App Routing

Fusebase Apps apps are each served from their own subdomain root:

https://{app-subdomain}.{FUSEBASE_APP_HOST}/

Read FUSEBASE_APP_HOST from the project .env when constructing app URLs. The app always owns the full path space from /.

IMPORTANT: Always use path-based routing (BrowserRouter). Hash-based routing (HashRouter) is forbidden — hash fragments are stripped during redirects (e.g. OAuth, SSO), causing users to lose their navigation state.

Path-Based Routing

Routes work as normal from root:

https://my-app.{FUSEBASE_APP_HOST}/settings
https://my-app.{FUSEBASE_APP_HOST}/users/42

Configure the router

import { BrowserRouter, Routes, Route } from 'react-router-dom'

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path="/" element={<Home />} />
        <Route path="/settings" element={<Settings />} />
      </Routes>
    </BrowserRouter>
  )
}

Common Pitfalls

1. Using HashRouter — Forbidden. Hash fragments are dropped on redirects, breaking navigation after OAuth or SSO flows.
2. Hardcoded absolute paths — Use React Router's <Link> component, not raw <a href="/settings">.
3. Defining routes under /api — The /api prefix is reserved for the backend when an app has one. Never create SPA routes under /api/*. See skill app-backend.