.eslintrc

{
    "settings" : {
    "ecmascript": 6,
    "jsx": true
    },
    "env": {
        "browser": true,
        "node": true
    },
    "ecmaFeatures": {
        "blockBindings": true,
        "forOf": true,
        "defaultParams": true,
        "globalReturn": false,
        "modules": true,
        "objectLiteralShorthandMethods": true,
        "objectLiteralShorthandProperties": true,
        "templateStrings": true,
        "spread": true,
        "jsx": true,
        "arrowFunctions": true,
        "classes": true,
        "destructuring": true,
        "objectLiteralComputedProperties": true
    },
    "globals": {
        "ENV": true,
        "beforeEach": true,
        "describe": true,
        "it": true,
        "expect": true,
        "sinon": true
    },
    "rules": {
        "no-unused-expressions": 1,
        "no-extra-boolean-cast": 1,
        "no-multi-spaces": 2,
        "no-underscore-dangle": 0,
        "comma-dangle": 2,
        "camelcase": 0,
        "curly": 2,
        "eqeqeq": 2,
        "guard-for-in": 2,
        "wrap-iife": 0,
        "no-use-before-define": [1, "nofunc"],
        "new-cap": 2,
        "quotes": 0,
        "strict": 0,
        "no-caller": 2,
        "no-empty": 1,
        "no-new": 2,
        "no-plusplus": 0,
        "no-unused-vars": 1,
        "no-trailing-spaces": 2,

        // STYLE
        "max-params": [2, 7],
        "key-spacing": [1, {
            beforeColon: false,
            afterColon: true
        }],
        "indent": [2, 4],
        "brace-style": [2, "1tbs"],
        "comma-spacing": [2, {before: false, after: true}],
        "comma-style": [2, "last"],
        "consistent-this": [1, "self"],
        "eol-last": 0,
        "new-parens": 2,
        "no-array-constructor": 2,
        "no-mixed-spaces-and-tabs": 2,
        "no-multiple-empty-lines": 2,
        "semi-spacing": 2,
        "dot-notation": 2,
        "no-spaced-func": 1,
        "no-shadow": 2,
        "no-undef": 2,
        "padded-blocks": [2, "never"],
        "semi": [2, "always"],
        "space-after-keywords": [2, "always"],
        "space-infix-ops": 2,
        "max-len" : [1, 120],
        "consistent-return": 2,
        "yoda": 2
    }
}