.eslintrc.js

module.exports = {
  env: {
    browser: true,
    commonjs: true,
    es6: true,
    node: true,
  },
  extends: 'eslint:recommended',
  parser: 'babel-eslint',
  parserOptions: {
    sourceType: 'module',
    ecmaVersion: 2018,
    ecmaFeatures: {
      jsx: true,
    },
  },
  plugins: ['react'],
  rules: {
    indent: ['error', 2],
    'linebreak-style': ['error', 'unix'],
    quotes: ['error', 'single', { allowTemplateLiterals: true }],
    semi: ['error', 'always'],
    'react/jsx-uses-vars': 1,
    'react/jsx-uses-react': 1,
  },
};