.eslintrc.js

module.exports = {
  env: {
    es6: true,
    node: true,
  },
  extends: ['eslint:recommended', 'plugin:prettier/recommended'],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
    },
  },
  rules: {
    indent: ['error', 2, { SwitchCase: 1 }],
    'linebreak-style': ['error', 'unix'],
  },
  overrides: [
    {
      files: ['./src/gatsby-browser.js', './src/loader/*'],
      env: {
        browser: true,
      },
    },
    {
      files: ['**/cypress/**/*'],
      env: {
        'cypress/globals': true,
      },
      plugins: ['cypress'],
    },
    {
      files: ['e2e-tests/*/src/**/*'],
      extends: ['plugin:react/recommended'],
      rules: {
        'react/prop-types': 0,
      },
      settings: {
        react: {
          version: '16.9.0',
        },
      },
    },
  ],
};