useVirtualList

长列表虚拟化列表的 Hook

用于解决展示海量数据渲染时首屏渲染缓慢和滚动卡顿问题。

使用

<template>
  <div class="hello">
    <button
      style="margin-top: 30px"
      type="button"
      @click="handleVirtualScrollTo"
    >
      scroll to
    </button>
    <div
      :ref="containerProps.ref"
      @scroll="containerProps.onScroll"
      style="height: 300px; overflow: auto;border: 1px solid #cccccc"
    >
      <div :style="wrapperStyle">
        <div
          v-for="active in list"
          :key="active"
          style="
            height: 59px;
            border-bottom: 1px solid #cccccc;
            background-color: white;
          "
        >
          {{ active }}
        </div>
      </div>
    </div>
  </div>
</template>

<script lang="ts">
import { useVirtualList } from "v3hooks";

export default {
  props: {
    msg: String,
  },
  setup() {
    const { list, wrapperStyle, containerProps, scrollTo } = useVirtualList(
      Array.from(Array(99999).keys()),
      {
        itemHeight: 60,
        overscan: 10,
      }
    );

    const handleVirtualScrollTo = () => {
      scrollTo(22);
    };

    return {
      list,
      wrapperStyle,
      containerProps,
      handleVirtualScrollTo,
    };
  },
};
</script>

useVirtualList接受一个数组，导出一个虚拟化的list以元素配置，具体配置看Api

useVirtualList

使用

Api

Params

Options

Result