message error log

public/index.html

@@ -13,6 +13,16 @@
       <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
     </noscript>
     <div id="app"></div>
+  <script>
+    
+    window.addEventListener('beforeunload',function(event){
+      alert('')
+      console.log('aa',event)
+    })
+    //   window.onbeforeunload = function (e) {
+    //   alert('')
+    //  }
+  </script>
     <!-- built files will be auto injected -->
   </body>
 </html>

src/service/CameraService.ts

@@ -2,7 +2,8 @@ import { responseData } from "@/types/response"
 import NetUtil from '@/utils/http'
 import api from '@/configs/apiConfig'
 import { TrackData } from "@/components/MyVideo/data";
-import { getItem, setItem, clear } from '@/utils/indexdbHelper'
+import { getItem, setItem } from '@/utils/indexdbHelper'
+import { Message } from 'element-ui'
 
 export function getCamera(pageData: any): Promise<responseData> {
   return NetUtil.fetch_request('camera/paging', 'POST', pageData)
@@ -96,7 +97,7 @@ export async function addTrackData(dog, player) {
     setItem(dog.labelFileName, { dogIds, trackData })
     player.onTrackDataChange(dogIds, trackData, dog.id);
   } catch (err) {
-    this.$message.error("下载标识文件失败");
+    Message.error("下载标识文件失败");
     console.log(
       `%c-下载标识文件失败:${err}`,
       "color: red; background: yellow;"