.eslintrc.json

{
    "extends": "eslint:recommended",
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module",
        "ecmaFeatures": {
            "jsx": true
        }
    },
    "rules": {
        "semi": 2,
        "no-undef": "off",
        "eol-last": 2,
        "eqeqeq": "error",
        "indent": ["error", 2],
        "block-spacing": ["error", "always"],
        "comma-spacing": "error",
        "brace-style": "error",
        "function-paren-newline": ["error", "consistent"],
        "space-before-function-paren": ["error", "never"],
        "array-bracket-spacing": ["error", "always"],
        "computed-property-spacing": ["error", "always"],
        "max-len": ["error", 120],
        "key-spacing": "error",
        "quotes": "error",
        "space-infix-ops": "error"
    }
}