modyfied bugs

Signed-off-by: Nbird_j <jianghongpeng@huawei.com>

zh-cn/application-dev/media/audio-recorder.md

@@ -39,7 +39,7 @@
 包含流程：创建实例，设置录制参数，录制音频，暂停录制，恢复录制，停止录制，释放资源等流程。
 
 ```js
-funfunction SetCallBack(audioRecorder) {
+function SetCallBack(audioRecorder) {
     audioRecorder.on('prepare', () => {              								// 设置'prepare'事件回调
         console.log('prepare success');    
         // 录制界面可切换至已准备好，可点击录制按钮进行录制
@@ -87,7 +87,7 @@ let audioRecorderConfig = {
     uri : 'file:///data/accounts/account_0/appdata/appdata/recorder/test.m4a',       // 文件需先由调用者创建，并给予适当的权限
     location : { latitude : 30, longitude : 130},
 }																					
-audioRecorder.prepare(audioRecorderConfig)
+audioRecorder.prepare(audioRecorderConfig);
 // 4.开始录制
 audioRecorder.start();                            	// 需等待'prepare'事件回调完成后，才可调用start进行录制，触发'start'事件回调
 // 5.暂停录制

zh-cn/application-dev/reference/apis/js-apis-media.md

@@ -1078,18 +1078,12 @@ getInputSurface(callback: AsyncCallback\<string>): void;
 
 ```js
 // asyncallback
-let surfaceId = null;
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('getInputSurface', () => {
-    videoRecorder.getInputSurface((err, surfaceId) => {
-        if (typeof (err) == 'undefined') {
-            console.info('getInputSurface success');
-        } else {
-            console.info('getInputSurface failed and error is ' + err.message);
-        }
-    });
+videoRecorder.getInputSurface((err, surfaceId) => {
+    if (typeof (err) == 'undefined') {
+        console.info('getInputSurface success');
+    } else {
+        console.info('getInputSurface failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1113,7 +1107,6 @@ getInputSurface(): Promise\<string>;
 
 ```js
 // promise
-let surfaceId = null;
 await videoRecorder.getInputSurface().then((surface) => {
     console.info('getInputSurface success');
     surfaceId = surface;
@@ -1142,17 +1135,12 @@ start(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('start', () => {
-    videoRecorder.start((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('start videorecorder success');
-        } else {
-            console.info('start videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.start((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('start videorecorder success');
+    } else {
+        console.info('start videorecorder failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1201,17 +1189,12 @@ pause(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('pause', () => {
-    videoRecorder.pause((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('pause videorecorder success');
-        } else {
-            console.info('pause videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.pause((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('pause videorecorder success');
+    } else {
+        console.info('pause videorecorder failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1258,17 +1241,12 @@ resume(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('resume', () => {
-    videoRecorder.resume((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('resume videorecorder success');
-        } else {
-            console.info('resume videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.resume((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('resume videorecorder success');
+    } else {
+        console.info('resume videorecorder failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1315,17 +1293,12 @@ stop(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('stop', () => {
-    videoRecorder.stop((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('stop videorecorder success');
-        } else {
-            console.info('stop videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.stop((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('stop videorecorder success');
+    } else {
+        console.info('stop videorecorder failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1372,17 +1345,12 @@ release(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('release', () => {
-    videoRecorder.release((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('release videorecorder success');
-        } else {
-            console.info('release videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.release((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('release videorecorder success');
+    } else {
+        console.info('release videorecorder failed and error is ' + err.message);
+    }
 });
 ```
 
@@ -1429,17 +1397,12 @@ reset(callback: AsyncCallback\<void>): void;
 
 ```js
 // asyncallback
-let events = require('events');
-let eventEmitter = new events.EventEmitter();
-
-eventEmitter.on('reset', () => {
-    videoRecorder.reset((err) => {
-        if (typeof (err) == 'undefined') {
-            console.info('reset videorecorder success');
-        } else {
-            console.info('reset videorecorder failed and error is ' + err.message);
-        }
-    });
+videoRecorder.reset((err) => {
+    if (typeof (err) == 'undefined') {
+        console.info('reset videorecorder success');
+    } else {
+        console.info('reset videorecorder failed and error is ' + err.message);
+    }
 });
 ```