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How to use Vue to achieve infinite loading effects

How to use Vue to achieve infinite loading effects

The infinite loading effect is a common web page interaction effect that automatically loads more content when the user scrolls the page to the bottom. . In Vue, we can use the instructions and life cycle hook functions it provides to achieve this special effect. This article will introduce how to use Vue to achieve infinite loading effects and provide specific code examples.

Step 1: Project initialization

First, install Vue and the corresponding dependencies in the Vue project. Run the following command in the terminal to install:

npm install vue

Step 2: Create a Vue component

Next, we need to create a component for rendering the list and handling infinite loading logic.

First, create a new component (for example, InfiniteList) in your Vue project.

<template>
  <div>
    <ul>
      <li v-for="item in items" :key="item">{{ item }}</li>
      <li ref="sentinel"></li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      page: 1,
      isLoading: false
    };
  },
  mounted() {
    window.addEventListener('scroll', this.handleScroll);
    this.loadData();
  },
  methods: {
    loadData() {
      this.isLoading = true;
      // 模拟异步加载数据
      setTimeout(() => {
        for (let i = 0; i < 10; i++) {
          this.items.push(`Item ${this.items.length + 1}`);
        }
        this.isLoading = false;
      }, 1000);
    },
    handleScroll() {
      const sentinel = this.$refs.sentinel;
      if (sentinel.getBoundingClientRect().top <= window.innerHeight) {
        this.page++;
        this.loadData();
      }
    }
  },
  destroyed() {
    window.removeEventListener('scroll', this.handleScroll);
  }
};
</script>

In the above code, we define a data item items, which is used to store the loaded content list; page is used to record the number of pages currently loaded; isLoading is used to mark whether data is currently being loaded.

In the mounted hook function of the component, we listened to the scroll event of the window object and called during initialization. The loadData method is used to load initial data.

loadData method simulates an asynchronous data loading process. When the data is loaded, we use a for loop to add the newly loaded data to the items array, and set isLoading to false Indicates loading is complete.

handleScroll method is used to handle scroll events. We determine whether to scroll to the bottom of the page by obtaining the position information of the sentinel element. When scrolling to the bottom, call the loadData method to load more data.

Finally, in the destroyed hook function of the component, we removed the monitoring of the scroll event to avoid memory leaks after the component is destroyed.

Step 3: Use components

In the main component of your Vue project (such as App.vue), introduce and use the InfiniteList component just created.

<template>
  <div>
    <h1 id="Infinite-List">Infinite List</h1>
    <InfiniteList></InfiniteList>
  </div>
</template>

<script>
import InfiniteList from './components/InfiniteList.vue';

export default {
  components: {
    InfiniteList
  }
};
</script>

Step 4: Style design

Finally, we need to style the list to show the effect of infinite loading effects. You can style it to your liking to better suit your project needs.

The above example code only provides the most basic list rendering and scrolling loading functions, and you can expand it according to your actual needs. For example, you can add loading animation effects, add pull-down refresh and other functions.

Through the above steps, you have successfully implemented infinite loading effects in your Vue project. When users scroll to the bottom of the page, more content is automatically loaded, improving the user experience.

I hope this article will help you understand how to use Vue to achieve infinite loading effects. If you encounter any questions, feel free to ask us!

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