VUE3 development basics: Create an infinite scrolling list using the Vue.js plug-in

Vue.js is a popular JavaScript framework for quickly building interactive web applications. The latest Vue.js 3 version offers many new features and performance optimizations, one of which is a very common request is to create infinite scrolling lists. This article will introduce how to use the Vue.js plugin to create an infinite scrolling list.

What is an infinite scrolling list?

Infinite scrolling lists are a common design pattern in web applications that can dynamically load large amounts of data (e.g., articles, product lists, etc.) and automatically load more data as the user scrolls down. This design pattern is very effective in improving user experience and reducing page load time.

Vue.js plugin

Vue.js uses plugins to extend its functionality. Plugins can add some global functionality to Vue.js applications and are easy to use in Vue.js projects. Vue.js plugins are typically added to applications via the Vue.use() method.

Infinite scrolling list plugin

In Vue.js, there are several infinite scrolling list plugins available. One of them is v-infinite-scroll. v-infinite-scroll is a lightweight, directive-based vue.js plugin that can dynamically load content through DOM events (‘scroll’).

Use the v-infinite-scroll plug-in to implement an infinite scrolling list

The following are the steps to implement a simple infinite scrolling list using the v-infinite-scroll plug-in:

First Step: Install v-infinite-scroll plug-in

Use npm or yarn to install v-infinite-scroll plug-in:

npm install vue-infinite-scroll

Or

yarn add vue-infinite-scroll

Step 2: Import the v-infinite-scroll plug-in

Import in the Vue component v-infinite-scroll plug-in:

import infiniteScroll from ‘vue-infinite-scroll’
export default {
  directives: { 
    infiniteScroll
  }
}

Step 3: Add v-infinite-scroll directive in HTML

Add v-infinite-scroll directive on elements that require infinite scrolling:

<div v-infinite-scroll="loadMore" infinite-scroll-disabled="busy" infinite-scroll-distance="10">
  <ul>
    <li v-for="(item, index) in list" :key="index">{{ item }}</li>
  </ul>
</div>

You can see that when scrolling to 10 elements from the bottom, the loadMore method is triggered. However, since we don't want the user to make any other requests while the data is loading, we need to add the busy flag to disable the directive until the data is loaded.

Step 4: Implement the loadMore method in the Vue component

Define and implement the loadMore method in the Vue component, which is used to load more data and add it to the list:

export default {
  data() {
    return {
      list: [
        'Item 1',
        'Item 2',
        'Item 3'
      ],
      busy: false
    }
  },
  methods: {
    async loadMore() {
      if (this.busy) return
      this.busy = true
      // 模拟从服务器获得新数据的延迟
      await new Promise(resolve => setTimeout(resolve, 2000))
      this.list.push('Item ' + (this.list.length + 1))
      this.busy = false
    }
  },
  directives: { 
    infiniteScroll
  }
}

In this example, the loadMore method uses async/await to load new data asynchronously. Once loading the data is complete, add the new data to the existing list and set the busy flag to false to re-enable the directive.

Summary

Using Vue.js plugins can make Vue.js applications more scalable and flexible. Use the v-infinite-scroll plugin to easily implement infinite scrolling lists, optimize user experience and reduce page loading time. Through the above steps, you can implement a basic infinite scrolling list in Vue.js 3 and supplement it according to your needs.

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