.eslintrc

{
  "env": {
    "es6": true
  },

  "ecmaFeatures": {
    // env=es6 doesn't include modules, which we are using
    "modules": true
  },

  "extends": "eslint:recommended",

  "rules": {
    // Possible Errors (overrides from recommended set)
    "no-extra-parens": 2,
    "no-unexpected-multiline": 2,
    // All JSDoc comments must be valid
    "valid-jsdoc": [ 2, {
        "requireReturn": false,
        "requireReturnDescription": false,
        "requireParamDescription": true,
        "prefer": {
            "return": "returns"
        }
    }],

    // Best Practices

    // Allowed a getter without setter, but all setters require getters
    "accessor-pairs": [ 2, {
      "getWithoutSet": false,
      "setWithoutGet": true
    }],
    "block-scoped-var": 1,
    "consistent-return": 2,
    "curly": 2,
    "default-case": 1,
    // the dot goes with the property when doing multiline
    "dot-location": [ 1, "property" ],
    "dot-notation": 1,
    "eqeqeq": [ 2, "smart" ],
    "guard-for-in": 1,
    "no-alert": 2,
    "no-caller": 2,
    "no-case-declarations": 1,
    "no-div-regex": 1,
    "no-else-return": 1,
    "no-empty-label": 1,
    "no-empty-pattern": 1,
    "no-eq-null": 1,
    "no-eval": 2,
    "no-extend-native": 2,
    "no-extra-bind": 1,
    "no-floating-decimal": 1,
    "no-implicit-coercion": [ 1, {
      "boolean": true,
      "number": true,
      "string": true
    }],
    "no-implied-eval": 2,
    "no-invalid-this": 2,
    "no-iterator": 2,
    "no-labels": 1,
    "no-lone-blocks": 1,
    "no-loop-func": 2,
    "no-magic-numbers": 1,
    "no-multi-spaces": 2,
    "no-multi-str": 1,
    "no-native-reassign": 2,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-new": 2,
    "no-octal-escape": 2,
    "no-param-reassign": 2,
    "no-process-env": 1,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-return-assign": 2,
    "no-script-url": 2,
    "no-self-compare": 2,
    "no-throw-literal": 2,
    "no-unused-expressions": 2,
    "no-useless-call": 2,
    "no-useless-concat": 2,
    "no-void": 1,
    // Produce warnings when something is commented as TODO or FIXME
    "no-warning-comments": [ 1, {
      "terms": [ "TODO", "FIXME" ],
      "location": "start"
    }],
    "no-with": 1,
    "radix": 1,
    "vars-on-top": 2,
    // Enforces the style of wrapped functions
    "wrap-iife": [ 2, "outside" ],
    "yoda": 2,

    // Strict Mode - for ES6, never use strict.
    "strict": [ 2, "never" ],

    // Variables
    "init-declarations": [ 2, "always" ],
    "no-catch-shadow": 1,
    "no-delete-var": 2,
    "no-label-var": 2,
    "no-shadow-restricted-names": 2,
    "no-shadow": 1,
    // We require all vars to be initialized (see init-declarations)
    // If we NEED a var to be initialized to undefined, it needs to be explicit
    "no-undef-init": 0,
    "no-undef": 2,
    "no-undefined": 0,
    "no-unused-vars": 1,
    // Disallow hoisting - let & const don't allow hoisting anyhow
    "no-use-before-define": 2,

    // Node.js and CommonJS
    "callback-return": [ 1, [ "callback", "next" ]],
    "global-require": 2,
    "handle-callback-err": 1,
    "no-mixed-requires": 1,
    "no-new-require": 2,
    // Use path.concat instead
    "no-path-concat": 2,
    "no-process-exit": 2,
    "no-restricted-modules": 0,
    "no-sync": 1,

    // ECMAScript 6 support
    "arrow-body-style": [ 2, "always" ],
    "arrow-parens": [ 2, "always" ],
    "arrow-spacing": [ 2, { "before": true, "after": true }],
    "constructor-super": 2,
    "generator-star-spacing": [ 2, "before" ],
    "no-arrow-condition": 2,
    "no-class-assign": 2,
    "no-const-assign": 2,
    "no-dupe-class-members": 2,
    "no-this-before-super": 2,
    "no-var": 1,
    "object-shorthand": [ 1, "never" ],
    "prefer-arrow-callback": 1,
    "prefer-spread": 1,
    "prefer-template": 1,
    "require-yield": 2,

    // Stylistic - everything here is a warning because of style.
    "array-bracket-spacing": [ 1, "always" ],
    "block-spacing": [ 1, "always" ],
    "brace-style": [ 1, "1tbs", { "allowSingleLine": false } ],
    "camelcase": 1,
    "comma-spacing": [ 1, { "before": false, "after": true } ],
    "comma-style": [ 1, "last" ],
    "computed-property-spacing": [ 1, "never" ],
    "consistent-this": [ 1, "self" ],
    "eol-last": 1,
    "func-names": 1,
    "func-style": [ 1, "declaration" ],
    "id-length": [ 1, { "min": 2, "max": 32 } ],
    "indent": [ 1, 4 ],
    "jsx-quotes": [ 1, "prefer-double" ],
    "linebreak-style": [ 1, "unix" ],
    "lines-around-comment": [ 1, { "beforeBlockComment": true } ],
    "max-depth": [ 1, 8 ],
    "max-len": [ 1, 132 ],
    "max-nested-callbacks": [ 1, 8 ],
    "max-params": [ 1, 8 ],
    "new-cap": 1,
    "new-parens": 1,
    "no-array-constructor": 1,
    "no-bitwise": 0,
    "no-continue": 0,
    "no-inline-comments": 0,
    "no-lonely-if": 1,
    "no-mixed-spaces-and-tabs": 1,
    "no-multiple-empty-lines": 1,
    "no-negated-condition": 0,
    "no-nested-ternary": 1,
    "no-new-object": 1,
    "no-plusplus": 0,
    "no-spaced-func": 1,
    "no-ternary": 0,
    "no-trailing-spaces": 1,
    "no-underscore-dangle": 1,
    "no-unneeded-ternary": 1,
    "object-curly-spacing": [ 1, "always" ],
    "one-var": 0,
    "operator-assignment": [ 1, "never" ],
    "operator-linebreak": [ 1, "after" ],
    "padded-blocks": [ 1, "never" ],
    "quote-props": [ 1, "consistent-as-needed" ],
    "quotes": [ 1, "single" ],
    "require-jsdoc": [ 1, {
      "require": {
          "FunctionDeclaration": true,
          "MethodDefinition": true,
          "ClassDeclaration": false
      }
    }],
    "semi-spacing": [ 1, { "before": false, "after": true }],
    "semi": [ 2, "always" ],
    "sort-vars": 0,
    "space-after-keywords": [ 1, "always" ],
    "space-before-blocks": [ 1, "always" ],
    "space-before-function-paren": [ 1, "never" ],
    "space-before-keywords": [ 1, "always" ],
    "space-in-parens": [ 1, "never" ],
    "space-infix-ops": [ 1, { "int32Hint": true } ],
    "space-return-throw-case": 2,
    "space-unary-ops": 2,
    "spaced-comment": [ 1, "always" ],
    "wrap-regex": 1
  }
}