In v4, react-router exports the core components and functions. react-router-dom exports DOM-aware components line <Link> and <BrowserRouter>. react-router-dom re-exports all of react-router's exports, so you only need to import from react-router-domn in your project.
Link:
Install react-router-dom with the following command:
npm i --save-dev react-router-dom @types/react-router-dom
Install types and others
Even if create-react-app comes already with React, we will also install the types:
