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HTTP requests using $fetch

Popularity：126 ℃/2024-08-02 09:28:46

title: HTTP Requests with $fetch
date: 2024/8/2
updated: 2024/8/2
author: cmdragon

excerpt:
Abstract: The article describes the use in Nuxt3 of the\(A method for fetch to make HTTP requests, which is based on the ofetch library and supports SSR and auto-caching. \)fetch simplifies HTTP requests, supports GET, POST, etc. It can be combined with useAsyncData or useFetch to optimize data fetching and avoid repeated requests, and is suitable for server-side rendering.

categories:

  • front-end development

tags:

  • Nuxt3
  • $fetch
  • HTTP
  • SSR
  • (computing) cache
  • Vue
  • API

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In Nuxt3.$fetch is a powerful tool for making HTTP requests in Vue applications and API routing. It is based on theofetch library, and in the Nuxt
Some enhancements such as support for server-side rendering (SSR) and automatic caching are provided.

What is it?$fetch？

$fetch is a helper function exposed globally in Nuxt3 for making HTTP requests. It allows you to easily send GET, POST
and other requests and process the response. As opposed to the traditionalaxios maybefetch Compare.$fetch Provides better integration and optimization, especially when dealing with server-side rendering (SSR).

Why use$fetch？

1. Simplifying HTTP requests

$fetch Provides a clean API that makes it easy to make HTTP requests and handle responses. You can easily get data or send requests in Vue components without having to manually manage request and response logic.

2. Support for server-side rendering (SSR)

Use in Nuxt3$fetch When called during server-side rendering, it will simulate the request directly, avoiding additional API calls. This improves performance and reduces unnecessary network requests.

3. Avoiding duplicate data capture

When using the$fetch When not combined withuseAsyncData maybeuseFetch
use, it may result in data being fetched twice, on the server side and on the client side. To prevent this, it is recommended to use theuseAsyncData maybeuseFetch
to ensure that data is only fetched on the server side and optimized for processing on the client side.

How to use$fetch？

basic usage

$fetch can be used to send various types of HTTP requests. Here are some common examples:

Example 1: Sending a GET Request


<template>
  <div>
    <p>digital：{{ data }}</p>
  </div>
</template>

<script setup lang="ts">
  const data = await $fetch('/api/data');
</script>

In this example, we use the$fetch A GET request is sent to the/api/dataand binds the response data to the component'sdata Variables.

Example 2: Sending a POST Request


<template>
  <button @click="submitForm">submit (a report etc)</button>
</template>

<script setup lang="ts">
  async function submitForm() {
    const response = await $fetch('/api/submit', {
      method: 'POST',
      body: {name: 'John Doe', email: 'john@'},
    });
    (response);
  }
</script>

In this example, we define asubmitForm function, which sends a POST request to the/api/submitand passes a JSON object as the request body.

combininguseAsyncData cap (a poem)useFetch

To optimize data fetching and avoid requesting the same data twice on the server side and on the client side, it is recommended to use theuseAsyncData maybeuseFetch。

Example 3: UsinguseAsyncData


<template>
  <div>
    <p>digital：{{ data }}</p>
  </div>
</template>

<script setup lang="ts">

  const {data} = await useAsyncData('item', () => $fetch('/api/item'));
</script>

In this example, we use theuseAsyncData to fetch the data. This will ensure that data is fetched only once on the server side and passed to the client, avoiding duplicate fetches.

Example 4: UsinguseFetch


<template>
  <div>
    <p>digital：{{ data }}</p>
  </div>
</template>

<script setup lang="ts">

  const {data} = await useFetch('/api/item');
</script>

useFetch beuseAsyncData cap (a poem)$fetch shortcuts that provide similar functionality but are more concise.

utilization$fetch Client-side execution only

Sometimes you may only want to perform certain HTTP requests on the client side. For example, sending a request when a user clicks a button:


<template>
  <button @click="contactForm">Contact Us</button>
</template>

<script setup lang="ts">
  async function contactForm() {
    const response = await $fetch('/api/contact', {
      method: 'POST',
      body: {message: 'Hello from the client!'},
    });
    (response);
  }
</script>

In this example, thecontactForm function is triggered on the client side only, sending a POST request by clicking the button.

Parameter description

  • url: The URL address of the request.
  • options: Optional request options, such asmethod、body、headers etc.

summarize

$fetch is the recommended way to make HTTP requests in Nuxt3, providing a clean API and support for server-side rendering (SSR). By using a combination ofuseAsyncData
maybeuseFetch, you can optimize the data fetching process and avoid duplicate requests. We hope this tutorial will help you better understand and use the$fetch。

For the rest of the article, please click to jump to the personal blog page or scan the code to follow or WeChat search:Programming Intelligence Front-End to Full-Stack Communication and Growth, read the full article:HTTP request using $fetch | cmdragon's Blog

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