.eslintrc.json

{
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true,
        "node": true,
        "mocha": true        
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "sourceType": "module"
    },
    "globals": {
        "step": true
    },
    "rules": {
        "no-const-assign": "warn",
        "no-this-before-super": "warn",
        "no-undef": "warn",
        "no-unreachable": "warn",
        "no-unused-vars": "warn",
        "constructor-super": "warn",
        "valid-typeof": "warn",
        "indent": [
            2,
            4,
            {
                "SwitchCase": 1
            }
        ],
        "quotes": [
            2,
            "single"
        ],
        "linebreak-style": [
            2,
            "windows"
        ],
        "semi": [
            2,
            "always"
        ],
        "no-console": 0
    },
    "extends": "eslint:recommended"
}