.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "node": true
    },
    "extends": [
        "eslint:recommended"
    ],
    "parser":"babel-eslint",
    "parserOptions": {
        "ecmaVersion": 6,
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true,
            "jsx": true
        },
        "sourceType": "module"
    },
    "plugins": [
    ],
    "rules": {
        "indent": [
            "error",
            4,
            {
                "SwitchCase": 1
            }
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "always"
        ],
        "eol-last": [
            "error",
            "always"
        ],
        "max-len": [
            "error",
            140
        ],
        "no-console": 0,
        "key-spacing": [
            "error", {
                "beforeColon": false,
                "afterColon": true
            }
        ]
    }
}