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vue实现无限数据加载

2026-01-21 06:29:08VUE

Vue实现无限数据加载的方法

无限数据加载（Infinite Scroll）是一种常见的前端交互模式，适用于长列表数据的动态加载。以下是几种在Vue中实现无限数据加载的方法：

使用Intersection Observer API

Intersection Observer API可以高效地监听元素是否进入视口，适合实现无限滚动。

<template>
  <div>
    <div v-for="item in items" :key="item.id">{{ item.content }}</div>
    <div ref="loader" v-if="!isLoading && hasMore">Loading...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      isLoading: false,
      hasMore: true,
      page: 1
    }
  },
  mounted() {
    this.loadItems();
    this.initIntersectionObserver();
  },
  methods: {
    initIntersectionObserver() {
      const observer = new IntersectionObserver((entries) => {
        if (entries[0].isIntersecting && !this.isLoading && this.hasMore) {
          this.loadItems();
        }
      });
      observer.observe(this.$refs.loader);
    },
    async loadItems() {
      this.isLoading = true;
      try {
        const newItems = await fetchItems(this.page);
        this.items = [...this.items, ...newItems];
        this.page++;
        this.hasMore = newItems.length > 0;
      } finally {
        this.isLoading = false;
      }
    }
  }
}
</script>

使用滚动事件监听

传统方法通过监听滚动事件实现，需要注意性能优化。

<template>
  <div @scroll="handleScroll" style="height: 500px; overflow-y: auto;">
    <div v-for="item in items" :key="item.id">{{ item.content }}</div>
    <div v-if="isLoading">Loading...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      isLoading: false,
      hasMore: true,
      page: 1
    }
  },
  mounted() {
    this.loadItems();
  },
  methods: {
    handleScroll(e) {
      const { scrollTop, clientHeight, scrollHeight } = e.target;
      const isBottom = scrollTop + clientHeight >= scrollHeight - 100;

      if (isBottom && !this.isLoading && this.hasMore) {
        this.loadItems();
      }
    },
    async loadItems() {
      this.isLoading = true;
      try {
        const newItems = await fetchItems(this.page);
        this.items = [...this.items, ...newItems];
        this.page++;
        this.hasMore = newItems.length > 0;
      } finally {
        this.isLoading = false;
      }
    }
  }
}
</script>

使用第三方库

Vue-infinite-loading是一个专门为Vue设计的无限滚动组件。

安装：

npm install vue-infinite-loading

使用：

<template>
  <div>
    <div v-for="item in items" :key="item.id">{{ item.content }}</div>
    <infinite-loading @infinite="loadItems"></infinite-loading>
  </div>
</template>

<script>
import InfiniteLoading from 'vue-infinite-loading';

export default {
  components: { InfiniteLoading },
  data() {
    return {
      items: [],
      page: 1
    }
  },
  methods: {
    async loadItems($state) {
      try {
        const newItems = await fetchItems(this.page);
        if (newItems.length) {
          this.items = [...this.items, ...newItems];
          this.page++;
          $state.loaded();
        } else {
          $state.complete();
        }
      } catch (error) {
        $state.error();
      }
    }
  }
}
</script>