diff --git a/en/application-dev/notification/notification-with-wantagent.md b/en/application-dev/notification/notification-with-wantagent.md
index 4a820360cc5f5f1c4ca829a629636dac0a672371..72e845497eac1cff153ebd7bf9d9af069b1bab6f 100644
--- a/en/application-dev/notification/notification-with-wantagent.md
+++ b/en/application-dev/notification/notification-with-wantagent.md
@@ -40,7 +40,7 @@ For details about the APIs, see [@ohos.app.ability.wantAgent](../reference/apis/
    Scenario 1: Create a [WantAgentInfo](../reference/apis/js-apis-inner-wantAgent-wantAgentInfo.md) object for starting a UIAbility component.
 
    ```typescript
-   let wantAgentObj:WantAgent = null; // Save the WantAgent object created. It will be used to complete the trigger operations.
+   let wantAgentObj:WantAgent; // Save the WantAgent object created. It will be used to complete the trigger operations.
    
    // Set the action type through operationType of WantAgentInfo.
    let wantAgentInfo:wantAgent.WantAgentInfo = {
@@ -64,7 +64,7 @@ For details about the APIs, see [@ohos.app.ability.wantAgent](../reference/apis/
    Scenario 2: Create a [WantAgentInfo](../reference/apis/js-apis-inner-wantAgent-wantAgentInfo.md) object for publishing a [common event](../application-models/common-event-overview.md).
 
    ```typescript
-   let wantAgentObj:WantAgent = null; // Save the WantAgent object created. It will be used to complete the trigger operations.
+   let wantAgentObj:WantAgent; // Save the WantAgent object created. It will be used to complete the trigger operations.
    
    // Set the action type through operationType of WantAgentInfo.
    let wantAgentInfo:wantAgent.WantAgentInfo = {
diff --git a/en/application-dev/reference/apis/js-apis-commonEventManager.md b/en/application-dev/reference/apis/js-apis-commonEventManager.md
index 070fee6a9381edfea0ceaf7758b01f41a137b861..1754dc36d54e935f38b617be757528f45c7fcd17 100644
--- a/en/application-dev/reference/apis/js-apis-commonEventManager.md
+++ b/en/application-dev/reference/apis/js-apis-commonEventManager.md
@@ -60,7 +60,8 @@ function publishCB(err:Base.BusinessError) {
 // Publish a common event.
 try {
     CommonEventManager.publish("event", publishCB);
-} catch(err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publish failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -114,7 +115,8 @@ function publishCB(err:Base.BusinessError) {
 // Publish a common event.
 try {
     CommonEventManager.publish("event", options, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publish failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -166,7 +168,8 @@ let userId = 100;
 // Publish a common event.
 try {
     CommonEventManager.publishAsUser("event", userId, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publishAsUser failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -226,7 +229,8 @@ let userId = 100;
 // Publish a common event.
 try {
     CommonEventManager.publishAsUser("event", userId, options, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publishAsUser failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -269,7 +273,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
 // Create a subscriber.
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -366,7 +371,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
         // Subscribe to a common event.
         try {
             CommonEventManager.subscribe(subscriber, SubscribeCB);
-        } catch (err) {
+        } catch (error) {
+            let err:Base.BusinessError = error as Base.BusinessError;
             console.error(`subscribe failed, code is ${err.code}, message is ${err.message}`);
         }
     } else {
@@ -377,7 +383,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
 // Create a subscriber.
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -433,7 +440,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
         // Subscribe to a common event.
         try {
             CommonEventManager.subscribe(subscriber, subscribeCB);
-        } catch(err) {
+        } catch (error) {
+            let err:Base.BusinessError = error as Base.BusinessError;
             console.error(`subscribe failed, code is ${err.code}, message is ${err.message}`);
         }
     }
@@ -449,14 +457,16 @@ function unsubscribeCB(err:Base.BusinessError) {
 // Create a subscriber.
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 
 // Unsubscribe from the common event.
 try {
     CommonEventManager.unsubscribe(subscriber, unsubscribeCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`unsubscribe failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -583,7 +593,7 @@ CommonEventManager.setStaticSubscriberState(true, (err:Base.BusinessError) => {
         console.info(`Set static subscriber state callback failed, err is null.`);
         return;
     }
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.info(`Set static subscriber state callback failed, errCode: ${err.code}, errMes: ${err.message}`);
         return;
     }
diff --git a/en/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md b/en/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
index cc3d507ee9d208bc66571ca56daf1cf518c3d5fe..f0d740a85d874d643838135e2bc83232ab86a62d 100644
--- a/en/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
+++ b/en/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
@@ -21,7 +21,7 @@ let subscribeInfo:CommonEventManager.CommonEventSubscribeInfo = {
 
 // Callback for subscriber creation.
 function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManager.CommonEventSubscriber) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`createSubscriber failed, code is ${err.code}`);
     } else {
         console.info("createSubscriber");
@@ -52,7 +52,7 @@ Obtains the code of this common event. This API uses an asynchronous callback to
 ```ts
 // Callback for result code obtaining of an ordered common event.
 function getCodeCB(err:Base.BusinessError, code:number) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("getCode " + JSON.stringify(code));
@@ -105,7 +105,7 @@ Sets the code for this common event. This API uses an asynchronous callback to r
 ```ts
 // Callback for result code setting of an ordered common event.
 function setCodeCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setCode");
@@ -163,7 +163,7 @@ Obtains the data of this common event. This API uses an asynchronous callback to
 ```ts
 // Callback for result data obtaining of an ordered common event.
 function getDataCB(err:Base.BusinessError, data:string) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getData failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("getData " + JSON.stringify(data));
@@ -216,7 +216,7 @@ Sets the data for this common event. This API uses an asynchronous callback to r
 ```ts
 // Callback for result data setting of an ordered common event
 function setDataCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setData");
@@ -276,7 +276,7 @@ Sets the code and data for this common event. This API uses an asynchronous call
 ```ts
 // Callback for code and data setting of an ordered common event.
 function setCodeDataCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCodeAndData failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setCodeDataCallback");
@@ -335,7 +335,7 @@ Checks whether this common event is an ordered one. This API uses an asynchronou
 ```ts
 // Callback for checking whether the current common event is an ordered one.
 function isOrderedCB(err:Base.BusinessError, isOrdered:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`isOrderedCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("isOrdered " + JSON.stringify(isOrdered));
@@ -387,7 +387,7 @@ Checks whether this common event is a sticky one. This API uses an asynchronous
 ```ts
 // Callback for checking whether the current common event is a sticky one.
 function isStickyCB(err:Base.BusinessError, isSticky:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`isStickyCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("isSticky " + JSON.stringify(isSticky));
@@ -439,7 +439,7 @@ Aborts this common event. After the abort, the common event is not sent to the n
 ```ts
 // Callback for common event aborting.
 function abortCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
 		console.error(`abortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("abortCommonEvent");
@@ -491,7 +491,7 @@ Clears the aborted state of this common event. This API takes effect only for or
 ```ts
 // Callback for clearing the aborted state of the current common event.
 function clearAbortCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`clearAbortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("clearAbortCommonEvent");
@@ -543,7 +543,7 @@ Checks whether this common event is in the aborted state. This API takes effect
 ```ts
 // Callback for checking whether the current common event is in the aborted state.
 function getAbortCB(err:Base.BusinessError, abortEvent:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getAbortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("abortCommonEvent " + abortEvent)
@@ -595,7 +595,7 @@ Obtains the subscriber information. This API uses an asynchronous callback to re
 ```ts
 // Callback for subscriber information obtaining.
 function getCB(err:Base.BusinessError, subscribeInfo:CommonEventManager.CommonEventSubscribeInfo) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getSubscribeInfo failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("subscribeInfo " + JSON.stringify(subscribeInfo));
@@ -647,7 +647,7 @@ Finishes this common event. This API takes effect only for ordered common events
 ```ts
 // Callback for ordered common event finishing.
 function finishCB(err:Base.BusinessError) {
-  if (err.code) {
+  if (err.code !== undefined && err.code != null) {
     console.error(`finishCommonEvent failed, code is ${err.code}, message is ${err.message}`);
   } else {
     console.info("FinishCommonEvent");
diff --git a/zh-cn/application-dev/notification/notification-with-wantagent.md b/zh-cn/application-dev/notification/notification-with-wantagent.md
index 3cc82b5c38e202d22321874b1b31034fa43ae324..e187b37e95ca008b4f88689a6e53537732dfbf8b 100644
--- a/zh-cn/application-dev/notification/notification-with-wantagent.md
+++ b/zh-cn/application-dev/notification/notification-with-wantagent.md
@@ -39,7 +39,7 @@
    场景一：创建拉起UIAbility的WantAgent的[WantAgentInfo](../reference/apis/js-apis-inner-wantAgent-wantAgentInfo.md)信息。
 
    ```typescript
-   let wantAgentObj:WantAgent = null; // 用于保存创建成功的wantAgent对象，后续使用其完成触发的动作。
+   let wantAgentObj:WantAgent; // 用于保存创建成功的wantAgent对象，后续使用其完成触发的动作。
    
    // 通过WantAgentInfo的operationType设置动作类型
    let wantAgentInfo:wantAgent.WantAgentInfo = {
@@ -63,7 +63,7 @@
    场景二：创建发布[公共事件](../application-models/common-event-overview.md)的WantAgent的[WantAgentInfo](../reference/apis/js-apis-inner-wantAgent-wantAgentInfo.md)信息。
 
    ```typescript
-   let wantAgentObj:WantAgent = null; // 用于保存创建成功的WantAgent对象，后续使用其完成触发的动作。
+   let wantAgentObj:WantAgent; // 用于保存创建成功的WantAgent对象，后续使用其完成触发的动作。
    
    // 通过WantAgentInfo的operationType设置动作类型
    let wantAgentInfo:wantAgent.WantAgentInfo = {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-commonEventManager.md b/zh-cn/application-dev/reference/apis/js-apis-commonEventManager.md
index b9b9a51618bf6e950636f3f5b0ea84efd410bfcb..29ba3cd215d3369d31a5a3b24dd7d80287c31c85 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-commonEventManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-commonEventManager.md
@@ -60,7 +60,8 @@ function publishCB(err:Base.BusinessError) {
 //发布公共事件
 try {
     CommonEventManager.publish("event", publishCB);
-} catch(err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publish failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -114,7 +115,8 @@ function publishCB(err:Base.BusinessError) {
 //发布公共事件
 try {
     CommonEventManager.publish("event", options, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publish failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -166,7 +168,8 @@ let userId = 100;
 //发布公共事件
 try {
     CommonEventManager.publishAsUser("event", userId, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publishAsUser failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -226,7 +229,8 @@ let userId = 100;
 //发布公共事件
 try {
     CommonEventManager.publishAsUser("event", userId, options, publishCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`publishAsUser failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -269,7 +273,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
 //创建订阅者
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -345,7 +350,8 @@ let subscribeInfo = {
 //创建订阅者
 try {
     subscriber = CommonEventManager.createSubscriberSync(subscribeInfo);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriberSync failed, code is ${err.code}, message is ${err.message}`);
 }
 
@@ -404,7 +410,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
         //订阅公共事件
         try {
             CommonEventManager.subscribe(subscriber, SubscribeCB);
-        } catch (err) {
+        } catch (error) {
+            let err:Base.BusinessError = error as Base.BusinessError;
             console.error(`subscribe failed, code is ${err.code}, message is ${err.message}`);
         }
     } else {
@@ -415,7 +422,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
 //创建订阅者
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -471,7 +479,8 @@ function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManag
         //订阅公共事件
         try {
             CommonEventManager.subscribe(subscriber, subscribeCB);
-        } catch(err) {
+        } catch (error) {
+            let err:Base.BusinessError = error as Base.BusinessError;
             console.error(`subscribe failed, code is ${err.code}, message is ${err.message}`);
         }
     }
@@ -487,14 +496,16 @@ function unsubscribeCB(err:Base.BusinessError) {
 //创建订阅者
 try {
     CommonEventManager.createSubscriber(subscribeInfo, createCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`createSubscriber failed, code is ${err.code}, message is ${err.message}`);
 }
 
 //取消订阅公共事件
 try {
     CommonEventManager.unsubscribe(subscriber, unsubscribeCB);
-} catch (err) {
+} catch (error) {
+    let err:Base.BusinessError = error as Base.BusinessError;
     console.error(`unsubscribe failed, code is ${err.code}, message is ${err.message}`);
 }
 ```
@@ -621,7 +632,7 @@ CommonEventManager.setStaticSubscriberState(true, (err:Base.BusinessError) => {
         console.info(`Set static subscriber state callback failed, err is null.`);
         return;
     }
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.info(`Set static subscriber state callback failed, errCode: ${err.code}, errMes: ${err.message}`);
         return;
     }
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md b/zh-cn/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
index d9f1fbe39ccecae28723b12a8e05f4cdda8d1ef4..e8067cb831a4babe00b1b6df36ac235f1c12ec87 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-commonEvent-commonEventSubscriber.md
@@ -21,7 +21,7 @@ let subscribeInfo:CommonEventManager.CommonEventSubscribeInfo = {
 
 // 创建订阅者回调
 function createCB(err:Base.BusinessError, commonEventSubscriber:CommonEventManager.CommonEventSubscriber) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`createSubscriber failed, code is ${err.code}`);
     } else {
         console.info("createSubscriber");
@@ -52,7 +52,7 @@ getCode(callback: AsyncCallback\<number>): void
 ```ts
 //获取有序公共事件代码回调
 function getCodeCB(err:Base.BusinessError, code:number) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("getCode " + JSON.stringify(code));
@@ -126,7 +126,7 @@ setCode(code: number, callback: AsyncCallback\<void>): void
 ```ts
 //设置有序公共事件的代码回调
 function setCodeCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setCode");
@@ -210,7 +210,7 @@ getData(callback: AsyncCallback\<string>): void
 ```ts
 //获取有序公共事件代码数据回调
 function getDataCB(err:Base.BusinessError, data:string) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getData failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("getData " + JSON.stringify(data));
@@ -284,7 +284,7 @@ setData(data: string, callback: AsyncCallback\<void>): void
 ```ts
 //设置有序公共事件的结果数据回调
 function setDataCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCode failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setData");
@@ -367,7 +367,7 @@ setCodeAndData(code: number, data: string, callback:AsyncCallback\<void>): void
 ```ts
 //设置有序公共事件的代码和数据回调
 function setCodeDataCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`setCodeAndData failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("setCodeDataCallback");
@@ -453,7 +453,7 @@ isOrderedCommonEvent(callback: AsyncCallback\<boolean>): void
 ```ts
 //获取当前公共事件是否为有序事件的回调
 function isOrderedCB(err:Base.BusinessError, isOrdered:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`isOrderedCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("isOrdered " + JSON.stringify(isOrdered));
@@ -532,7 +532,7 @@ isStickyCommonEvent(callback: AsyncCallback\<boolean>): void
 ```ts
 //获取当前公共事件是否为粘性事件的回调
 function isStickyCB(err:Base.BusinessError, isSticky:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`isStickyCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("isSticky " + JSON.stringify(isSticky));
@@ -609,7 +609,7 @@ abortCommonEvent(callback: AsyncCallback\<void>): void
 ```ts
 //取消当前有序公共事件的回调
 function abortCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
 		console.error(`abortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("abortCommonEvent");
@@ -675,7 +675,7 @@ clearAbortCommonEvent(callback: AsyncCallback\<void>): void
 ```ts
 //清除当前公共事件取消状态的回调
 function clearAbortCB(err:Base.BusinessError) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`clearAbortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("clearAbortCommonEvent");
@@ -741,7 +741,7 @@ getAbortCommonEvent(callback: AsyncCallback\<boolean>): void
 ```ts
 //获取当前有序公共事件是否取消的回调
 function getAbortCB(err:Base.BusinessError, abortEvent:boolean) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getAbortCommonEvent failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("abortCommonEvent " + abortEvent)
@@ -814,7 +814,7 @@ getSubscribeInfo(callback: AsyncCallback\<CommonEventSubscribeInfo>): void
 ```ts
 //获取订阅者信息回调
 function getCB(err:Base.BusinessError, subscribeInfo:CommonEventManager.CommonEventSubscribeInfo) {
-    if (err.code) {
+    if (err.code !== undefined && err.code != null) {
         console.error(`getSubscribeInfo failed, code is ${err.code}, message is ${err.message}`);
     } else {
         console.info("subscribeInfo " + JSON.stringify(subscribeInfo));
@@ -887,7 +887,7 @@ finishCommonEvent(callback: AsyncCallback\<void>): void
 ```ts
 //结束当前有序公共事件的回调
 function finishCB(err:Base.BusinessError) {
-  if (err.code) {
+  if (err.code !== undefined && err.code != null) {
     console.error(`finishCommonEvent failed, code is ${err.code}, message is ${err.message}`);
   } else {
     console.info("FinishCommonEvent");