.eslintrc

{
  "root": true,

  "env": {
    "browser": true,
    "worker": true,
    "commonjs": true,
    "amd": true
  },

  "parserOptions": {
    "ecmaVersion": 3
  },

  "rules": {

    ////////// Errors //////////

    "no-const-assign": 2,
    "require-yield": 2,
    "no-unexpected-multiline": 2,
    "no-shadow-restricted-names": 2,
    "comma-dangle": 2,          // array length IE bug
    "no-catch-shadow": 2,
    "wrap-iife": [2, "any"],
    "no-with": 2,
    "no-extra-boolean-cast": 2,
    "no-else-return": 2,
    "no-lonely-if": 2,
    "no-unreachable": 2,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-extra-semi": 2,
    "no-obj-calls": 2,
    "no-useless-call": 2,
    "no-useless-concat": 2,
    "no-useless-computed-key": 2,
    "no-useless-escape": 2,
    "no-native-reassign": [2, {"exceptions": ["JSON", "isNaN"]}],
    "no-redeclare": 2,
    "no-invalid-regexp": 2,
    "no-sparse-arrays": 2,
    "yoda": 2,
    "brace-style": [2, "1tbs", { "allowSingleLine": true }],
    "no-spaced-func": 2,
    "space-before-function-paren": [2, { "anonymous": "always", "named": "never" }],
    "space-before-blocks": 2,
    "keyword-spacing": [2, { "after": true }],
    "switch-colon-spacing": 2,
    "no-empty": [2, { "allowEmptyCatch": true }],
    "for-direction": 2,
    "quote-props": [2, "consistent"],
    "no-console": [2, { "allow": ["info", "warn", "error", "exception"] }],

    ////////// Warnings //////////

    "no-return-await": 1,
    "no-throw-literal": 1,
    "no-mixed-spaces-and-tabs": [1, "smart-tabs"],
    "comma-spacing": 1,
    "no-constant-condition": 1,
    "no-unneeded-ternary": 1,
    "no-extra-bind": 1,
    "no-extra-parens": [1, "all", {
      "returnAssign": false,
      "enforceForNewInMemberExpressions": false
    }],
    "no-return-assign": 1,
    "no-ex-assign": 1,
    "no-func-assign": 1,
    "no-inner-declarations": 1,
    "no-irregular-whitespace": 1,
    "dot-location": [1, "property"],
    "no-empty-character-class": 1,
    "no-regex-spaces": 1,
    "padding-line-between-statements": [1, { "blankLine": "always", "prev": ["const", "let", "var"], "next": "*"}],
    "computed-property-spacing": 1,
    "no-negated-condition": 1,
    "new-cap": [1, { "capIsNew": false }],
    "operator-assignment": [1, "always"],
    "no-trailing-spaces": [1, { "skipBlankLines": true }],
    "max-params": [1, 4],
    "func-names": [1, "never"],  // https://kangax.github.io/nfe/
    "quotes": [1, "single", { "avoidEscape": true }]
  }

}