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vue实现更多加载

2026-01-23 00:31:51VUE

Vue实现更多加载功能

在Vue中实现更多加载（无限滚动或分页加载）功能，可以通过监听滚动事件或使用Intersection Observer API来实现。以下是两种常见的方法：

监听滚动事件

通过监听滚动事件，判断是否滚动到底部，触发加载更多数据。

<template>
  <div class="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,
    };
  },
  mounted() {
    this.fetchData();
  },
  methods: {
    handleScroll(event) {
      const container = event.target;
      const scrollBottom = container.scrollHeight - container.scrollTop - container.clientHeight;
      if (scrollBottom < 50 && !this.loading) {
        this.fetchData();
      }
    },
    fetchData() {
      this.loading = true;
      // 模拟API调用
      setTimeout(() => {
        const newItems = Array.from({ length: 10 }, (_, i) => ({
          id: this.items.length + i,
          content: `Item ${this.items.length + i}`,
        }));
        this.items = [...this.items, ...newItems];
        this.page++;
        this.loading = false;
      }, 1000);
    },
  },
};
</script>

<style>
.container {
  height: 300px;
  overflow-y: auto;
  border: 1px solid #ccc;
}
</style>

使用Intersection Observer API

Intersection Observer API更高效，适合现代浏览器。

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

<script>
export default {
  data() {
    return {
      items: [],
      loading: false,
      page: 1,
      observer: null,
    };
  },
  mounted() {
    this.fetchData();
    this.observer = new IntersectionObserver((entries) => {
      if (entries[0].isIntersecting && !this.loading) {
        this.fetchData();
      }
    });
    this.observer.observe(this.$refs.loader);
  },
  beforeDestroy() {
    this.observer.disconnect();
  },
  methods: {
    fetchData() {
      this.loading = true;
      setTimeout(() => {
        const newItems = Array.from({ length: 10 }, (_, i) => ({
          id: this.items.length + i,
          content: `Item ${this.items.length + i}`,
        }));
        this.items = [...this.items, ...newItems];
        this.page++;
        this.loading = false;
      }, 1000);
    },
  },
};
</script>

使用第三方库

可以使用第三方库如vue-infinite-loading简化实现。

安装：

npm install vue-infinite-loading

使用：

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

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

export default {
  components: {
    InfiniteLoading,
  },
  data() {
    return {
      items: [],
      page: 1,
    };
  },
  methods: {
    fetchData($state) {
      setTimeout(() => {
        const newItems = Array.from({ length: 10 }, (_, i) => ({
          id: this.items.length + i,
          content: `Item ${this.items.length + i}`,
        }));
        this.items = [...this.items, ...newItems];
        this.page++;
        $state.loaded();
        if (this.page > 5) {
          $state.complete();
        }
      }, 1000);
    },
  },
};
</script>