.eslintrc.js

module.exports = {
  root: true,
  env: { node: true },
  extends: [
    'plugin:vue/essential',
    'plugin:vue/recommended',
    '@vue/standard',
  ],
  parserOptions: { parser: 'babel-eslint' },
  rules: {
    'accessor-pairs': 'error',
    'array-bracket-newline': [ 'error', { multiline: true } ],
    'array-bracket-spacing': [ 'error', 'always' ],
    'array-callback-return': 'error',
    'arrow-body-style': [ 'error', 'as-needed' ],
    'arrow-spacing': 'error',
    'block-spacing': [ 'error', 'always' ],
    'brace-style': [ 'error', '1tbs', { allowSingleLine: true } ],
    'callback-return': 'error',
    camelcase: [ 'error', { properties: 'always' } ],
    'comma-dangle': [ 'error', 'always-multiline' ],
    'comma-spacing': 'error',
    'comma-style': [ 'error', 'last' ],
    'consistent-return': 'error',
    'constructor-super': 'error',
    'dot-location': [ 'error', 'object' ],
    'dot-notation': 'error',
    'eol-last': 'error',
    eqeqeq: [ 'error', 'always' ],
    'handle-callback-err': 'error',
    indent: [ 'error', 2, { SwitchCase: 1 } ],
    'key-spacing': [
      'error', {
        beforeColon: false,
        afterColon: true,
      },
    ],
    'keyword-spacing': 'error',
    'max-params': [ 'error', 5 ],
    'new-cap': 'error',
    'newline-per-chained-call': 'error',
    'no-caller': 'error',
    'no-case-declarations': 'error',
    'no-class-assign': 'error',
    'no-cond-assign': [ 'error', 'except-parens' ],
    'no-confusing-arrow': 'error',
    'no-const-assign': 'error',
    'no-constant-condition': 'error',
    'no-delete-var': 'error',
    'no-dupe-args': 'error',
    'no-dupe-class-members': 'error',
    'no-dupe-keys': 'error',
    'no-else-return': 'error',
    'no-empty': [ 'error', { allowEmptyCatch: true } ],
    'no-empty-character-class': 'error',
    'no-empty-pattern': 'error',
    'no-eq-null': 'error',
    'no-eval': 'error',
    'no-ex-assign': 'error',
    'no-extra-bind': 'error',
    'no-extra-boolean-cast': 'error',
    'no-extra-parens': 'error',
    'no-extra-semi': 'error',
    'no-fallthrough': 'error',
    'no-floating-decimal': 'error',
    'no-implicit-coercion': 'error',
    'no-implicit-globals': 'error',
    'no-implied-eval': 'error',
    'no-invalid-regexp': 'error',
    'no-invalid-this': 'error',
    'no-irregular-whitespace': 'error',
    'no-labels': 'error',
    'no-lone-blocks': 'error',
    'no-lonely-if': 'error',
    'no-mixed-requires': 'error',
    'no-multi-spaces': 'error',
    'no-multi-str': 'error',
    'no-multiple-empty-lines': [ 'error', { max: 1 } ],
    'no-native-reassign': [ 'error', { exceptions: [ 'Object' ] } ],
    'no-negated-in-lhs': 'error',
    'no-new': 'error',
    'no-new-func': 'error',
    'no-new-require': 'error',
    'no-new-symbol': 'error',
    'no-new-wrappers': 'error',
    'no-obj-calls': 'error',
    'no-octal-escape': 'error',
    'no-path-concat': 'error',
    'no-proto': 'error',
    'no-redeclare': 'error',
    'no-regex-spaces': 'error',
    'no-return-assign': 'error',
    'no-self-assign': 'error',
    'no-self-compare': 'error',
    'no-sequences': 'error',
    'no-shadow': [ 'error', { allow: [ 'body', 'error', 'reject', 'resolve', 'response', 'result' ] } ],
    'no-shadow-restricted-names': 'error',
    'no-spaced-func': 'error',
    'no-sparse-arrays': 'error',
    'no-this-before-super': 'error',
    'no-throw-literal': 'error',
    'no-trailing-spaces': 'error',
    'no-undef': 'error',
    'no-unexpected-multiline': 'error',
    'no-unmodified-loop-condition': 'error',
    'no-unneeded-ternary': 'error',
    'no-unreachable': 'error',
    'no-unused-expressions': 'error',
    'no-unused-vars': 'error',
    'no-use-before-define': [ 'error', 'nofunc' ],
    'no-useless-call': 'error',
    'no-useless-concat': 'error',
    'no-useless-constructor': 'error',
    'no-useless-escape': 'error',
    'no-useless-return': 'error',
    'no-var': 'error',
    'no-void': 'error',
    'no-warning-comments': [
      'error', {
        terms: [ 'todo', 'fixme', 'hack' ],
        location: 'anywhere',
      },
    ],
    'no-with': 'error',
    'object-curly-newline': [
      'error', {
        ObjectExpression: {
          multiline: true, minProperties: 2,
        },
        ObjectPattern: { minProperties: 3 },
        ImportDeclaration: { minProperties: 3 },
        ExportDeclaration: {
          multiline: true, minProperties: 3,
        },
      },
    ],
    'object-curly-spacing': [ 'error', 'always' ],
    'object-property-newline': 'error',
    'object-shorthand': 'error',
    'one-var': [ 'error', 'never' ],
    'one-var-declaration-per-line': 'error',
    'operator-linebreak': [ 'error', 'after' ],
    'padded-blocks': [ 'error', 'never' ],
    'prefer-arrow-callback': 'error',
    'prefer-const': 'error',
    'prefer-promise-reject-errors': 'error',
    'prefer-rest-params': 'error',
    'prefer-spread': 'error',
    'prefer-template': 'error',
    quotes: [ 'error', 'single', { avoidEscape: true } ],
    radix: [ 'error', 'always' ],
    'require-yield': 'error',
    semi: [ 'error', 'always' ],
    'spaced-comment': [ 'error', 'always', { exceptions: [ '/' ] } ],
    'space-before-blocks': 'error',
    'space-before-function-paren': [
      'error', {
        anonymous: 'ignore', named: 'always',
      },
    ],
    'space-infix-ops': 'error',
    strict: 'error',
    'template-curly-spacing': [ 'error', 'always' ],
    'use-isnan': 'error',
    'valid-typeof': 'error',
    'vue/no-v-html': 'off',
    'yield-star-spacing': [ 'error', 'before' ],
    yoda: 'error',
  },
};