react-query/examples/svelte/simple/src/App.svelte

<script lang="ts">
  import { QueryClientProvider, QueryClient } from '@tanstack/svelte-query'
  import { SvelteQueryDevtools } from '@tanstack/svelte-query-devtools'
  import Simple from './lib/Simple.svelte'

  const queryClient = new QueryClient()
</script>

<QueryClientProvider client={queryClient}>
  <main>
    <Simple />
  </main>
  <SvelteQueryDevtools />
</QueryClientProvider>