diff --git a/api/arkui/component/lazyForEach.d.ets b/api/arkui/component/lazyForEach.d.ets
index c454f744d4111ebb9fcd0d2517f1d5a9e95d1f26..7dc46891dd2110137a24508018bfa1c2cb12b703 100644
--- a/api/arkui/component/lazyForEach.d.ets
+++ b/api/arkui/component/lazyForEach.d.ets
@@ -571,44 +571,43 @@ export interface IDataSource<T> {
     /**
      * Total data count.
      *
-     * @returns { number }
+     * @type { function }
      * @syscap SystemCapability.ArkUI.ArkUI.Full
      * @crossplatform
      * @atomicservice
      * @since 20
      */
-    totalCount(): number;
+    totalCount: () => number;
     /**
      * Return the data of index.
      *
-     * @param { number } index
-     * @returns { any }
+     * @type { function }
      * @syscap SystemCapability.ArkUI.ArkUI.Full
      * @crossplatform
      * @atomicservice
      * @since 20
      */
-    getData(index: number): T;
+    getData: (index: number) => T;
     /**
      * Register data change listener.
      *
-     * @param { DataChangeListener } listener
+     * @type { function }
      * @syscap SystemCapability.ArkUI.ArkUI.Full
      * @crossplatform
      * @atomicservice
      * @since 20
      */
-    registerDataChangeListener(listener: DataChangeListener): void;
+    registerDataChangeListener: (listener: DataChangeListener) => void;
     /**
      * Unregister data change listener.
      *
-     * @param { DataChangeListener } listener
+     * @type { function }
      * @syscap SystemCapability.ArkUI.ArkUI.Full
      * @crossplatform
      * @atomicservice
      * @since 20
      */
-    unregisterDataChangeListener(listener: DataChangeListener): void;
+    unregisterDataChangeListener: (listener: DataChangeListener) => void;
 }
 
 /**