1、报警历史下拉清除

industry-admin/src/views/alarm/alarmHistory/index.vue

@@ -12,7 +12,7 @@
                 <el-input v-model="queryParams.alarmText" placeholder="请输入报警文本" />
             </el-form-item>
             <el-form-item label="报警级别" prop="alarmType">
-                <el-select v-model="queryParams.alarmType">
+                <el-select v-model="queryParams.alarmType" clearable>
                     <el-option v-for="alarmType in alarmTypeList" :key="alarmType" :label="alarmType"
                         :value="alarmType">
                     </el-option>