Fetch data from two or more endpoints in SvelteKit
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Real quick example of how I used Promise.all
to fetch data from
multiple endpoints in SvelteKit.
This uses the server side fetch
that is part of SvelteKit and is
destructured into the load
function.
Note that the code is in the <script context="module">
tag, this
means it runs before the page is loaded.
<script context="module">
export async function load({ fetch }) {
const [pagesReq, postsReq] = await Promise.all([
fetch('/pages.json'),
fetch('/posts.json'),
])
if (pagesReq.ok && postsReq.ok) {
const { pages } = await pagesReq.json()
const { posts } = await postsReq.json()
return {
props: {
pages,
posts,
},
}
}
}
</script>
Full file looks a little like this example:
<!-- src/routes/index.svelte -->
<script context="module">
export async function load({ fetch }) {
const [pagesReq, postsReq] = await Promise.all([
fetch('/pages.json'),
fetch('/posts.json'),
])
if (pagesReq.ok && postsReq.ok) {
const { pages } = await pagesReq.json()
const { posts } = await postsReq.json()
return {
props: {
pages,
posts,
},
}
}
}
</script>
<script>
import PagesList from '$lib/nav.svelte'
export let pages, posts
</script>
<PagesList {pages} />
<h1>Welcome to SvelteKit</h1>
<p>
Visit <a href="https://kit.svelte.dev">kit.svelte.dev</a> to read the
documentation
</p>
{#each posts as { title, slug, excerpt }}
<a href={`/posts/${slug}`}>
<p>{title}</p>
<p>{excerpt}</p>
</a>
{/each}
That’s it!
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