not load Prettier settings from ESLint config, which is where we load our Prettier options from. To workaround this, add a .prettierrc.js or prettier.config.js file to your root with the following content:

module.exports = require('prettier-config-zillow');

"Bundled" Plugins

We currently encapsulate the following plugins:

• eslint-plugin-import
• eslint-plugin-jest
• eslint-plugin-jsx-a11y
• eslint-plugin-mocha
• eslint-plugin-prettier
• eslint-plugin-react
• eslint-plugin-react-hooks
• @typescript-eslint/eslint-plugin