.eslintrc.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 */

const OFF = 0;
const WARNING = 1;
const ERROR = 2;

module.exports = {
  root: true,
  env: {
    browser: true,
    commonjs: true,
    jest: true,
    node: true,
  },
  parser: '@babel/eslint-parser',
  parserOptions: {
    allowImportExportEverywhere: true,
  },
  extends: ['airbnb', 'prettier'],
  plugins: ['react-hooks', 'header'],
  rules: {
    // Ignore certain webpack alias because it can't be resolved
    'import/no-unresolved': [
      ERROR,
      {ignore: ['^@theme', '^@docusaurus', '^@generated']},
    ],
    'import/extensions': OFF,
    'header/header': [
      ERROR,
      'block',

      [
        '*',
        ' * Copyright (c) Facebook, Inc. and its affiliates.',
        ' *',
        ' * This source code is licensed under the MIT license found in the',
        ' * LICENSE file in the root directory of this source tree.',
        ' *',
        // Unfortunately eslint-plugin-header doesn't support optional lines.
        // If you want to enforce your website JS files to have @flow or @format,
        // modify these lines accordingly.
        {
          pattern: '.* @format',
        },
        ' ',
      ],
    ],
    'react/jsx-filename-extension': OFF,
    'react-hooks/rules-of-hooks': ERROR,
    'react/prop-types': OFF, // PropTypes aren't used much these days.
    'react/function-component-definition': [
      WARNING,
      {
        namedComponents: 'function-declaration',
        unnamedComponents: 'arrow-function',
      },
    ],
  },
};