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vue实现滚动加载更多

2026-02-21 14:58:00VUE

Vue 实现滚动加载更多

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 viewport 的交集变化的方法。这种方法性能较好，适合现代浏览器。

<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>

<style>
.loader {
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}
</style>

使用 scroll 事件监听

传统方法通过监听滚动事件实现，适用于需要兼容旧浏览器的场景。

<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" class="loader">Loading...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      page: 1,
      isLoading: false
    };
  },
  mounted() {
    this.loadItems();
  },
  methods: {
    handleScroll(e) {
      const { scrollTop, clientHeight, scrollHeight } = e.target;
      if (scrollHeight - (scrollTop + clientHeight) < 50 && !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 vue-infinite-loading

vue-infinite-loading 是一个专门为 Vue 设计的无限滚动加载组件，简化了实现过程。

安装：

npm install vue-infinite-loading

使用：

vue实现滚动加载更多

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