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vue实现无线加载

2026-03-29 17:24:41VUE

无限滚动加载的实现方法

无限滚动加载（Infinite Scroll）是一种常见的前端交互模式，适用于长列表数据的展示。以下是基于 Vue 的实现方法：

使用滚动事件监听

通过监听滚动事件判断是否触底，触发数据加载：

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

<script>
export default {
  data() {
    return {
      items: [],
      loading: false,
      page: 1
    }
  },
  methods: {
    handleScroll(e) {
      const { scrollTop, clientHeight, scrollHeight } = e.target
      if (scrollHeight - scrollTop <= clientHeight + 50 && !this.loading) {
        this.loadMore()
      }
    },
    async loadMore() {
      this.loading = true
      const newItems = await fetchData(this.page++)
      this.items.push(...newItems)
      this.loading = false
    }
  }
}
</script>

使用 Intersection Observer API

更现代的实现方式，性能更好：

<template>
  <div class="list-container">
    <div v-for="item in items" :key="item.id">{{ item.content }}</div>
    <div ref="loader" v-if="!finished">{{ loading ? '加载中...' : '' }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      loading: false,
      page: 1,
      finished: false
    }
  },
  mounted() {
    const observer = new IntersectionObserver((entries) => {
      if (entries[0].isIntersecting && !this.loading) {
        this.loadMore()
      }
    })
    observer.observe(this.$refs.loader)
  },
  methods: {
    async loadMore() {
      this.loading = true
      const newItems = await fetchData(this.page++)
      if (newItems.length === 0) this.finished = true
      this.items.push(...newItems)
      this.loading = false
    }
  }
}
</script>

使用第三方库

对于复杂场景，可以考虑使用现成解决方案：

vue实现无线加载

vue-infinite-loading
```
npm install vue-infinite-loading
```

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

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

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