diff --git a/en/application-dev/reference/apis/js-apis-stationary.md b/en/application-dev/reference/apis/js-apis-stationary.md index bd7c29020ed3d0b65501421c4b9547423986fdf9..e05d0be7fb9f7e3a8329f28c1fc54c1d2a45ca63 100644 --- a/en/application-dev/reference/apis/js-apis-stationary.md +++ b/en/application-dev/reference/apis/js-apis-stationary.md @@ -123,7 +123,7 @@ Unsubscribes from the device status. | -------------------- | -------------------------------------------------- | ---- | ---------------------------- | | activity | [ActivityType](#activitytype) | Yes | Device status type. | | event | [ActivityEvent](#activityevent) | Yes | Event type. | -| callback | Callback<[ActivityResponse](#activityresponse)\> | No | Callback used to receive reported data. | +| callback | Callback<[ActivityResponse](#activityresponse)\> | No | Callback used to receive reported data, if the callback parameter is not passed, all callbacks subscribed to this type under this process will be removed. | **Example** diff --git a/zh-cn/application-dev/reference/apis/js-apis-stationary.md b/zh-cn/application-dev/reference/apis/js-apis-stationary.md index e4c3ad1ac1ca278f18abda61c3b2b9d41d881c84..b14f185bf3103fc58c2f37cbfa4f434e644c73fc 100644 --- a/zh-cn/application-dev/reference/apis/js-apis-stationary.md +++ b/zh-cn/application-dev/reference/apis/js-apis-stationary.md @@ -123,7 +123,7 @@ off(activity: ActivityType, event: ActivityEvent, callback?: Callback<Activit | -------------------- | -------------------------------------------------- | ---- | ---------------------------- | | activity | [ActivityType](#activitytype) | 是 | 设备状态能力类型。 | | event | [ActivityEvent](#activityevent) | 是 | 事件类型。 | -| callback | Callback<[ActivityResponse](#activityresponse)\> | 否 | 回调函数，接收上报状态变化事件。 | +| callback | Callback<[ActivityResponse](#activityresponse)\> | 否 | 回调函数，接收上报状态变化事件，如果没有传递callback参数，会移除该进程下订阅该类型得所有callback。 | **示例：**