diff --git a/api/@internal/component/ets/web.d.ts b/api/@internal/component/ets/web.d.ts
index 00ea08058bd91a4fa420842b21ab366ef332c261..6d9dceef93bc4a04e684f6752d51f482e9b75e14 100644
--- a/api/@internal/component/ets/web.d.ts
+++ b/api/@internal/component/ets/web.d.ts
@@ -309,6 +309,12 @@ declare class WebAttribute extends CommonMethod<WebAttribute> {
    */
   onHttpErrorReceive(callback: (event?: {request: WebResourceRequest, error: WebResourceError}) => void): WebAttribute;
 
+  /**
+   * Triggered when download start
+   * @since 8
+   */
+  onDownloadStart(callback: (event?: {url: string, userAgent: string, contentDisposition: string, mimetype: string, contentLength: number}) => void): WebAttribute;
+
   /**
    * Just use for genetate tsbundle
    * @ignore ide should ignore this arrtibute