Fixed: API not loaded the first time (#2424)

Author: malincrist

src/components/apis/details-of-api/ko/runtime/api-details.ts

@@ -44,15 +44,15 @@ export class ApiDetails {
     @OnMounted()
     public async initialize(): Promise<void> {
         const apiName = this.routeHelper.getApiName();
-
+        this.router.addRouteChangeListener(this.onRouteChange);
+        
         if (!apiName) {
             return;
         }
 
         this.selectedApiName(apiName);
         await this.loadApi(apiName);
 
-        this.router.addRouteChangeListener(this.onRouteChange);
         this.currentApiVersion.subscribe(this.onVersionChange);
         this.downloadSelected.subscribe(this.onDownloadChange);
     }