Nuxt/docs/3.api/3.utils/$fetch.md

62 lines
2.5 KiB
Markdown
Raw Normal View History

---
title: "$fetch"
description: Nuxt uses ofetch to expose globally the $fetch helper for making HTTP requests.
links:
- label: Source
icon: i-simple-icons-github
to: https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/entry.ts
size: xs
---
Nuxt uses [ofetch](https://github.com/unjs/ofetch) to expose globally the `$fetch` helper for making HTTP requests within your Vue app or API routes.
::tip{icon="i-ph-rocket-launch-duotone" color="gray"}
During server-side rendering, calling `$fetch` to fetch your internal [API routes](/docs/guide/directory-structure/server) will directly call the relevant function (emulating the request), **saving an additional API call**.
::
::note{color="blue" icon="i-ph-info-duotone"}
Using `$fetch` in components without wrapping it with [`useAsyncData`](/docs/api/composables/use-async-data) causes fetching the data twice: initially on the server, then again on the client-side during hydration, because `$fetch` does not transfer state from the server to the client. Thus, the fetch will be executed on both sides because the client has to get the data again.
::
We recommend to use [`useFetch`](/docs/api/composables/use-fetch) or [`useAsyncData`](/docs/api/composables/use-async-data) + `$fetch` to prevent double data fetching when fetching the component data.
```vue [app.vue]
<script setup lang="ts">
// During SSR data is fetched twice, once on the server and once on the client.
const dataTwice = await $fetch('/api/item')
// During SSR data is fetched only on the server side and transferred to the client.
const { data } = await useAsyncData('item', () => $fetch('/api/item'))
// You can also useFetch as shortcut of useAsyncData + $fetch
const { data } = await useFetch('/api/item')
</script>
```
:read-more{to="/docs/getting-started/data-fetching"}
2024-01-10 08:58:30 +00:00
You can use `$fetch` in any methods that are executed only on client-side.
```vue [pages/contact.vue]
<script setup lang="ts">
function contactForm() {
$fetch('/api/contact', {
method: 'POST',
body: { hello: 'world '}
})
}
</script>
<template>
<button @click="contactForm">Contact</button>
</template>
```
::tip
`$fetch` is the preferred way to make HTTP calls in Nuxt instead of [@nuxt/http](https://github.com/nuxt/http) and [@nuxtjs/axios](https://github.com/nuxt-community/axios-module) that are made for Nuxt 2.
::
::note
If you use `$fetch` to call an (external) HTTPS URL with a self-signed certificate in development, you will need to set `NODE_TLS_REJECT_UNAUTHORIZED=0` in your environment.
::