React Navigation routers work on web and allow you to share navigation logic with native apps. The views currently bundled in react-navigation currently only work on React Native, but that may change with future-facing projects like react-primitives.
This website is built with React Navigation, specifically using createNavigator and TabRouter.
See the source code of the site here: App.js.
To see how the app gets rendered on the server, see Server.js. On the browser, the App wakes up and gets rendered with BrowserAppContainer.js.
Soon this guide will be replaced with a more thorough walkthrough of react-navigation usage on the web.