.eslintrc.js

module.exports = {
  root: true,
  env: {
    es6: true,
    node: true
  },
  parserOptions: {
    parser: 'babel-eslint',
    ecmaVersion: 2018,
    sourceType: 'module'
  },
  extends: [
    'eslint:recommended'
  ],
  rules: {
    'array-bracket-newline': ['error', 'consistent'],
    'array-bracket-spacing': ['error', 'never'],
    'array-element-newline': ['error', 'consistent'],
    'arrow-spacing': 'error',
    'block-spacing': ['error', 'always'],
    'brace-style': ['error', '1tbs', { 'allowSingleLine': false }],
    'camelcase': ['error', { 'ignoreDestructuring': false }],
    'comma-dangle': ['error', 'never'],
    'comma-spacing': ['error', { 'before': false, 'after': true }],
    'comma-style': ['error', 'last'],
    'computed-property-spacing': ['error', 'never'],
    'eol-last': ['error', 'always'],
    'eqeqeq': ['error', 'always'],
    'func-call-spacing': ['error', 'never'],
    'func-style': ['error', 'declaration', { 'allowArrowFunctions': true }],
    'function-call-argument-newline': ['error', 'consistent'],
    'indent': ['error', 2, { 'SwitchCase': 1 }],
    'jsx-quotes': ['error', 'prefer-double'],
    'key-spacing': ['error', { 'afterColon': true }],
    'keyword-spacing': ['error', { 'before': true, 'after': true }],
    'linebreak-style': ['error', 'unix'],
    'max-len': ['error', { 'code': 120 }],
    'no-array-constructor': 'error',
    'no-bitwise': 'error',
    'no-debugger': 'error',
    'no-lonely-if': 'error',
    'no-mixed-operators': 'error',
    'no-multi-assign': 'error',
    'no-multiple-empty-lines': ['error', { 'max': 1 }],
    'no-negated-condition': 'error',
    'no-nested-ternary': 'error',
    'no-new-object': 'error',
    'no-plusplus': ['error', { 'allowForLoopAfterthoughts': true }],
    'no-tabs': 'error',
    'no-trailing-spaces': 'error',
    'no-underscore-dangle': 'error',
    'no-unneeded-ternary': 'error',
    'no-var': 'error',
    'no-whitespace-before-property': 'error',
    'nonblock-statement-body-position': ['error', 'beside'],
    'object-curly-newline': ['error', { 'consistent': true }],
    'object-curly-spacing': ['error', 'always'],
    'object-shorthand': ['error', 'always'],
    'padded-blocks': ['error', 'never'],
    'prefer-arrow-callback': 'error',
    'quotes': ['error', 'single'],
    'semi-spacing': ['error'],
    'semi-style': ['error', 'last'],
    'semi': ['error', 'always'],
    'space-before-blocks': ['error', 'always'],
    'space-before-function-paren': ['error', 'never'],
    'space-in-parens': ['error', 'never'],
    'space-infix-ops': ['error', { 'int32Hint': false }],
    'space-unary-ops': 'error',
    'spaced-comment': ['error', 'always'],
    'switch-colon-spacing': 'error'
  }
};