.eslintrc.json

{
    "parser": "babel-eslint",
    "env": {
        "es6": true,
        "node": true
    },
    "extends": "plugin:react/recommended",
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 8
    },
    "globals": {
        "React": "readonly",
        "document": "readonly"
    },
    "rules": {
        "no-console": 0,
        "no-unused-vars": "error",
        "linebreak-style": ["error", "unix"],
        "quotes": ["error", "single"],
        "semi": ["error", "always"],
        "curly": ["error", "all"],
        "default-case": "error",
        "no-else-return": "error",
        "no-empty-function": "error",
        "no-implicit-coercion": "error",
        "no-invalid-this": "error",
        "no-loop-func": "error",
        "no-multi-spaces": "error",
        "no-new-func": "error",
        "no-useless-return": "error",
        "no-path-concat": "error",
        "array-bracket-spacing": ["error", "never"],
        "block-spacing": ["error", "always"],
        "brace-style": ["error", "1tbs"],
        "camelcase": "error",
        "comma-dangle": ["error", "always-multiline"],
        "comma-spacing": ["error", { "before": false, "after": true }],
        "comma-style": ["error", "last"],
        "key-spacing": ["error", { "beforeColon": false, "afterColon": true }],
        "lines-around-comment": ["error", { "beforeBlockComment": true }],
        "newline-before-return": "error",
        "no-multi-assign": "error",
        "new-cap": [
            "error",
            {
                "newIsCap": true,
                "capIsNew": false
            }
        ],
        "no-multiple-empty-lines": [
            "error",
            {
                "max": 2
            }
        ],
        "no-shadow-restricted-names": "error",
        "no-undef-init": "error",
        "keyword-spacing": "error",
        "space-before-blocks": ["error", "always"]
    }
}