React Example: Authenticated Routes

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import React from 'react'
import ReactDOM from 'react-dom/client'
import { RouterProvider, createRouter } from '@tanstack/react-router'

import { routeTree } from './routeTree.gen'
import { AuthProvider, useAuth } from './auth'
import './styles.css'

// Set up a Router instance
const router = createRouter({
  routeTree,
  defaultPreload: 'intent',
  scrollRestoration: true,
  context: {
    auth: undefined!, // This will be set after we wrap the app in an AuthProvider
  },
})

// Register things for typesafety
declare module '@tanstack/react-router' {
  interface Register {
    router: typeof router
  }
}

function InnerApp() {
  const auth = useAuth()
  return <RouterProvider router={router} context={{ auth }} />
}

function App() {
  return (
    <AuthProvider>
      <InnerApp />
    </AuthProvider>
  )
}

const rootElement = document.getElementById('app')!

if (!rootElement.innerHTML) {
  const root = ReactDOM.createRoot(rootElement)
  root.render(
    <React.StrictMode>
      <App />
    </React.StrictMode>,
  )
}