vxe-table 复杂渲染虚拟滚动白屏的官方解决方案

官网文档：https://vxetable.cn

使用 v4.7+ 与3.9+ 大幅提升虚拟滚动渲染性能，虚拟滚动白屏是由于单元格的渲染比较复杂，耗时比较久，渲染跟不上导致滚动期间可能会出现空白。建议是避免在单元格中使用重度的组件，同步执行耗时太久的组件。

接下测一下看看官方的虚拟滚动，测一下渲染。

加载性能

以下是试用 4.7+ 的版本做了测试。

使用了毕竟复杂的左右冻结列以及100列、和复杂一些渲染。\
5万行在 300 毫秒以内

代码

<template>
  <div>
    <vxe-button @click="loadData(5000)">加载5k条</vxe-button>
    <vxe-button @click="loadData(10000)">加载1w条</vxe-button>
    <vxe-button @click="loadData(50000)">加载5w条</vxe-button>
    <vxe-grid v-bind="gridOptions">
      <template #action>
        <vxe-button mode="text" status="primary">按钮1</vxe-button>
        <vxe-button mode="text" status="error">按钮2</vxe-button>
      </template>
    </vxe-grid>
  </div>
</template>

<script setup>
import { reactive, nextTick } from 'vue'
import { VxeUI } from 'vxe-table'
const flag1CellRender = reactive({
  name: 'VxeSwitch'
})
const imgUrlCellRender = reactive({
  name: 'VxeImage',
  props: {
    width: 36,
    height: 36
  }
})
const imgList1CellRender = reactive({
  name: 'VxeUpload',
  props: {
    mode: 'image',
    readonly: true,
    moreConfig: {
      maxCount: 2
    },
    imageStyle: {
      width: 40,
      height: 40
    }
  }
})
const gridOptions = reactive({
  border: true,
  showOverflow: true,
  showHeaderOverflow: true,
  showFooterOverflow: true,
  loading: false,
  height: 800,
  columnConfig: {
    resizable: true
  },
  scrollX: {
    enabled: true,
    gt: 0
  },
  scrollY: {
    enabled: true,
    gt: 0,
    mode: 'wheel'
  },
  columns: [
    { type: 'checkbox', width: 60, fixed: 'left' },
    { title: '列0', field: 'col0', width: 100, fixed: 'left' },
    { title: '列1', field: 'imgUrl', width: 80, fixed: 'left', cellRender: imgUrlCellRender },
    { title: '列2', field: 'col2', width: 90 },
    { title: '列3', field: 'col3', width: 200 },
    { title: '列4', field: 'col4', width: 140 },
    { title: '列5', field: 'col5', width: 300 },
    { title: '列6', field: 'col6', width: 160 },
    { title: '列7', field: 'col7', width: 120 },
    { title: '列8', field: 'col8', width: 400 },
    { title: '列9', field: 'col9', width: 160 },
    { title: '列10', field: 'col10', width: 160 },
    { title: '列11', field: 'col11', width: 180 },
    { title: '列12', field: 'col12', width: 160 },
    { title: '列13', field: 'col13', width: 80 },
    { title: '列14', field: 'col14', width: 120 },
    { title: '列15', field: 'col15', width: 360 },
    { title: '列16', field: 'col16', width: 150 },
    { title: '列17', field: 'col17', width: 380 },
    { title: '列18', field: 'col18', width: 100 },
    { title: '列19', field: 'col19', width: 290 },
    { title: '列20', field: 'col20', width: 80 },
    { title: '列21', field: 'col21', width: 100 },
    { title: '列22', field: 'col22', width: 120 },
    { title: '列23', field: 'col23', width: 270 },
    { title: '列24', field: 'col24', width: 330 },
    { title: '列25', field: 'col25', width: 460 },
    { title: '列26', field: 'col26', width: 280 },
    { title: '列27', field: 'col27', width: 220 },
    { title: '列28', field: 'col28', width: 120 },
    { title: '列29', field: 'col29', width: 180 },
    { title: '列30', field: 'col30', width: 500 },
    { title: '列31', field: 'col31', width: 600 },
    { title: '列32', field: 'col32', width: 100 },
    { title: '列33', field: 'col33', width: 490 },
    { title: '列34', field: 'col34', width: 100 },
    { title: '列35', field: 'col35', width: 150 },
    { title: '列36', field: 'col36', width: 800 },
    { title: '列37', field: 'col37', width: 400 },
    { title: '列38', field: 'col38', width: 800 },
    { title: '列39', field: 'col39', width: 360 },
    { title: '列40', field: 'col40', width: 420 },
    { title: '列41', field: 'col41', width: 100 },
    { title: '列42', field: 'col42', width: 120 },
    { title: '列43', field: 'col43', width: 280 },
    { title: '列44', field: 'col44', width: 170 },
    { title: '列45', field: 'col45', width: 370 },
    { title: '列46', field: 'col46', width: 420 },
    { title: '列47', field: 'col47', width: 170 },
    { title: '列48', field: 'col48', width: 400 },
    { title: '列49', field: 'col49', width: 220 },
    { title: '列50', field: 'col50', width: 170 },
    { title: '列51', field: 'col51', width: 160 },
    { title: '列52', field: 'col52', width: 500 },
    { title: '列53', field: 'col53', width: 280 },
    { title: '列54', field: 'col54', width: 170 },
    { title: '列55', field: 'col55', width: 370 },
    { title: '列56', field: 'col56', width: 120 },
    { title: '列57', field: 'col57', width: 170 },
    { title: '列58', field: 'col58', width: 400 },
    { title: '列59', field: 'col59', width: 220 },
    { title: '列60', field: 'col60', width: 650 },
    { title: '列61', field: 'col61', width: 600 },
    { title: '列62', field: 'col62', width: 100 },
    { title: '列63', field: 'col63', width: 490 },
    { title: '列64', field: 'col64', width: 100 },
    { title: '列65', field: 'col65', width: 150 },
    { title: '列66', field: 'col66', width: 800 },
    { title: '列67', field: 'col67', width: 400 },
    { title: '列68', field: 'col68', width: 800 },
    { title: '列69', field: 'col69', width: 360 },
    { title: '列70', field: 'col70', width: 650 },
    { title: '列71', field: 'col71', width: 600 },
    { title: '列72', field: 'col72', width: 100 },
    { title: '列73', field: 'col73', width: 490 },
    { title: '列74', field: 'col74', width: 100 },
    { title: '列75', field: 'col75', width: 150 },
    { title: '列76', field: 'col76', width: 800 },
    { title: '列77', field: 'col77', width: 400 },
    { title: '列78', field: 'col78', width: 800 },
    { title: '列79', field: 'col79', width: 360 },
    { title: '列80', field: 'col80', width: 650 },
    { title: '列81', field: 'col81', width: 600 },
    { title: '列82', field: 'col82', width: 100 },
    { title: '列83', field: 'col83', width: 490 },
    { title: '列84', field: 'col84', width: 100 },
    { title: '列85', field: 'col85', width: 150 },
    { title: '列86', field: 'col86', width: 800 },
    { title: '列87', field: 'col87', width: 400 },
    { title: '列88', field: 'col88', width: 800 },
    { title: '列89', field: 'col89', width: 360 },
    { title: '列90', field: 'col90', width: 650 },
    { title: '列91', field: 'col91', width: 600 },
    { title: '列92', field: 'col92', width: 100 },
    { title: '列93', field: 'col93', width: 490 },
    { title: '列94', field: 'col94', width: 100 },
    { title: '列95', field: 'col95', width: 150 },
    { title: '列96', field: 'col96', width: 800 },
    { title: '列97', field: 'col97', width: 400 },
    { title: '列99', field: 'imgList1', width: 120, fixed: 'right', cellRender: imgList1CellRender },
    { title: '列100', field: 'flag1', width: 100, fixed: 'right', cellRender: flag1CellRender },
    { title: '操作', field: 'action', width: 120, fixed: 'right', slots: { default: 'action' } }
  ],
  data: []
})
// 模拟行数据
const loadData = (rowSize) => {
  gridOptions.loading = true
  setTimeout(() => {
    const dataList = []
    for (let i = 0; i < rowSize; i++) {
      const item = {
        id: 10000 + i,
        imgUrl: i % 3 === 0 ? 'https://vxeui.com/resource/img/546.gif' : 'https://vxeui.com/resource/img/673.gif',
        imgList1: i % 4 === 0
          ? [
              { name: 'fj577.jpg', url: 'https://vxeui.com/resource/img/fj577.jpg' }
            ]
          : [
              { name: 'fj573.jpeg', url: 'https://vxeui.com/resource/img/fj573.jpeg' },
              { name: 'fj562.png', url: 'https://vxeui.com/resource/img/fj562.png' }
            ],
        flag1: i % 5 === 0
      }
      for (let j = 0; j < 120; j++) {
        item[`col${j}`] = `值_${i}_${j}`
      }
      dataList.push(item)
    }
    const startTime = Date.now()
    gridOptions.data = dataList
    gridOptions.loading = false
    nextTick(() => {
      VxeUI.modal.message({
        content: `加载时间 ${Date.now() - startTime} 毫秒`,
        status: 'success'
      })
    })
  }, 100)
}
loadData(200)

</script>

试了一下滚动非常流畅，丝滑滚动。

github\
gitee