update zh-cn/application-dev/reference/apis/js-apis-data-storage.md.

Signed-off-by: N@ge-yafang <geyafang@huawei.com>
Signed-off-by: N葛亚芳 <geyafang@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-data-storage.md

@@ -56,11 +56,11 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-let storage = data_storage.getStorageSync(path + '/mystore');
-storage.putSync('startup', 'auto');
-storage.flushSync();
+  let storage = data_storage.getStorageSync(path + '/mystore');
+  storage.putSync('startup', 'auto');
+  storage.flushSync();
+});
 ```
 
 
@@ -89,16 +89,16 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-data_storage.getStorage(path + '/mystore', function (err, storage) {
+  data_storage.getStorage(path + '/mystore', function (err, storage) {
     if (err) {
       console.info("Failed to get the storage. path: " + path + '/mystore');
       return;
     }
     storage.putSync('startup', 'auto');
     storage.flushSync();
-})
+  })
+});
 ```
 
 
@@ -132,15 +132,15 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-let getPromise = data_storage.getStorage(path + '/mystore');
-getPromise.then((storage) => {
+  let getPromise = data_storage.getStorage(path + '/mystore');
+  getPromise.then((storage) => {
     storage.putSync('startup', 'auto');
     storage.flushSync();
-}).catch((err) => {
+  }).catch((err) => {
     console.info("Failed to get the storage. path: " + path + '/mystore');
-})
+  })
+});
 ```
 
 
@@ -168,12 +168,11 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
     path = filePath;
     console.info("======================>getFilesDirPromsie====================>");
-});  
 
-data_storage.deleteStorageSync(path + '/mystore');
+    data_storage.deleteStorageSync(path + '/mystore');
+});  
 ```
 
-
 ## data_storage.deleteStorage
 
 deleteStorage(path: string, callback: AsyncCallback<void>): void
@@ -199,15 +198,15 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-data_storage.deleteStorage(path + '/mystore', function (err) {
+  data_storage.deleteStorage(path + '/mystore', function (err) {
     if (err) {
       console.info("Failed to delete the storage with err: " + err);
       return;
     }
     console.info("Succeeded in deleting the storage.");
-})
+  })
+});
 ```
 
 
@@ -241,14 +240,14 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-let promisedelSt = data_storage.deleteStorage(path + '/mystore');
-promisedelSt.then(() => {
+  let promisedelSt = data_storage.deleteStorage(path + '/mystore');
+  promisedelSt.then(() => {
     console.info("Succeeded in deleting the storage.");
-}).catch((err) => {
+  }).catch((err) => {
     console.info("Failed to delete the storage with err: " + err);
-})
+  })
+});
 ```
 
 
@@ -275,9 +274,9 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
     path = filePath;
     console.info("======================>getFilesDirPromsie====================>");
-});  
     
-data_storage.removeStorageFromCacheSync(path + '/mystore');
+    data_storage.removeStorageFromCacheSync(path + '/mystore');
+});  
 ```
 
 
@@ -306,15 +305,15 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-data_storage.removeStorageFromCache(path + '/mystore', function (err) {
+  data_storage.removeStorageFromCache(path + '/mystore', function (err) {
     if (err) {
       console.info("Failed to remove storage from cache with err: " + err);
       return;
     }
     console.info("Succeeded in removing storage from cache.");
-})
+  })
+});
 ```
 
 
@@ -348,22 +347,20 @@ var context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromsie====================>");
-});  
 
-let promiserevSt = data_storage.removeStorageFromCache(path + '/mystore')
-promiserevSt.then(() => {
+  let promiserevSt = data_storage.removeStorageFromCache(path + '/mystore')
+  promiserevSt.then(() => {
     console.info("Succeeded in removing storage from cache.");
-}).catch((err) => {
+  }).catch((err) => {
     console.info("Failed to remove storage from cache with err: " + err);
-})
+  })
+});
 ```
 
-
 ## Storage
 
 提供获取和修改存储数据的接口。
 
-
 ### getSync
 
 getSync(key: string, defValue: ValueType): ValueType