The @tanstack/svelte-query package offers a 1st-class API for using TanStack Query via Svelte.
Include the QueryClientProvider near the root of your project:
<script lang="ts">
import { QueryClient, QueryClientProvider } from '@tanstack/svelte-query'
import Example from './lib/Example.svelte'
const queryClient = new QueryClient()
</script>
<QueryClientProvider client={queryClient}>
<Example />
</QueryClientProvider>
<script lang="ts">
import { QueryClient, QueryClientProvider } from '@tanstack/svelte-query'
import Example from './lib/Example.svelte'
const queryClient = new QueryClient()
</script>
<QueryClientProvider client={queryClient}>
<Example />
</QueryClientProvider>
Then call any function (e.g. createQuery) from any component:
<script lang="ts">
import { createQuery } from '@tanstack/svelte-query'
const query = createQuery({
queryKey: ['todos'],
queryFn: () => fetchTodos(),
})
</script>
<div>
{#if $query.isLoading}
<p>Loading...</p>
{:else if $query.isError}
<p>Error: {$query.error.message}</p>
{:else if $query.isSuccess}
{#each $query.data as todo}
<p>{todo.title}</p>
{/each}
{/if}
</div>
<script lang="ts">
import { createQuery } from '@tanstack/svelte-query'
const query = createQuery({
queryKey: ['todos'],
queryFn: () => fetchTodos(),
})
</script>
<div>
{#if $query.isLoading}
<p>Loading...</p>
{:else if $query.isError}
<p>Error: {$query.error.message}</p>
{:else if $query.isSuccess}
{#each $query.data as todo}
<p>{todo.title}</p>
{/each}
{/if}
</div>
If you are using SvelteKit, please have a look at SSR & SvelteKit.
Svelte Query offers useful functions and components that will make managing server state in Svelte apps easier.
Svelte Query offers an API similar to React Query, but there are some key differences to be mindful of.