Vue 自适应高度表格的实现方法

import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event'

 // 设置表格高度
 const doResize = async(el, binding, vnode) => {
 // 获取表格Dom对象
 const { componentInstance: $table } = await vnode
 // 获取调用传递过来的数据 
 const { value } = binding

 if (!$table.height) {
  throw new Error(`el-$table must set the height. Such as height='100px'`)
 }
 // 获取距底部距离（用于展示页码等信息）
 const bottomOffset = (value && value.bottomOffset) || 30

 if (!$table) return

 // 计算列表高度并设置
 const height = window.innerHeight - el.getBoundingClientRect().top - bottomOffset
 $table.layout.setHeight(height)
 $table.doLayout()
}

export default {  
  // 初始化设置
  bind(el, binding, vnode) { 
    // 设置resize监听方法
    el.resizeListener = async() => { 
      await doResize(el, binding, vnode)
    }    
    // 绑定监听方法到addResizeListener
    addResizeListener(window.document.body, el.resizeListener)  
  },  
  // 绑定默认高度
  async inserted(el, binding, vnode) { 
    await doResize(el, binding, vnode)  
  },  
  // 销毁时设置
  unbind(el) { 
    // 移除resize监听
    removeResizeListener(el, el.resizeListener)  
  }
}

import adaptive from './adaptive'

const install = function(Vue) {   
  // 绑定v-adaptive指令
  Vue.directive('adaptive', adaptive)
}

if (window.Vue) {
  window['adaptive'] = adaptive  
  // eslint-disable-next-line no-undef 
  Vue.use(install)
}

adaptive.install = install

export default adaptive

import adaptive from '@/directive/el-table'
export default { 
  name：'Test',
  directives: { adaptive }，
  ... ...
}

<el-table  
  ref="table"
  // 自定义指令，bottomOffset 代表距离底部的距离
  v-adaptive="{bottomOffset: 85}"
  // 高度属性，100无具体意义，仅为初始值，不可省略
  height="100px" 
 >
 ... ...
 </table>

import adaptive from './directive/el-table'

Vue.use(adaptive)