fix：修改详情页面报错的问题

nezha-fronted/src/components/page/alert/alertRule.vue

@@ -251,7 +251,7 @@ export default {
       },
       searchTime: bus.getTimezontDateRange(),
       needAlertDaysData: true,
-      trendKey: 'ruleId',
+      trendKey: 'ruleId'
     }
   },
   methods: {
@@ -290,9 +290,9 @@ export default {
           if (this.needAlertDaysData) {
             response.data.list.forEach(item => {
               item.trendLoading = true
-              item.left= 0
-              item.top= 0
-              item.alertNumtooltipShow= false
+              item.left = 0
+              item.top = 0
+              item.alertNumtooltipShow = false
               item.alertDaysData = [
                 {
                   metric: { priority: 'P1' },
@@ -320,7 +320,7 @@ export default {
           this.detailViewRightObj = detailViewRightObj
           this.pageObj.total = response.data.total
           this.pageObj.pages = response.data.pages
-          if (!this.scrollbarWrap) {
+          if (!this.scrollbarWrap && this.$refs.dataTable && this.$refs.dataTable.$refs.dataTable) {
             this.$nextTick(() => {
               this.scrollbarWrap = this.$refs.dataTable.$refs.dataTable.bodyWrapper
               this.toTopBtnHandler(this.scrollbarWrap)