.eslintrc.js

module.exports = {
    plugins: ['prettier'],
    extends: ['eslint:recommended', 'prettier'],
    parser: '@babel/eslint-parser',
    parserOptions: {
      ecmaVersion: 11,
      requireConfigFile: false,
      sourceType: 'module',
      ecmaFeatures: {
        jsx: true
      }
    },
    env: {
      es6: true,
      browser: true,
      node: true,
      jest: true
    },
    rules: {
      'no-debugger': 2,
      'no-alert': 2,
      'no-await-in-loop': 0,
      'no-prototype-builtins': 0,
      'no-return-assign': ['error', 'except-parens'],
      'no-restricted-syntax': [
        2,
        'ForInStatement',
        'LabeledStatement',
        'WithStatement'
      ],
      'no-unused-vars': [
        0,
        {
          ignoreSiblings: true,
          argsIgnorePattern: 'React|res|next|^_'
        }
      ],
      'prefer-const': [
        'error',
        {
          destructuring: 'all'
        }
      ],
      'no-unused-expressions': [
        2,
        {
          allowTaggedTemplates: true
        }
      ],
      'no-console': 1,
      'comma-dangle': 2,
      'jsx-quotes': [2, 'prefer-double'],
      'linebreak-style': ['error', 'unix'],
      quotes: [
        2,
        'single',
        {
          avoidEscape: true,
          allowTemplateLiterals: true
        }
      ],
      'prettier/prettier': [
        'error',
        {
          trailingComma: 'none',
          singleQuote: true,
          printWidth: 80
        }
      ]
    }
  };