elementUI 的el-dialog作为子组件，父组件如何控制其关闭的按钮

这里有三点需要说明：

1. 使用：before-close="closeHandle" 将其 $emit() 出去

2. 取消按钮 也需要$emeit出去

3. 控制对话框显示隐藏的变量需要props给父组件来传值，这个相当重要，不然控制不了对话框的显示隐藏

4.1,2步骤是为了在子组件不再重复操作显示隐藏的变量，vue会报错

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<template>   <el-dialog     title="选择设备"     width="1000px"     class="select-device-dialog"     v-model="dialogShow"     destroy-on-close     :close-on-click-modal="false"     :modal-orgend-to-body="false"     :append-to-body="true"     :before-close="handleClose"   >     <div class="dialog-box">       <div class="search-box">         <el-select           placeholder="请选择产品分类"           class="select-product-class"           v-model="searchForm.productClass"           multiple           clearable           collapse-tags           collapse-tags-tooltip           :max-collapse-tags="2"         >           <el-option label="小米产品" value="1" />           <el-option label="涂鸦产品" value="2" />           <el-option label="建大仁建" value="3" />           <el-option label="Modbus网关" value="4" />           <el-option label="通用产品" value="5" />         </el-select>         <el-select           placeholder="请选择产品"           class="select-product"           v-model="searchForm.product"           multiple           clearable           collapse-tags           collapse-tags-tooltip           :max-collapse-tags="2"         >           <el-option label="窗帘电机" value="1" />           <el-option label="人体存在传感器" value="2" />           <el-option label="三开开关" value="3" />           <el-option label="双开开关" value="4" />           <el-option label="单开开关" value="5" />           <el-option label="空调控制器" value="6" />           <el-option label="湿度传感器" value="7" />           <el-option label="温度传感器" value="8" />           <el-option label="通用产品" value="9" />         </el-select>         <el-select           placeholder="请选择设备组"           class="select-device-group"           v-model="searchForm.deviceGroup"           multiple           clearable           collapse-tags           collapse-tags-tooltip           :max-collapse-tags="3"         >           <el-option label="公共设备组" value="1" />         </el-select>         <el-input           v-model="searchForm.deviceName"           class="input-device"           placeholder="请输入设备名称"           clearable         />         <el-input           v-model="searchForm.deviceId"           class="input-device"           placeholder="请输入设备ID"           clearable         />         <div class="">           <span class="btn btn-deault" @click="search">查询</span>           <span class="btn btn-plain" @click="reset">重置</span>         </div>       </div>       <el-table style="width: 100%" max-height="300" :data="deviceList">         <el-table-column prop="deviceName" label="设备名称">           <template #default="{ row }">             <span class="orange-text" @click="selectDevice(row)">{{               row.deviceName             }}</span>           </template>         </el-table-column>         <el-table-column prop="deviceId" label="设备ID" />         <el-table-column prop="status" label="状态">           <template #default="{ row }">             <span v-if="row.status === '1'" style="color: #55bc8a">已启用</span>             <span v-else style="color: #f56c6c">已禁用</span>           </template>         </el-table-column>         <el-table-column prop="onLineStatus" label="在线状态" />         <el-table-column prop="describe" label="描述" />         <el-table-column prop="recentOnlineTime" label="最近在线时间" />         <el-table-column fixed="right" label="操作" width="100">           <template #default="{ row }">             <el-button link type="warning" @click="detailClick(row)"               >详情</el-button             >           </template>         </el-table-column>       </el-table>     </div>   </el-dialog> </template>   <script setup> import { ref, watch, computed, nextTick } from 'vue' import { useRouter } from 'vue-router' const router = useRouter() const props = defineProps({   isShow: {     type: Boolean,     default: false   } }) const searchForm = ref({   productClass: '',   product: '',   deviceGroup: '',   deviceName: '',   deviceId: '' })   const emits = defineEmits(['update:isShow', 'getDevice']) const dialogShow = computed({   get: () => props.isShow,   set: (value) => {     emits('update:isShow', value)   } })   const deviceList = ref([   {     id: '11',     deviceName: '会议室东窗帘',     deviceId: 'cl2',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   },   {     id: '12',     deviceName: '办公室开关',     deviceId: 'cl2',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   },   {     id: '13',     deviceName: '人体感应一',     deviceId: 'cl2',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   },   {     id: '14',     deviceName: '大会议室开关一',     deviceId: 'rt1',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   },   {     id: '15',     deviceName: '走廊开关一',     deviceId: 'switch6',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   },   {     id: '16',     deviceName: '餐厅三空调',     deviceId: 'kt6',     status: '1',     onLineStatus: '',     describe: '',     recentOnlineTime: ''   } ]) const selectDevice = (item) => {   if (item) {     emits('getDevice', item)   } } const search = () => {   console.log('search') } const reset = () => {   searchForm.value = {     productClass: '',     product: '',     deviceGroup: '',     deviceName: '',     deviceId: ''   } }   const handleClose = () => {   emits('getDevice', {}) } const detailClick = (row) => {   const newUrl = router.resolve({     name: 'entity-device'   })   window.open(newUrl.href, '_blank')   localStorage.setItem('deviceId', row.id) } </script>   <style lang="scss" scoped> .search-box {   display: flex;   flex-wrap: wrap;   .el-input,   .el-select {     width: 310px;     margin: 0 10px 10px 0;   }   .btn-deault {     margin-left: 0;   } } </style>   <style lang="scss"> .select-device-dialog {   .el-dialog__body {     padding-top: 3px;     padding-bottom: 20px;   } } </style>

父组件：

const getDevice = (item) => {

  selectDeviceVisible.value = false

  if (item.deviceName) {

    currentRow.value.device = item.deviceName

  }

}