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el-table-virtual-scroll-next

v1.0.2

Published

The virtual scrolling component developed based on the Table component of Element-Plus supports dynamic height and solves the problem of scrolling stuck when the amount of data is large.

Downloads

97

Readme

el-table-virtual-scroll-next

基于Element-Plus的Table 组件开发的虚拟滚动组件,支持动态高度,解决数据量大时滚动卡顿的问题。

⚠️优先考虑使用 Element-Plus 表格虚拟滚动组件 <el-table-v2>

⚠️仅支持 Vue3。(Vue2版本 点这里

demo & 源码:https://xiaocheng555.github.io/el-table-virtual-scroll-next/

安装

$ npm i el-table-virtual-scroll-next -S

用法

<virtual-scroll
  :data="list"
  :item-size="62"
  key-prop="id"
  @change="(renderData) => virtualList = renderData">
  <el-table 
    row-key="id" 
    :data="virtualList" 
    height="500px">
  </el-table>
</virtual-scroll>
...

import VirtualScroll from 'el-table-virtual-scroll-next'

export default {
  component: {
    VirtualScroll
  },
  data () {
    list: [
      {
        id: 1,
        text: 'content'
      },
      // ...... 省略n条
      {
        id: 2000,
        text: 'content2'
      }
    ],
    virtualList: []
  }
}

el-table-virtual-scroll 组件注意事项

  • 使用组件前,请确保项目中有引入 element-plus 组件库。

  • <el-table> 组件最好写上 row-key 属性,能避免一些奇怪的问题。例:<el-table row-key="id">,其中id为数据中唯一key值。

  • 不支持 Element-Plus Table 原有单选、多选、扩展行、索引,请使用 <virtual-column> 做兼容,详见demo。

  • 使用 Element-Plus Table 排序时,需要做额外兼容,详见demo。

el-table-virtual-scroll 组件升级到vue3的不同

  • 不支持扩展行使用 <virtual-column type="expand">,详见demo。

  • scrollBox 属性不支持自动查找滚动容器,必须指定滚动容器的css选择器,如果未指定滚动容器,则默认表格内滚动。

  • 如果传入 data 数据更改了,而视图上表格未发生变化,请调用 update 方法更新视图。

el-table-virtual-scroll 组件

Props

| 参数 | 说明 | 类型 | 可选值 | 默认值 | |---------- |-------------- |---------- |-------------------------------- |-------- | | data | 总数据 | Array | 必填 | | | keyProp | key值,data数据中的唯一id【⚠️若keyProp未设置或keyProp值不唯一,可能导致表格空数据或者滚动时渲染的数据断层、不连贯】 | string | — | id | | itemSize | 每一行的预估高度 | number | — | 60 | | scrollBox | 指定滚动容器;如果未指定滚动容器,则默认表格内滚动 | string | 'window'、css选择器 | - | | buffer | 顶部和底部缓冲区域,值越大显示表格的行数越多 | Number | — | 200 | | throttleTime | 滚动事件的节流时间 | number | — | 10 | | dynamic | 动态获取表格行高度,默认开启。设置为false时,则以itemSize为表格行的真实高度,能大大减少虚拟滚动计算量,减少滚动白屏;如果itemSize与表格行的真实高度不一致,可能导致滚动时表格数据错乱 | boolean | — | true | | virtualized | 是否开启虚拟滚动 | boolean | — | true |

Methods

| 方法名 | 说明 | 参数 | |---------- |-------- |---------- | | scrollTo | 滚动到第几行 | index | | update | 更新,会重新计算实际渲染数据和位置 | - | | reset | 重置 | - | | clearSelection | 用于多选 <virtual-column type="selection">,清空用户的选择 | - | | toggleRowSelection | 用于多选 <virtual-column type="selection">, 切换某一行的选中状态,如果使用了第二个参数,则是设置这一行选中与否(selected 为 true 则选中) | row, selected | | setCurrentRow | 用于单选 <virtual-column type="radio">, 设定某一行为选中行 | row |

Events

| 事件名称 | 说明 | 参数 | |---------- |-------- |---------- | | change | 计算完成真实显示的表格行数 | (renderData, start, end):renderData 真实渲染的数据,start和end指的是渲染的数据在总数据的开始到结束的区间范围 | | current-change | 虚拟表格单选选中事件 | currentRow | | selection-change | 虚拟表格多选选项发生更改时触发事件 | selectedRows |

virtual-column 组件

使用 <el-table-virtual-scroll> 做表格虚拟滚动,是不支持 Element-Plus 表格的原有的索引、单选、多选、扩展行等功能,需要使用 <virtual-column> 来兼容。<virtual-column> 组件内封装了 <el-table-column>,支持传入 <el-table-column> 组件的props属性。 其中 <virtual-column> 会在表格row数据上扩展 $v_checked$v_expanded ... 等属性,请悉知。

更多demo & 源码查看:https://xiaocheng555.github.io/el-table-virtual-scroll-next/

引入

import { VirtualColumn } from 'el-table-virtual-scroll-next'

...

<virtual-column type="index/selection/radio/tree"></virtual-column>

Props

| 参数 | 说明 | 类型 | 可选值 | 默认值 | |---------- |-------------- |---------- |-------------------------------- |-------- | | * | 支持 <el-table-column> 组件的props属性,如label, fixed, prop, width, min-width, index 等等 | - | — | - | | type | type="index" 为索引;type="selection" 为多选;type="radio" 为单选;type="tree" 为模拟树结构 | String | 选填 | | | indent | 展示树形数据时,树节点的缩进,type 为 tree 时生效 | Number | — | 16 | | load | 加载子节点数据的函数,type 为 tree 时生效 | Function(row, resolve) | — | - |

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