App.jsx

import { Suspense, lazy, useState } from 'react'
import { BrowserRouter as Router, Routes, Route, Link } from 'react-router-dom'

const PetList = lazy(() => import ('./pages/PetList'))
const PetDetail = lazy(() => import ('./pages/PetDetail'))
const EditPet = lazy(() => import ('./pages/EditPet'))
const AddPet = lazy(() => import ('./pages/AddPet'))

function App() {
    const [petToEdit, setPetToEdit] = useState(null)

    return (
        <div className="App">
            <Router>
                <h1>Pet Shelter</h1>

                <Link to='/add'>
                    <button>Add new pet</button>
                </Link>

                <Routes>
                    <Route path='/' element={<Suspense fallback={<></>}><PetList /></Suspense>}/>

                    <Route path='/:petId' element={<Suspense fallback={<></>}><PetDetail setPetToEdit={setPetToEdit} /></Suspense>}/>

                    <Route path='/:petId/edit' element={<Suspense fallback={<></>}><EditPet petToEdit={petToEdit} /></Suspense>}/>

                    <Route path='/add' element={<Suspense fallback={<></>}><AddPet /></Suspense>}/>
                </Routes>
            </Router>
        </div>
    )
}

export default App