UI Team ESLint (+ Miguel's suggestions)

.eslintrc

{
  "root": true,
  "env": {
		"es6": true,
		"browser": true
	},
  "rules": {
    "indent": [2, "tab"],
    "strict": [2, "global"],
    "no-use-before-define": 0,
    "curly": 2,
    "complexity": 2,
    "eqeqeq": [2, "smart"],
    "no-lone-blocks": 2,
    "no-magic-numbers": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-unused-expressions": 2,
    "no-useless-call": 2,
    "vars-on-top": 2,
    "wrap-iife": [2, "outside"],
    "callback-return": 2,
    "array-bracket-spacing": [2, "never"],
    "block-spacing": [2, "always"],
    "brace-style": [2, "1tbs", {
      "allowSingleLine": true
    }],
    "camelcase": 2,
    "comma-spacing": [2, {
      "before": false,
      "after": true
    }],
    "no-mixed-spaces-and-tabs": 0,
    "comma-style": [2, "last"],
    "computed-property-spacing": [2, "never"],
    "consistent-this": [2, "self"],
    "func-names": 2,
    "func-style": [2, "declaration", {
      "allowArrowFunctions": true
    }],
    "key-spacing": [2, {
      "beforeColon": false,
      "afterColon": true
    }],
    "lines-around-comment": [2, {
        "beforeBlockComment": true,
        "beforeLineComment": true,
        "afterLineComment": false
      }
    ],
    "max-nested-callbacks": [2, 2],
    "new-cap": 2,
    "newline-after-var": [1, "always"],
    "no-inline-comments": 1,
    "no-lonely-if": 0,
    "padded-blocks": [0, "always"],
    "one-var": [1, "never"],
    "operator-assignment": [1, "never"],
    "operator-linebreak": [1, "after"],
    "quote-props": [1, "consistent-as-needed", {
      "keywords": true
    }],
    "quotes": [1, "single", "avoid-escape"],
    "space-after-keywords": [1, "always"],
    "space-before-blocks": 2,
    "space-before-function-paren": [1, {
      "anonymous": "always",
      "named": "never"
    }],
    "space-in-parens": [0, "always"],
    "space-before-keywords": [1, "always"],
    "spaced-comment": [1, "always", {
      "exceptions": ["-"]
    }],
    "object-curly-spacing": [1, "always", {
      "objectsInObjects": false,
      "arraysInObjects": false
    }],
    "max-len": [2, 80, 4]
  },
  "globals": {
    "angular": false
  }
}

Sweet, looks good.

Here's my feedback:

Aways use strict mode. If using ES6 modules then set it global, otherwise function scoped.

"strict": [2, "global”]

Not sure why we need spaces in inside parenthesis. Seems to go against JavaScript conventions. I’d set it to none.

space-in-parens": [0, "always"]

Space before function paren should be none if named function. Only need a space after function keyword; according to all the popular JavaScript style guides.

 ”space-before-function-paren”: [1, {
      "anonymous": "always",
      "named": "never"
   }],

Set es6 flag to true if using babel otherwise it'll complain about es6 features.

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