Loading

Angular PrimeNG TreeTable supports lazy loading of data. This is useful when the TreeTable has a large number of nodes that cannot be loaded all at once. Lazy loading allows the TreeTable to load data on demand when the user expands a node. This improves performance and speeds up the rendering time of the TreeTable.

To implement lazy loading in TreeTable, follow these steps:

1. Define the lazy loading function that will fetch data from the server.

loadLazy(event: LazyLoadEvent) {
   this.loading = true;
   setTimeout(() => {
      this.nodeService.getLazyFiles(event).subscribe(files => {
         this.files = files
         this.loading = false;
      });
   }, 1000);
}

2. Pass the lazy loading function to TreeTable component as a callback function.

3. Implement the getLazyFiles() function in the service that will fetch the data from the server.

getLazyFiles(event: LazyLoadEvent): Observable {
   return this.http.get(`${this.baseUrl}?first=${event.first}&rows=${event.rows}&sortField=${event.sortField}&sortOrder=${event.sortOrder}`)
         .pipe(
            map(res => res),
         );
}

With these steps, lazy loading in the TreeTable component is implemented. The TreeTable will now fetch data from the server as the user expands nodes in the TreeTable. This ensures that only the nodes required by the user are loaded, thereby improving performance and reducing the load time of the TreeTable. 免责声明：本文内容通过AI工具匹配关键字智能整合而成，仅供参考，火山引擎不对内容的真实、准确或完整作任何形式的承诺。如有任何问题或意见，您可以通过联系service@volcengine.com进行反馈，火山引擎收到您的反馈后将及时答复和处理。