es6 style

.eslintrc

{
    "globals": {
        "log": false
    },
    "rules": {
        "indent": [
            2,
            2,
            {"VariableDeclarator": { "var": 2, "let": 2, "const": 3}}
        ],
        "quotes": [
            2,
            "single"
        ],
        "linebreak-style": [
            2,
            "unix"
        ],
        "no-console": [
            1,
            {
                allow: ["warn", "error"]
            }
        ],
        "semi": [
            2,
            "always"
        ],
        "no-unused-vars": [
            2,
            {
                "vars": "local", "args": "none"
            }
        ]
    },
    "env": {
        "es6": true,
        "node": true,
        "browser": true,
        "mocha": true
    },
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module"
    },
    "extends": "eslint:recommended"
}