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Efficient Data Acquisition and Management with useNuxtData

Popularity：168 ℃/2024-07-22 15:09:28

title: Efficient Data Acquisition and Management with useNuxtData
date: 2024/7/22
updated: 2024/7/22
author: cmdragon

excerpt:
An in-depth explanation of the useNuxtData combinatorial function in Nuxt 3 is provided, demonstrating how to access cached data through this function to achieve inter-component data sharing, as well as how to utilize the cache to improve the user experience when updating data. The article provides specific usage examples, including scenarios of data fetching, accessing cached data and data updating.

categories:

  • front-end development

tags:

  • Nuxt3
  • (computing) cache
  • digital
  • enjoy together
  • subassemblies
  • update
  • performances

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useNuxtData summarize

useNuxtDatais a combinatorial function in Nuxt 3 that is used to access data obtained through other data acquisition functions such as theuseAsyncData、useLazyAsyncData、useFetch
respond in singinguseLazyFetchetc.) cached data. It allows sharing data between different components, avoiding duplicate requests and improving performance.

Key Features

  1. Accessing cached data: Access previously cached data by providing a unique key name.
  2. data sharing: Different components can share the same data source to ensure data consistency.
  3. update: Cached data can be used as placeholders during data updates to improve the user experience.

usage example

1. Fetching and caching data

existpages/In this case, we can use theuseFetchto fetch the post data and cache it into thepostsunder the key name:

// pages/
<script setup>

// utilization useFetch Fetching and caching data
const { data, error } = await useFetch('/api/posts', { key: 'posts' })

// process error
if () {
  ('Failed to get post:', )
}
</script>

<template>
  <div>
    <h1>List of Posts</h1>
    <ul>
      <li v-for="post in data" :key="">{{ }}</li>
    </ul>
  </div>
</template>

2. Access to cached data

existpages/posts/[id].vueIn this case, we can use theuseNuxtDataaccessThe cached post data in the

// pages/posts/[id].vue
<script setup>
import { useRoute } from 'vue-router'

// Get the route parameters
const { id } = useRoute().params

// Access cached post data
const { data: posts } = useNuxtData('posts')

// Use useLazyFetch to get the details of a single post
const { data, error } = useLazyFetch(`/api/posts/${id}`, {
  key: `post-${id}`, {
  default() {
    // Find the corresponding post from the cache and set it to the default value
    return (post => === id) || null
  }
})

// Handle errors
if () {
  ('Failed to get post details:', )
}
</script>

<template>
  <div>
    <h1> post details </h1>
    <div v-if="data">
      <h2>{{ }}</h2>
      <p>{{ }}</p>
    </div>
  </div>.
</template>

3. Updates

existpages/In this case, we can use theuseAsyncDatato fetch to-do items and optimistically update them using the cache when new to-do items are added:

// pages/
<script setup>

// Fetch to-do data and cache it
const { data: todos, error } = await useAsyncData('todos', () => $fetch('/api/todos'))

// Handle the error
if () {
  ('Failed to get todos:', )
}
</script>

<template>
  <div>
    <h1> To-Do List</h1>
    <ul>.
      <li v-for="todo in todos" :key="">{{ }}</li>
    </ul>
    <NewTodo />
  </div>.
</template>

existcomponents/in which we can implement the logic for adding a new to-do item:

// components/
<script setup>
import { ref } from 'vue'

const newTodo = ref('')
const previousTodos = ref([])

// Access the cached values for useAsyncData in
const { data: todos } = useNuxtData('todos')

const addTodo = async () => {
  const { data, error } = await useFetch('/api/addTodo', {
    method: 'post', {
    body: {
      todo.
    }, { method: 'post', body: { todo.
    onRequest() {
      // Save the current todos data at the start of the request.
       = [...]
      // Optimistically update the UI
      ({ id: (), task: }) // Assume the ID is the current timestamp.
    }, onRequestError()
    onRequestError() {
      // Roll back data if the request fails
       =}, onRequestError() { // Rolls back data if the request fails.
    }, async onResponse() {
    async onResponse() {
      // Refresh the todos data when the request is successful
      await refreshNuxtData('todos')
    }
  })

  // Empty the input box
   = ''
}
</script>

<template>
  <div>
    <input v-model="newTodo" placeholder="Add New Todo" /> <input v-model="newTodo" placeholder="Add New Todo" />
    <button @click="addTodo"> add </button>
  </div>
</template>

type definition

useNuxtDataThe type definitions are as follows:

useNuxtData<DataT = any> (key: string): { data: Ref<DataT | null> }
  • key: The key name used to access the cached data.
  • data: Returns a responsive reference containing the cached data or thenull。

caveat

  • Ensure that when using theuseNuxtDataWhen caching data, the key name provided is the same as the key name used when caching data previously.
  • When performing optimistic updates, be careful how you handle rollbacks of data to avoid users seeing inconsistent state.

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:Efficient Data Acquisition and Management with useNuxtData | cmdragon's Blog

Past articles are archived:

  • Nuxt 3 User Guide: Getting to grips with useNuxtApp and the runtime context | cmdragon's Blog
  • Asynchronous Data Fetching with useLazyFetch | cmdragon's Blog
  • Enhancing the data loading experience with useLazyAsyncData | cmdragon's Blog
  • Using useHydration for Data Hydration and Synchronization | cmdragon's Blog
  • useHeadSafe: Generating HTML Head Elements Safely | cmdragon's Blog
  • Header Magic: Easily Customize Page Meta Information to Improve User Experience | cmdragon's Blog
  • Exploring useFetch: A Guide to Efficient Data Acquisition and Processing | cmdragon's Blog
  • Error Detective: useError Combined Functions | cmdragon's Blog
  • useCookie function: Managing cookies in an SSR environment | cmdragon's Blog
  • Easy to master useAsyncData to get asynchronous data | cmdragon's Blog
  • Using useAppConfig: Managing Application Configuration with Ease | cmdragon's Blog
  • Nuxt Framework Built-in Components Explained and Usage Guide (V) | cmdragon's Blog
  • Nuxt Framework Built-in Components Explained and Usage Guide (4) | cmdragon's Blog
  • Nuxt Framework Built-in Components Explained and Usage Guide (3) | cmdragon's Blog
  • Nuxt Framework Built-in Components Explained and Usage Guide (II) | cmdragon's Blog
  • Nuxt Framework Built-in Components Explained and Usage Guide (1) | cmdragon's Blog
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