fix bug

ruoyi-ui/src/views/JiHeExpressway/pages/Home/components/RoadAndEvents/utils/map.js

@@ -127,7 +127,7 @@ export class MarkerCluster {
       const startIndex = (page - 1) * pageSize;
       const endIndex = startIndex + pageSize;
       let num = (page - 1) * pageSize;
-      if (data.length === 0 || data.length === 1) {
+      if (!data || data.length === 0 || data.length === 1) {
         return this.infoWindow.close();
       }
       const { latitude: lat, longitude: lng } = data[0].extData;