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vue中实现滚动加载

2026-02-22 15:54:45VUE

滚动加载的实现方法

在Vue中实现滚动加载通常涉及监听滚动事件，判断是否滚动到底部，然后触发数据加载。以下是几种常见方法：

使用Intersection Observer API

Intersection Observer是现代浏览器提供的API，性能优于传统滚动事件监听。

<template>
  <div>
    <div v-for="item in items" :key="item.id">{{ item.content }}</div>
    <div ref="loader" class="loader">Loading...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      page: 1,
      isLoading: false
    }
  },
  mounted() {
    this.initObserver()
    this.loadItems()
  },
  methods: {
    initObserver() {
      const observer = new IntersectionObserver((entries) => {
        if (entries[0].isIntersecting && !this.isLoading) {
          this.loadItems()
        }
      })
      observer.observe(this.$refs.loader)
    },
    async loadItems() {
      this.isLoading = true
      const newItems = await fetch(`/api/items?page=${this.page}`)
      this.items = [...this.items, ...newItems]
      this.page++
      this.isLoading = false
    }
  }
}
</script>

使用window滚动事件

传统方法，兼容性更好但性能略差。

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

<script>
export default {
  data() {
    return {
      items: [],
      page: 1,
      isLoading: false
    }
  },
  mounted() {
    this.loadItems()
    window.addEventListener('scroll', this.handleScroll)
  },
  beforeDestroy() {
    window.removeEventListener('scroll', this.handleScroll)
  },
  methods: {
    handleScroll() {
      const scrollTop = document.documentElement.scrollTop || document.body.scrollTop
      const windowHeight = window.innerHeight
      const scrollHeight = document.documentElement.scrollHeight || document.body.scrollHeight

      if (scrollTop + windowHeight >= scrollHeight - 100 && !this.isLoading) {
        this.loadItems()
      }
    },
    async loadItems() {
      this.isLoading = true
      const newItems = await fetch(`/api/items?page=${this.page}`)
      this.items = [...this.items, ...newItems]
      this.page++
      this.isLoading = false
    }
  }
}
</script>

使用第三方库

可以使用vue-infinite-loading等现成库简化实现：

<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($state) {
      try {
        const newItems = await fetch(`/api/items?page=${this.page}`)
        if (newItems.length) {
          this.items = [...this.items, ...newItems]
          this.page++
          $state.loaded()
        } else {
          $state.complete()
        }
      } catch (error) {
        $state.error()
      }
    }
  }
}
</script>