npm i -g eslint eslint-plugin-react

.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true
    },
    "extends": ["eslint:recommended", "plugin:react/recommended"],
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": ["react"],
    "rules": {
        "no-unused-vars": "off",
        "no-undef": "off",
        "indent": ["error", "tab"],
        "linebreak-style": ["error", "unix"],
        "quotes": ["error", "single"],
        "semi": ["error", "always"],
        "react/jsx-uses-vars": 2
    }
}