.eslintrc.js

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

module.exports = {
  extends: "eslint:recommended",
  rules: {
    "arrow-body-style": [ERROR, "as-needed"],
    "array-bracket-spacing": [ ERROR, "always" ],
    "arrow-parens": [ ERROR, "always" ],
    "arrow-spacing": [ ERROR ],
    "block-spacing": [ ERROR, "always" ],
    "brace-style": [ ERROR, "1tbs", { "allowSingleLine": true } ],
    "comma-dangle": [ ERROR, "always-multiline" ],
    "comma-spacing": [ ERROR ],
    "comma-style": [ ERROR, "last" ],
    "constructor-super": [ ERROR ],
    "curly": [ ERROR, "all" ],
    "dot-notation": [ ERROR ],
    "eqeqeq": [ ERROR, "allow-null" ],
    "func-style": [ ERROR, "declaration", { "allowArrowFunctions": true } ],
    "indent": [ ERROR, 2 ],
    "key-spacing": [ ERROR ],
    "keyword-spacing": [ ERROR ],
    "linebreak-style": [ ERROR, "unix" ],
    "new-parens": [ ERROR ],
    "max-len": [ ERROR, 80 ],
    "no-array-constructor": [ ERROR ],
    "no-case-declarations": [ ERROR ],
    "no-class-assign": [ ERROR ],
    "no-confusing-arrow": [ ERROR, { "allowParens": true } ],
    "no-console": [ OFF ],
    "no-const-assign": [ ERROR ],
    "no-constant-condition": [ ERROR ],
    "no-dupe-class-members": [ ERROR ],
    "no-eval": [ ERROR ],
    "no-extend-native": [ ERROR ],
    "no-extra-semi": [ ERROR ],
    "no-floating-decimal": [ ERROR ],
    "no-implicit-coercion": [ ERROR ],
    "no-implied-eval": [ ERROR ],
    "no-invalid-this": [ ERROR ],
    "no-labels": [ ERROR ],
    "no-lonely-if": [ ERROR ],
    "no-mixed-requires": [ ERROR ],
    "no-multi-spaces": [ ERROR ],
    "no-multi-str": [ ERROR ],
    "no-multiple-empty-lines": [ ERROR, { "max": 2, "maxEOF": 1 } ],
    "no-native-reassign": [ ERROR ],
    "no-new-func": [ ERROR ],
    "no-new-object": [ ERROR ],
    "no-new-require": [ ERROR ],
    "no-new-wrappers": [ ERROR ],
    "no-param-reassign": [ ERROR ],
    "no-proto": [ ERROR ],
    "no-return-assign": [ ERROR ],
    "no-self-compare": [ ERROR ],
    "no-sequences": [ ERROR ],
    "no-shadow": [ ERROR ],
    "no-shadow-restricted-names": [ ERROR ],
    "no-this-before-super": [ ERROR ],
    "no-throw-literal": [ ERROR ],
    "no-trailing-spaces": [ ERROR ],
    "no-unexpected-multiline": [ ERROR ],
    "no-unneeded-ternary": [ ERROR ],
    "no-unreachable": [ ERROR ],
    "no-use-before-define": [ ERROR, "nofunc" ],
    "no-var": [ ERROR ],
    "no-void": [ ERROR ],
    "no-with": [ ERROR ],
    "object-curly-spacing": [ ERROR, "always" ],
    "one-var": [ ERROR, { "uninitialized": "always", "initialized": "never" } ],
    "operator-assignment": [ ERROR, "always" ],
    "operator-linebreak": [ ERROR, "after" ],
    "padded-blocks": [ ERROR, "never" ],
    "prefer-const": [ ERROR ],
    "prefer-template": [ ERROR ],
    "quote-props": [ ERROR, "as-needed" ],
    "quotes": [ ERROR, "single", "avoid-escape" ],
    "semi": [ ERROR, "always" ],
    "semi-spacing": [ ERROR ],
    "space-before-blocks": [ ERROR, "always" ],
    "space-before-function-paren": [ ERROR, "never" ],
    "space-in-parens": [ ERROR, "never" ],
    "space-infix-ops": [ ERROR ],
    "space-unary-ops": [ ERROR ],
    "spaced-comment": [ ERROR, "always" ],
    "strict": [ ERROR, "global" ],
    "wrap-iife": [ ERROR, "inside" ],
    "yoda": [ ERROR, "never" ],
  },
  env: {
    "es6": true,
    "node": true,
    "mocha": true,
  },
};