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vue实现上拉加载

2026-02-23 16:06:10VUE

Vue 实现上拉加载的方法

使用 Intersection Observer API

Intersection Observer API 提供了一种异步观察目标元素与祖先元素或顶级文档视窗交叉状态的方法。适合实现上拉加载。

<template>
  <div>
    <div v-for="item in list" :key="item.id">{{ item.content }}</div>
    <div ref="loadMore" class="load-more"></div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      list: [],
      page: 1,
      isLoading: false
    }
  },
  mounted() {
    this.initObserver()
    this.loadData()
  },
  methods: {
    initObserver() {
      const observer = new IntersectionObserver((entries) => {
        if (entries[0].isIntersecting && !this.isLoading) {
          this.page++
          this.loadData()
        }
      })
      observer.observe(this.$refs.loadMore)
    },
    async loadData() {
      this.isLoading = true
      try {
        const newData = await fetchData(this.page)
        this.list = [...this.list, ...newData]
      } finally {
        this.isLoading = false
      }
    }
  }
}
</script>

<style>
.load-more {
  height: 20px;
}
</style>

使用滚动事件监听

传统方法通过监听滚动事件判断是否到达底部。

<template>
  <div ref="container" @scroll="handleScroll">
    <div v-for="item in list" :key="item.id">{{ item.content }}</div>
    <div v-if="isLoading">加载中...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      list: [],
      page: 1,
      isLoading: false
    }
  },
  mounted() {
    this.loadData()
  },
  methods: {
    handleScroll() {
      const container = this.$refs.container
      const scrollHeight = container.scrollHeight
      const scrollTop = container.scrollTop
      const clientHeight = container.clientHeight

      if (scrollTop + clientHeight >= scrollHeight - 10 && !this.isLoading) {
        this.page++
        this.loadData()
      }
    },
    async loadData() {
      this.isLoading = true
      try {
        const newData = await fetchData(this.page)
        this.list = [...this.list, ...newData]
      } finally {
        this.isLoading = false
      }
    }
  }
}
</script>

使用第三方库

可以使用现成的 Vue 插件如 vue-infinite-loading 简化实现。

安装：

npm install vue-infinite-loading

使用：

vue实现上拉加载

<template>
  <div>
    <div v-for="item in list" :key="item.id">{{ item.content }}</div>
    <InfiniteLoading @infinite="loadData" />
  </div>
</template>

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

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