Добавить реагировать на существующий проект
npx create-react-app ./
Spotless Stoat
npx create-react-app ./npx create-react-app "Whatever the foldar name"<script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>