.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  extends: [
    'eslint:recommended',
    'plugin:react/recommended',
    'plugin:jsx-a11y/recommended',
    'plugin:@typescript-eslint/recommended',
    'prettier',
    'prettier/@typescript-eslint',
    'prettier/react',
    'plugin:prettier/recommended',
    'standard',
  ],
  plugins: ['@typescript-eslint', 'react', 'jsx-a11y', 'react-hooks', 'graphql'],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
    },
  },
  settings: {
    react: {
      version: 'detect',
    },
  },
  env: {
    browser: true,
  },
  rules: {
    'react/prop-types': 'off', // Disable prop-types as we use TypeScript for type checking
    '@typescript-eslint/explicit-function-return-type': 'off',
    'space-before-function-paren': 0,
    'react-hooks/rules-of-hooks': 'error', // Checks rules of Hooks
    'react-hooks/exhaustive-deps': 'warn', // Checks effect dependencies
    'comma-dangle': [
      'error',
      {
        arrays: 'only-multiline',
        objects: 'only-multiline',
        imports: 'only-multiline',
        exports: 'only-multiline',
        functions: 'only-multiline',
      },
    ],
    'max-len': ['error', { code: 120, ignoreStrings: true, ignoreUrls: true }],
    'import/prefer-default-export': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/indent': 'off',
    'react/no-unescaped-entities': [
      'error',
      {
        forbid: [
          { char: '>', alternatives: ['>'] },
          { char: '}', alternatives: ['}'] },
        ],
      },
    ],

    // from: https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby/src/utils/eslint-config.ts
    'import/no-webpack-loader-syntax': [0],
    // https://github.com/evcohen/eslint-plugin-jsx-a11y/tree/master/docs/rules
    'jsx-a11y/accessible-emoji': 'warn',
    'jsx-a11y/alt-text': 'warn',
    'jsx-a11y/anchor-has-content': 'warn',
    'jsx-a11y/anchor-is-valid': 'warn',
    'jsx-a11y/aria-activedescendant-has-tabindex': 'warn',
    'jsx-a11y/aria-props': 'warn',
    'jsx-a11y/aria-proptypes': 'warn',
    'jsx-a11y/aria-role': 'warn',
    'jsx-a11y/aria-unsupported-elements': 'warn',
    // TODO: It looks like the "autocomplete-valid" rule hasn't been published yet
    // "jsx-a11y/autocomplete-valid": [
    //   "warn",
    //   {
    //     inputComponents: [],
    //   },
    // ],
    'jsx-a11y/click-events-have-key-events': 'warn',
    'jsx-a11y/heading-has-content': 'warn',
    'jsx-a11y/html-has-lang': 'warn',
    'jsx-a11y/iframe-has-title': 'warn',
    'jsx-a11y/img-redundant-alt': 'warn',
    'jsx-a11y/interactive-supports-focus': 'warn',
    'jsx-a11y/label-has-associated-control': 'warn',
    'jsx-a11y/lang': 'warn',
    'jsx-a11y/media-has-caption': 'warn',
    'jsx-a11y/mouse-events-have-key-events': 'warn',
    'jsx-a11y/no-access-key': 'warn',
    'jsx-a11y/no-autofocus': 'warn',
    'jsx-a11y/no-distracting-elements': 'warn',
    'jsx-a11y/no-interactive-element-to-noninteractive-role': 'warn',
    'jsx-a11y/no-noninteractive-element-interactions': 'warn',
    'jsx-a11y/no-noninteractive-element-to-interactive-role': 'warn',
    'jsx-a11y/no-noninteractive-tabindex': 'warn',
    'jsx-a11y/no-onchange': 'warn',
    'jsx-a11y/no-redundant-roles': 'warn',
    'jsx-a11y/no-static-element-interactions': 'warn',
    'jsx-a11y/role-has-required-aria-props': 'warn',
    'jsx-a11y/role-supports-aria-props': 'warn',
    'jsx-a11y/scope': 'warn',
    'jsx-a11y/tabindex-no-positive': 'warn',
  },
  overrides: [
    // Override some TypeScript rules just for .js files
    {
      files: ['*.js'],
      rules: {
        '@typescript-eslint/no-var-requires': 'off', //
      },
    },
  ],
}