ESLint config for server-side (no plugins, clear rules)

.eslintrc.js

'use strict';

const OFF = 0;
const WARN = 1;
const DANGER = 2;

const ALWAYS = 'always';
const NEVER = 'never';
const TAB = 2;

module.exports = {
  env: {
    es6: true,
    node: true
  },
  extends: 'eslint:recommended',
  rules: {
    // Fix or warning
    'sort-keys': OFF,
    'sort-vars': OFF,
    'no-console': OFF,
    'max-classes-per-file': OFF,
    'padded-blocks': [
      WARN, {
        blocks: NEVER,
        classes: NEVER, switches: NEVER
      }
    ],
    'one-var': [ WARN, NEVER ],
    'one-var-declaration-per-line': OFF,
    'lines-around-comment': [
      WARN, {
        beforeBlockComment: true, beforeLineComment: true,
        allowBlockStart: true, allowObjectStart: true,
        allowArrayStart: true, allowClassStart: true,
        afterBlockComment: false, afterLineComment: false
      }
    ],
    'lines-around-directive': [ WARN, { before: NEVER, after: ALWAYS } ],
    'no-multiple-empty-lines': [ WARN, { max: 1 } ],
    indent: [ WARN, TAB ],
    'indent-legacy': [ WARN, TAB ],
    'prefer-const': OFF,
    'quote-props': [ WARN, 'as-needed' ],
    quotes: [ WARN, 'single' ],
    'object-curly-spacing': [ WARN, ALWAYS ],
    'object-property-newline': OFF,
    'array-element-newline': [ WARN, ALWAYS ],
    'line-comment-position': [ WARN, { position: 'above' } ],
    'no-misleading-character-class': OFF,
    'no-useless-catch': OFF,
    'prefer-arrow-callback': OFF,
    'prefer-destructuring': OFF,
    'prefer-named-capture-group': OFF,
    'prefer-numeric-literals': OFF,
    'prefer-object-spread': OFF,
    'prefer-promise-reject-errors': OFF,
    'prefer-reflect': OFF,
    'prefer-rest-params': OFF,
    'prefer-spread': OFF,
    'prefer-template': OFF,
    'max-lines-per-function': OFF,
    'no-async-promise-executor': OFF,
    'require-atomic-updates': OFF,
    'require-await': OFF,
    'require-jsdoc': OFF,
    'valid-jsdoc': OFF,
    'require-unicode-regexp': OFF,
    'require-yield': OFF,
    'max-len': WARN,
    'array-bracket-spacing': [ WARN, ALWAYS ],
    'dot-location': [ WARN, 'property' ],
    'dot-notation': WARN,
    'comma-spacing': WARN,
    'newline-after-var': WARN,
    'lines-between-class-members': WARN,
    'no-trailing-spaces': WARN,
    'newline-before-return': OFF,
    'arrow-parens': [WARN, "as-needed"],
    semi: WARN,
    'no-unneeded-ternary': [WARN, {defaultAssignment: true}],
    'no-ternary': OFF,
    'multiline-ternary': [WARN, "always-multiline"],
    'new-cap': [WARN, { "capIsNew": false }],
    'no-negated-condition': OFF,
    'no-magic-numbers': WARN,
    'no-undefined': WARN,
    'global-require': WARN,
    'callback-return': OFF,
    'no-unused-expressions': OFF,
    'no-nested-ternary': OFF,
    'no-underscore-dangle': WARN,

    // Others is dangeres
    'space-before-blocks': DANGER,
    'space-before-function-paren': DANGER,
    'key-spacing': DANGER,
    'keyword-spacing': DANGER,
    'accessor-pairs': DANGER,
    'array-bracket-newline': DANGER,
    'array-callback-return': DANGER,
    'arrow-body-style': DANGER,
    'arrow-spacing': DANGER,
    'block-scoped-var': DANGER,
    'block-spacing': DANGER,
    'brace-style': DANGER,
    camelcase: DANGER,
    'capitalized-comments': DANGER,
    'class-methods-use-this': DANGER,
    'comma-dangle': DANGER,
    'comma-style': DANGER,
    complexity: DANGER,
    'computed-property-spacing': DANGER,
    'consistent-return': DANGER,
    'consistent-this': DANGER,
    'constructor-super': DANGER,
    curly: DANGER,
    'default-case': DANGER,
    'eol-last': DANGER,
    eqeqeq: DANGER,
    'for-direction': DANGER,
    'func-call-spacing': DANGER,
    'func-name-matching': DANGER,
    'func-names': DANGER,
    'func-style': DANGER,
    'function-paren-newline': DANGER,
    'generator-star-spacing': DANGER,
    'getter-return': DANGER,
    'guard-for-in': DANGER,
    'handle-callback-err': DANGER,
    'id-blacklist': DANGER,
    'id-length': DANGER,
    'id-match': DANGER,
    'implicit-arrow-linebreak': DANGER,
    'init-declarations': DANGER,
    'jsx-quotes': DANGER,
    'linebreak-style': DANGER,
    'max-depth': DANGER,
    'max-lines': DANGER,
    'max-nested-callbacks': DANGER,
    'max-params': DANGER,
    'max-statements': DANGER,
    'max-statements-per-line': DANGER,
    'multiline-comment-style': DANGER,
    'new-parens': DANGER,
    'newline-per-chained-call': DANGER,
    'no-alert': DANGER,
    'no-array-constructor': DANGER,
    'no-await-in-loop': DANGER,
    'no-bitwise': DANGER,
    'no-buffer-constructor': DANGER,
    'no-caller': DANGER,
    'no-case-declarations': DANGER,
    'no-catch-shadow': DANGER,
    'no-class-assign': DANGER,
    'no-compare-neg-zero': DANGER,
    'no-cond-assign': DANGER,
    'no-confusing-arrow': DANGER,
    'no-const-assign': DANGER,
    'no-constant-condition': DANGER,
    'no-continue': DANGER,
    'no-control-regex': DANGER,
    'no-debugger': DANGER,
    'no-delete-var': DANGER,
    'no-div-regex': DANGER,
    'no-dupe-args': DANGER,
    'no-dupe-class-members': DANGER,
    'no-dupe-keys': DANGER,
    'no-duplicate-case': DANGER,
    'no-duplicate-imports': DANGER,
    'no-else-return': DANGER,
    'no-empty': DANGER,
    'no-empty-character-class': DANGER,
    'no-empty-function': DANGER,
    'no-empty-pattern': DANGER,
    'no-eq-null': DANGER,
    'no-eval': DANGER,
    'no-ex-assign': DANGER,
    'no-extend-native': DANGER,
    'no-extra-bind': DANGER,
    'no-extra-boolean-cast': DANGER,
    'no-extra-label': DANGER,
    'no-extra-parens': DANGER,
    'no-extra-semi': DANGER,
    'no-fallthrough': DANGER,
    'no-floating-decimal': DANGER,
    'no-func-assign': DANGER,
    'no-global-assign': DANGER,
    'no-implicit-coercion': DANGER,
    'no-implicit-globals': DANGER,
    'no-implied-eval': DANGER,
    'no-inline-comments': DANGER,
    'no-inner-declarations': DANGER,
    'no-invalid-regexp': DANGER,
    'no-invalid-this': DANGER,
    'no-irregular-whitespace': DANGER,
    'no-iterator': DANGER,
    'no-label-var': DANGER,
    'no-labels': DANGER,
    'no-lone-blocks': DANGER,
    'no-lonely-if': DANGER,
    'no-loop-func': DANGER,
    'no-mixed-operators': DANGER,
    'no-mixed-requires': DANGER,
    'no-mixed-spaces-and-tabs': DANGER,
    'no-multi-assign': DANGER,
    'no-multi-spaces': DANGER,
    'no-multi-str': DANGER,
    'no-native-reassign': DANGER,
    'no-negated-in-lhs': DANGER,
    'no-new': DANGER,
    'no-new-func': DANGER,
    'no-new-object': DANGER,
    'no-new-require': DANGER,
    'no-new-symbol': DANGER,
    'no-new-wrappers': DANGER,
    'no-obj-calls': DANGER,
    'no-octal': DANGER,
    'no-octal-escape': DANGER,
    'no-param-reassign': DANGER,
    'no-path-concat': DANGER,
    'no-plusplus': DANGER,
    'no-process-env': DANGER,
    'no-process-exit': DANGER,
    'no-proto': DANGER,
    'no-prototype-builtins': DANGER,
    'no-redeclare': DANGER,
    'no-regex-spaces': DANGER,
    'no-restricted-globals': DANGER,
    'no-restricted-imports': DANGER,
    'no-restricted-modules': DANGER,
    'no-restricted-properties': DANGER,
    'no-restricted-syntax': DANGER,
    'no-return-assign': DANGER,
    'no-return-await': DANGER,
    'no-script-url': DANGER,
    'no-self-assign': DANGER,
    'no-self-compare': DANGER,
    'no-sequences': DANGER,
    'no-shadow': DANGER,
    'no-shadow-restricted-names': DANGER,
    'no-spaced-func': DANGER,
    'no-sparse-arrays': DANGER,
    'no-sync': DANGER,
    'no-tabs': DANGER,
    'no-template-curly-in-string': DANGER,
    'no-this-before-super': DANGER,
    'no-throw-literal': DANGER,
    'no-undef': DANGER,
    'no-undef-init': DANGER,
    'no-unexpected-multiline': DANGER,
    'no-unmodified-loop-condition': DANGER,
    'no-unreachable': DANGER,
    'no-unsafe-finally': DANGER,
    'no-unsafe-negation': DANGER,
    'no-unused-labels': DANGER,
    'no-unused-vars': DANGER,
    'no-use-before-define': DANGER,
    'no-useless-call': DANGER,
    'no-useless-computed-key': DANGER,
    'no-useless-concat': DANGER,
    'no-useless-constructor': DANGER,
    'no-useless-escape': DANGER,
    'no-useless-rename': DANGER,
    'no-useless-return': DANGER,
    'no-var': DANGER,
    'no-void': DANGER,
    'no-warning-comments': DANGER,
    'no-whitespace-before-property': DANGER,
    'no-with': DANGER,
    'nonblock-statement-body-position': DANGER,
    'object-curly-newline': DANGER,
    'object-shorthand': DANGER,
    'operator-assignment': DANGER,
    'operator-linebreak': DANGER,
    'padding-line-between-statements': DANGER,
    radix: DANGER,
    'rest-spread-spacing': DANGER,
    'semi-spacing': DANGER,
    'semi-style': DANGER,
    'sort-imports': DANGER,
    'space-in-parens': DANGER,
    'space-infix-ops': DANGER,
    'space-unary-ops': DANGER,
    'spaced-comment': DANGER,
    strict: DANGER,
    'switch-colon-spacing': DANGER,
    'symbol-description': DANGER,
    'template-curly-spacing': DANGER,
    'template-tag-spacing': DANGER,
    'unicode-bom': DANGER,
    'use-isnan': DANGER,
    'valid-typeof': DANGER,
    'vars-on-top': DANGER,
    'wrap-iife': DANGER,
    'wrap-regex': DANGER,
    'yield-star-spacing': DANGER,
    yoda: DANGER
  }
};