diff --git a/interfaces/kits/picker/picker.js b/interfaces/kits/picker/picker.js
index 57b56d36a82f08792d1d4f65469dce783b6927ef..e58e8b20383f0b772f5f7ec30dfaeeb9c2056844 100644
--- a/interfaces/kits/picker/picker.js
+++ b/interfaces/kits/picker/picker.js
@@ -14,305 +14,305 @@
  */
 
 const PhotoViewMIMETypes = {
-    IMAGE_TYPE: "image/*",
-    VIDEO_TYPE: "video/*",
-    IMAGE_VIDEO_TYPE: "*/*",
-    INVALID_TYPE: ""
+  IMAGE_TYPE: "image/*",
+  VIDEO_TYPE: "video/*",
+  IMAGE_VIDEO_TYPE: "*/*",
+  INVALID_TYPE: ""
 }
 
 const ErrCode = {
-    INVALID_ARGS: 13900020,
-    RESULT_ERROR: 13900042,
+  INVALID_ARGS: 13900020,
+  RESULT_ERROR: 13900042,
 }
 
 const ERRCODE_MAP = new Map([
-    [ErrCode.INVALID_ARGS, "Invalid argument"],
-    [ErrCode.RESULT_ERROR, "Unknown error"],
+  [ErrCode.INVALID_ARGS, "Invalid argument"],
+  [ErrCode.RESULT_ERROR, "Unknown error"],
 ]);
 
 const PHOTO_VIEW_MIME_TYPE_MAP = new Map([
-    [PhotoViewMIMETypes.IMAGE_TYPE, "FILTER_MEDIA_TYPE_IMAGE"],
-    [PhotoViewMIMETypes.VIDEO_TYPE, "FILTER_MEDIA_TYPE_VIDEO"],
-    [PhotoViewMIMETypes.IMAGE_VIDEO_TYPE, "FILTER_MEDIA_TYPE_ALL"],
+  [PhotoViewMIMETypes.IMAGE_TYPE, "FILTER_MEDIA_TYPE_IMAGE"],
+  [PhotoViewMIMETypes.VIDEO_TYPE, "FILTER_MEDIA_TYPE_VIDEO"],
+  [PhotoViewMIMETypes.IMAGE_VIDEO_TYPE, "FILTER_MEDIA_TYPE_ALL"],
 ]);
 
 const CREATE_FILE_NAME_LENGTH_LIMIT = 256;
 
 function checkArguments(args) {
-    if (args.length == 2 && typeof args[1] != "function") {
+  if (args.length == 2 && typeof args[1] != "function") {
+    return false;
+  }
+
+  if (args.length > 0 && typeof args[0] == 'object') {
+    let option = args[0];
+    if (option.maxSelectNumber != undefined) {
+      if (option.maxSelectNumber.toString().indexOf(".") != -1) {
         return false;
+      }
     }
 
-    if (args.length > 0 && typeof args[0] == 'object') {
-        let option = args[0];
-        if (option.maxSelectNumber != undefined) {
-            if (option.maxSelectNumber.toString().indexOf(".") != -1) {
-                return false;
-            }
-        }
-        
-        if (option.newFileNames != undefined && option.newFileNames.length > 0) {
-            for (let i = 0; i < option.newFileNames.length; i++) {
-                let value = option.newFileNames[i];
-                if ((value.indexOf(".") == -1) || (value.length > CREATE_FILE_NAME_LENGTH_LIMIT)) {
-                    console.log("[picker] checkArguments Invalid name: " + value);
-                    return false;
-                }
-            }
+    if (option.newFileNames != undefined && option.newFileNames.length > 0) {
+      for (let i = 0; i < option.newFileNames.length; i++) {
+        let value = option.newFileNames[i];
+        if ((value.indexOf(".") == -1) || (value.length > CREATE_FILE_NAME_LENGTH_LIMIT)) {
+          console.log("[picker] checkArguments Invalid name: " + value);
+          return false;
         }
+      }
     }
+  }
 
-    return true;
+  return true;
 }
 
 function getErr(errCode) {
-    return {code: errCode, message: ERRCODE_MAP.get(errCode)};
+  return {code: errCode, message: ERRCODE_MAP.get(errCode)};
 }
 
 async function photoPickerSelect() {
-    if (!checkArguments(arguments)) {
-        console.log("[picker] Invalid argument");
-        throw Error(getErr(ErrCode.INVALID_ARGS));
+  if (!checkArguments(arguments)) {
+    console.log("[picker] Invalid argument");
+    throw Error(getErr(ErrCode.INVALID_ARGS));
+  }
+
+  let config = {
+    "action": "ohos.want.action.photoPicker",
+    "type": "multipleselect",
+    parameters: {
+      'uri': "multipleselect",
+    },
+  }
+  if (arguments.length > 0 && typeof arguments[0] == 'object') {
+    let option = arguments[0];
+    if (option.maxSelectNumber > 0) {
+      let select = (option.maxSelectNumber == 1) ? 'singleselect' : 'multipleselect';
+      config.type = select;
+      config.parameters.uri = select;
+      config.parameters.maxSelectCount = option.maxSelectNumber;
     }
-
-    let config = {
-        "action": "ohos.want.action.photoPicker",
-        "type": "multipleselect",
-        parameters: {
-            'uri': "multipleselect",
-        },
+    if (option.MIMEType.length > 0 && PHOTO_VIEW_MIME_TYPE_MAP.has(option.MIMEType)) {
+      config.parameters.filterMediaType = PHOTO_VIEW_MIME_TYPE_MAP.get(option.MIMEType);
     }
-    if (arguments.length > 0 && typeof arguments[0] == 'object') {
-        let option = arguments[0];
-        if (option.maxSelectNumber > 0) {
-            let select = (option.maxSelectNumber == 1) ? "singleselect" : "multipleselect";
-            config.type = select;
-            config.parameters.uri = select;
-            config.parameters.maxSelectCount = option.maxSelectNumber;
-        }
-        if (option.MIMEType.length > 0 && PHOTO_VIEW_MIME_TYPE_MAP.has(option.MIMEType)) {
-            config.parameters.filterMediaType = PHOTO_VIEW_MIME_TYPE_MAP.get(option.MIMEType);
-        }
+  }
+  console.log("[picker] config: " + JSON.stringify(config));
+
+  try {
+    let context = getContext(this);
+    let result = await context.startAbilityForResult(config, {windowMode: 1});
+    console.log("[picker] result: " + JSON.stringify(result));
+    let uris = result.want.parameters["select-item-list"];
+    let isOrigin = result.want.parameters["isOriginal"];
+    if (result.resultCode == -1) {
+      result.resultCode = 0;
+      uris = [];
     }
-    console.log("[picker] config: " + JSON.stringify(config));
-
-    try {
-        let context = getContext(this);
-        let result = await context.startAbilityForResult(config, {windowMode: 1});
-        console.log("[picker] result: " + JSON.stringify(result));
-        let uris = result.want.parameters["select-item-list"];
-        let isOrigin = result.want.parameters["isOriginal"];
-        if (result.resultCode == -1) {
-            result.resultCode = 0;
-            uris = [];
-        }
-        let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
-        let selectResult = (result.resultCode == 0) ? new PhotoSelectResult(uris, isOrigin) : null;
-        if (arguments.length == 2 && typeof arguments[1] == "function") {
-            return arguments[1](err, selectResult);
-        } else if (arguments.length == 1 && typeof arguments[0] == "function") {
-            return arguments[0](err, selectResult);
-        }
-        return new Promise((resolve, reject) => {
-            if (result.resultCode == 0) {
-                resolve(selectResult);
-            } else {
-                console.log("[picker] err: " + result.resultCode);
-                reject(result.resultCode);
-            }
-        })
-    } catch (error) {
-        console.log("[picker] error: " + error);
+    let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
+    let selectResult = (result.resultCode == 0) ? new PhotoSelectResult(uris, isOrigin) : null;
+    if (arguments.length == 2 && typeof arguments[1] == "function") {
+      return arguments[1](err, selectResult);
+    } else if (arguments.length == 1 && typeof arguments[0] == "function") {
+      return arguments[0](err, selectResult);
     }
+    return new Promise((resolve, reject) => {
+      if (result.resultCode == 0) {
+        resolve(selectResult);
+      } else {
+        console.log("[picker] err: " + result.resultCode);
+        reject(result.resultCode);
+      }
+    })
+  } catch (error) {
+    console.log("[picker] error: " + error);
+  }
 }
 
 async function documentPickerSelect() {
-    if (!checkArguments(arguments)) {
-        console.log("[picker] Invalid argument");
-        throw Error(getErr(ErrCode.INVALID_ARGS));
+  if (!checkArguments(arguments)) {
+    console.log("[picker] Invalid argument");
+    throw Error(getErr(ErrCode.INVALID_ARGS));
+  }
+
+  let config = {
+    action: "ohos.want.action.OPEN_FILE",
+    parameters: {
+      'startMode': 'choose',
     }
-
-    let config = {
-        action: "ohos.want.action.OPEN_FILE",
-        parameters: {
-            'startMode': 'choose',
-        }
+  }
+  console.log("[picker] config: " + JSON.stringify(config));
+
+  try {
+    let context = getContext(this);
+    let result = await context.startAbilityForResult(config, {windowMode: 1});
+    console.log("[picker] result: " + JSON.stringify(result));
+    let uris = result.want.parameters.select_item_list;
+    if (result.resultCode == -1) {
+      result.resultCode = 0;
+      uris = [];
     }
-    console.log("[picker] config: " + JSON.stringify(config));
-
-    try {
-        let context = getContext(this);
-        let result = await context.startAbilityForResult(config, {windowMode: 1});
-        console.log("[picker] result: " + JSON.stringify(result));
-        let uris = result.want.parameters.select_item_list;
-        if (result.resultCode == -1) {
-            result.resultCode = 0;
-            uris = [];
-        }
-        let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
-        let uriResult = (result.resultCode == 0) ? uris : null;
-        if (arguments.length == 2 && typeof arguments[1] == "function") {
-            return arguments[1](err, uriResult);
-        } else if (arguments.length == 1 && typeof arguments[0] == "function") {
-            return arguments[0](err, uriResult);
-        }
-        return new Promise((resolve, reject) => {
-            if (result.resultCode == 0) {
-                resolve(uris);
-            } else {
-                console.log("[picker] err: " + result.resultCode);
-                reject(result.resultCode);
-            }
-        })
-    } catch (error) {
-        console.log("[picker] error: " + error);
+    let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
+    let uriResult = (result.resultCode == 0) ? uris : null;
+    if (arguments.length == 2 && typeof arguments[1] == "function") {
+      return arguments[1](err, uriResult);
+    } else if (arguments.length == 1 && typeof arguments[0] == "function") {
+      return arguments[0](err, uriResult);
     }
+    return new Promise((resolve, reject) => {
+      if (result.resultCode == 0) {
+        resolve(uris);
+      } else {
+        console.log("[picker] err: " + result.resultCode);
+        reject(result.resultCode);
+      }
+    })
+  } catch (error) {
+    console.log("[picker] error: " + error);
+  }
 }
 
 async function documentPickerSave() {
-    if (!checkArguments(arguments)) {
-        console.log("[picker] Invalid argument");
-        throw Error({code: 13900020, message: "Invalid argument"});
+  if (!checkArguments(arguments)) {
+    console.log("[picker] Invalid argument");
+    throw Error({code: 13900020, message: "Invalid argument"});
+  }
+
+  let config = {
+    action: "ohos.want.action.CREATE_FILE",
+    parameters: {
+      'startMode': 'save',
     }
-
-    let config = {
-        action: "ohos.want.action.CREATE_FILE",
-        parameters: {
-            'startMode': 'save',
-        }
+  }
+  if (arguments.length > 0 && typeof arguments[0] == 'object') {
+    let option = arguments[0];
+    if (option.newFileNames.length > 0) {
+      config.parameters.key_pick_file_name = option.newFileNames;
+      config.parameters.saveFile = option.newFileNames[0];
     }
-    if (arguments.length > 0 && typeof arguments[0] == 'object') {
-        let option = arguments[0];
-        if (option.newFileNames.length > 0) {
-            config.parameters.key_pick_file_name = option.newFileNames;
-            config.parameters.saveFile = option.newFileNames[0];
-        }
+  }
+  console.log("[picker] config: " + JSON.stringify(config));
+
+  try {
+    let context = getContext(this);
+    let result = await context.startAbilityForResult(config, {windowMode: 1});
+    console.log("[picker] result: " + JSON.stringify(result));
+    let uris = result.want["parameters"].pick_path_return;
+    if (result.resultCode == -1) {
+      result.resultCode = 0;
+      uris = [];
     }
-    console.log("[picker] config: " + JSON.stringify(config));
-
-    try {
-        let context = getContext(this);
-        let result = await context.startAbilityForResult(config, {windowMode: 1});
-        console.log("[picker] result: " + JSON.stringify(result));
-        let uris = result.want["parameters"].pick_path_return;
-        if (result.resultCode == -1) {
-            result.resultCode = 0;
-            uris = [];
-        }
-        let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
-        let uriResult = (result.resultCode == 0) ? uris : null;
-        if (arguments.length == 2 && typeof arguments[1] == "function") {
-            return arguments[1](err, uriResult);
-        } else if (arguments.length == 1 && typeof arguments[0] == "function") {
-            return arguments[0](err, uriResult);
-        }
-        return new Promise((resolve, reject) => {
-            if (result.resultCode == 0) {
-                resolve(uris);
-            } else {
-                console.log("[picker] err: " + result.resultCode);
-                reject(result.resultCode);
-            }
-        })
-    } catch (error) {
-        console.log("[picker] error: " + error);
+    let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
+    let uriResult = (result.resultCode == 0) ? uris : null;
+    if (arguments.length == 2 && typeof arguments[1] == "function") {
+      return arguments[1](err, uriResult);
+    } else if (arguments.length == 1 && typeof arguments[0] == "function") {
+      return arguments[0](err, uriResult);
     }
+    return new Promise((resolve, reject) => {
+      if (result.resultCode == 0) {
+        resolve(uris);
+      } else {
+        console.log("[picker] err: " + result.resultCode);
+        reject(result.resultCode);
+      }
+    })
+  } catch (error) {
+    console.log("[picker] error: " + error);
+  }
 }
 
 async function audioPickerSelect() {
-    if (!checkArguments(arguments)) {
-        console.log("[picker] Invalid argument");
-        throw Error({code: 13900020, message: "Invalid argument"});
+  if (!checkArguments(arguments)) {
+    console.log("[picker] Invalid argument");
+    throw Error({code: 13900020, message: "Invalid argument"});
+  }
+
+  let config = {
+    action: "ohos.want.action.OPEN_FILE",
+    parameters: {
+      'startMode': 'choose',
     }
-
-    let config = {
-        action: "ohos.want.action.OPEN_FILE",
-        parameters: {
-            'startMode': 'choose',
-        }
+  }
+  console.log("[picker] config: " + JSON.stringify(config));
+
+  try {
+    let context = getContext(this);
+    let result = await context.startAbilityForResult(config, {windowMode: 1});
+    console.log("[picker] result: " + JSON.stringify(result));
+    let uris = result.want.parameters.select_item_list;
+    if (result.resultCode == -1) {
+      result.resultCode = 0;
+      uris = [];
     }
-    console.log("[picker] config: " + JSON.stringify(config));
-
-    try {
-        let context = getContext(this);
-        let result = await context.startAbilityForResult(config, {windowMode: 1});
-        console.log("[picker] result: " + JSON.stringify(result));
-        let uris = result.want.parameters.select_item_list;
-        if (result.resultCode == -1) {
-            result.resultCode = 0;
-            uris = [];
-        }
-        let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
-        let uriResult = (result.resultCode == 0) ? uris : null;
-        if (arguments.length == 2 && typeof arguments[1] == "function") {
-            return arguments[1](err, uriResult);
-        } else if (arguments.length == 1 && typeof arguments[0] == "function") {
-            return arguments[0](err, uriResult);
-        }
-        return new Promise((resolve, reject) => {
-            if (result.resultCode == 0) {
-                resolve(uris);
-            } else {
-                console.log("[picker] err: " + result.resultCode);
-                reject(result.resultCode);
-            }
-        })
-    } catch (error) {
-        console.log("[picker] error: " + error);
+    let err = (result.resultCode == 0) ? null : getErr(ErrCode.RESULT_ERROR);
+    let uriResult = (result.resultCode == 0) ? uris : null;
+    if (arguments.length == 2 && typeof arguments[1] == "function") {
+      return arguments[1](err, uriResult);
+    } else if (arguments.length == 1 && typeof arguments[0] == "function") {
+      return arguments[0](err, uriResult);
     }
+    return new Promise((resolve, reject) => {
+      if (result.resultCode == 0) {
+        resolve(uris);
+      } else {
+        console.log("[picker] err: " + result.resultCode);
+        reject(result.resultCode);
+      }
+    })
+  } catch (error) {
+    console.log("[picker] error: " + error);
+  }
 }
 
 function PhotoSelectOptions() {
-    this.MIMEType = PhotoViewMIMETypes.INVALID_TYPE;
-    this.maxSelectNumber = -1;
+  this.MIMEType = PhotoViewMIMETypes.INVALID_TYPE;
+  this.maxSelectNumber = -1;
 }
 
 function PhotoSelectResult(uris, isOriginalPhoto) {
-    this.photoUris = uris;
-    this.isOriginalPhoto = isOriginalPhoto;
+  this.photoUris = uris;
+  this.isOriginalPhoto = isOriginalPhoto;
 }
 
 function PhotoSaveOptions() {
-    this.newFileNames = [];
+  this.newFileNames = [];
 }
 
 function DocumentSelectOptions() {}
 
 function DocumentSaveOptions() {
-    this.newFileNames = [];
+  this.newFileNames = [];
 }
 
 function AudioSelectOptions() {}
 
 function AudioSaveOptions() {
-    this.newFileNames = [];
+  this.newFileNames = [];
 }
 
 function PhotoViewPicker() {
-    this.select = photoPickerSelect;
-    this.save = documentPickerSave;
+  this.select = photoPickerSelect;
+  this.save = documentPickerSave;
 }
 
 function DocumentViewPicker() {
-    this.select = documentPickerSelect;
-    this.save = documentPickerSave;
+  this.select = documentPickerSelect;
+  this.save = documentPickerSave;
 }
 
 function AudioViewPicker() {
-    this.select = audioPickerSelect;
-    this.save = documentPickerSave;
+  this.select = audioPickerSelect;
+  this.save = documentPickerSave;
 }
 
 export default {
-    PhotoViewMIMETypes : PhotoViewMIMETypes,
-    PhotoSelectOptions : PhotoSelectOptions,
-    PhotoSelectResult : PhotoSelectResult,
-    PhotoSaveOptions : PhotoSaveOptions,
-    DocumentSelectOptions : DocumentSelectOptions,
-    DocumentSaveOptions : DocumentSaveOptions,
-    AudioSelectOptions : AudioSelectOptions,
-    AudioSaveOptions : AudioSaveOptions,
-    PhotoViewPicker : PhotoViewPicker,
-    DocumentViewPicker: DocumentViewPicker,
-    AudioViewPicker : AudioViewPicker,
+  PhotoViewMIMETypes : PhotoViewMIMETypes,
+  PhotoSelectOptions : PhotoSelectOptions,
+  PhotoSelectResult : PhotoSelectResult,
+  PhotoSaveOptions : PhotoSaveOptions,
+  DocumentSelectOptions : DocumentSelectOptions,
+  DocumentSaveOptions : DocumentSaveOptions,
+  AudioSelectOptions : AudioSelectOptions,
+  AudioSaveOptions : AudioSaveOptions,
+  PhotoViewPicker : PhotoViewPicker,
+  DocumentViewPicker: DocumentViewPicker,
+  AudioViewPicker : AudioViewPicker,
 }
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