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vue实现滑动加载

2026-03-08 19:32:09VUE

Vue 实现滑动加载的方法

使用 IntersectionObserver API

IntersectionObserver API 可以监听元素是否进入视口，适合实现滑动加载。

<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}`).then(res => res.json())
      this.items = [...this.items, ...newItems]
      this.page++
      this.isLoading = false
    }
  }
}
</script>

使用窗口滚动事件

通过监听窗口滚动事件计算是否到达底部。

vue实现滑动加载

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

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

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

使用第三方库

可以使用 vue-infinite-loading 等第三方库简化实现。

vue实现滑动加载

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