add code type for md codes

Signed-off-by: Naqxyjay <zhangchunxin@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-battery-info.md

@@ -8,7 +8,7 @@
 
 ## 导入模块
 
-```
+```js
 import batteryInfo from '@ohos.batteryInfo';
 ```
 
@@ -32,7 +32,7 @@ SystemCapability.PowerManager.BatteryManager.Core
 | isBatteryPresent<sup>7+</sup> | boolean                                  | 是    | 否    | 表示当前设备是否支持电池或者电池是否在位。 |
 
 - 示例：
-  ```
+  ```js
   import batteryInfo from '@ohos.batteryInfo';
   var batterySoc = batteryInfo.batterySOC;
   ```

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

@@ -8,7 +8,7 @@
 
 ## 导入模块
 
-```
+```js
 import brightness from '@ohos.brightness';
 ```
 
@@ -30,6 +30,6 @@ setValue(value: number): void
 
 **示例：**
 
-```
+```js
 brightness.setValue(128);
 ```

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

@@ -8,7 +8,7 @@
 
 ## 导入模块
 
-```
+```js
 import power from '@ohos.power';
 ```
 
@@ -35,7 +35,7 @@ shutdownDevice(reason: string): void
 
 **示例：**
 
-```
+```js
 power.shutdownDevice("shutdown_test");
 console.info('power_shutdown_device_test success')
 ```
@@ -57,7 +57,7 @@ rebootDevice(reason: string): void
 
 **示例：**
 
-```
+```js
 power.rebootDevice("reboot_test");
 console.info('power_reboot_device_test success')
 ```
@@ -77,7 +77,7 @@ isScreenOn(callback: AsyncCallback<boolean>): void
 
 **示例：**
 
-```
+```js
 power.isScreenOn((error, screenOn) => {
     if (typeof error === "undefined") {
         console.info('screenOn status is ' + screenOn);
@@ -101,7 +101,7 @@ isScreenOn(): Promise<boolean>
 
 **示例：**
 
-```
+```js
 power.isScreenOn()
 .then(screenOn => {
     console.info('screenOn status is ' + screenOn);

zh-cn/application-dev/reference/apis/js-apis-screen-lock.md

@@ -7,7 +7,7 @@
 ## 导入模块
 
 
-```
+```js
 import screenlock from '@ohos.screenLock';
 ```
 
@@ -27,7 +27,7 @@ isScreenLocked(callback: AsyncCallback<boolean>): void
 
 - 示例：
   
-  ```
+  ```js
   screenlock.isScreenLocked((err, data)=>{      
      if (err) {
           console.error('isScreenLocked callback error -> ${JSON.stringify(err)}');
@@ -53,7 +53,7 @@ isScreenLocked(): Promise<boolean>
 
 - 示例：
 
-  ```
+  ```js
   screenlock.isScreenLocked().then((data) => {
       console.log('isScreenLocked success: data -> ${JSON.stringify(data)}');
   }).catch((err) => {
@@ -80,7 +80,7 @@ isSecureMode(callback: AsyncCallback<boolean>): void
 
 - 示例：
   
-  ```
+  ```js
   screenlock.isSecureMode((err, data)=>{      
      if (err) {
           console.error('isSecureMode callback error -> ${JSON.stringify(err)}');
@@ -106,7 +106,7 @@ isSecureMode(): Promise<boolean>
 
 - 示例：
 
-  ```
+  ```js
   screenlock.isSecureMode().then((data) => {
       console.log('isSecureMode success: data->${JSON.stringify(data)}');
   }).catch((err) => {
@@ -133,7 +133,7 @@ unlockScreen(callback: AsyncCallback<void>): void
 
 - 示例：
   
-  ```
+  ```js
   screenlock.unlockScreen((err)=>{      
      if (err) {
           console.error('unlockScreen callback error -> ${JSON.stringify(err)}');
@@ -159,7 +159,7 @@ unlockScreen(): Promise<void>
 
 - 示例：
   
-  ```
+  ```js
   screenlock.unlockScreen().then(() => {
       console.log('unlockScreen success');
   }).catch((err) => {

zh-cn/application-dev/reference/apis/js-apis-system-battery.md

@@ -9,7 +9,7 @@
 ## 导入模块
 
 
-```
+```js
 import battery from '@system.battery';
 ```
 
@@ -39,7 +39,7 @@ success返回值：
 
 **示例：**
 
-```
+```js
 export default {    
   getStatus() {       
     battery.getStatus({           

zh-cn/application-dev/reference/apis/js-apis-system-brightness.md

@@ -9,7 +9,7 @@
 ## 导入模块
 
 
-```
+```js
 import brightness from '@system.brightness';
 ```
 
@@ -37,7 +37,7 @@ success返回值：
 
 **示例：**
 
-  ```
+  ```js
   export default {    
     getValue() {        
       brightness.getValue({            
@@ -71,7 +71,7 @@ setValue(Object): void
 
 **示例：**
 
-  ```
+  ```js
   export default {    
     setValue() {        
       brightness.setValue({            
@@ -111,7 +111,7 @@ getMode(Object): void
 
 **示例：**
 
-  ```
+  ```js
   export default {    
     getMode() {        
       brightness.getMode({            
@@ -145,7 +145,7 @@ setMode(Object): void
 
 **示例：**
 
-  ```
+  ```js
   export default {    
     setMode() {        
       brightness.setMode({            
@@ -180,7 +180,7 @@ setKeepScreenOn(Object): void
 
 **示例：**
 
-  ```
+  ```js
   export default {    
     setKeepScreenOn() {        
       brightness.setKeepScreenOn({            

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

@@ -8,7 +8,7 @@
 
 ## 导入模块
 
-```
+```js
 import thermal from '@ohos.thermal';
 ```
 
@@ -46,7 +46,7 @@ subscribeThermalLevel(callback: AsyncCallback<ThermalLevel>): void
 
 **示例：**
 
-```
+```js
 var lev = 0;
 thermal.subscribeThermalLevel((lev) => {
     console.info("Thermal level is: " + lev);
@@ -69,7 +69,7 @@ unsubscribeThermalLevel(callback?: AsyncCallback\<void>): void
 
 **示例：**
 
-```
+```js
 thermal.unsubscribeThermalLevel(() => {
     console.info("Unsubscribe completed.");
 });
@@ -91,7 +91,7 @@ getThermalLevel(): ThermalLevel
 
 **示例：**
 
-```
+```js
 var lev = thermal.getThermalLevel();
 console.info("Thermal level is: " + lev);
 ```