.eslintrc.json

{
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true,
        "node": true
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "sourceType": "module"
    },
    "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",
        "no-tabs": 0,
        "import/no-extraneous-dependencies": [
            2,
            {
                "devDependencies": true
            }
        ],
        "react/jsx-filename-extension": [
            1,
            {
                "extensions": [
                    ".js",
                    ".jsx"
                ]
            }
        ]
    },
    "extends": "airbnb"
}