diff --git a/frontend/src/components/dirent-list-view/dirent-list-item.js b/frontend/src/components/dirent-list-view/dirent-list-item.js
index f8c10ddaa4..5b67448010 100644
--- a/frontend/src/components/dirent-list-view/dirent-list-item.js
+++ b/frontend/src/components/dirent-list-view/dirent-list-item.js
@@ -2,7 +2,7 @@ import React, { Fragment } from 'react';
 import PropTypes from 'prop-types';
 import MD5 from 'MD5';
 import { UncontrolledTooltip } from 'reactstrap';
-import { gettext, siteRoot, mediaUrl, username, canGenerateShareLink } from '../../utils/constants';
+import { gettext, siteRoot, mediaUrl, username } from '../../utils/constants';
 import { Utils } from '../../utils/utils';
 import { seafileAPI } from '../../utils/seafile-api';
 import URLDecorator from '../../utils/url-decorator';
@@ -411,7 +411,7 @@ class DirentListItem extends React.Component {
     dragStartItemData = JSON.parse(dragStartItemData);
     if (Array.isArray(dragStartItemData)) { //move items
       let direntPaths =  dragStartItemData.map(draggedItem => {
-        return draggedItem.nodeRootPath
+        return draggedItem.nodeRootPath;
       });
 
       let selectedPath = Utils.joinPath(this.props.path, this.props.dirent.name);
diff --git a/frontend/src/pages/lib-content-view/lib-content-view.js b/frontend/src/pages/lib-content-view/lib-content-view.js
index e8a5d8fa5f..a02647890e 100644
--- a/frontend/src/pages/lib-content-view/lib-content-view.js
+++ b/frontend/src/pages/lib-content-view/lib-content-view.js
@@ -550,11 +550,11 @@ class LibContentView extends React.Component {
     seafileAPI.listDir(repoID, path).then(res => {
       let newDirentList = res.data.dirent_list;
       let newAddedDirents = newDirentList.filter(item => {
-        return !nodeChildrenNames.includes(item.name)
-      })
+        return !nodeChildrenNames.includes(item.name);
+      });
       newAddedDirents.map(item => {
         this.addNodeToTree(item.name, path, item.type);
-      })
+      });
     });
   }
 
diff --git a/frontend/src/repo-snapshot.js b/frontend/src/repo-snapshot.js
index b0750bfa55..39ad180dc6 100644
--- a/frontend/src/repo-snapshot.js
+++ b/frontend/src/repo-snapshot.js
@@ -1,7 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import { navigate } from '@reach/router';
-import moment from 'moment';
 import { Utils } from './utils/utils';
 import { gettext, loginUrl, siteRoot, mediaUrl, logoPath, logoWidth, logoHeight, siteTitle } from './utils/constants';
 import { seafileAPI } from './utils/seafile-api';
@@ -233,26 +232,26 @@ class Content extends React.Component {
     }
 
     return (
-        <table className="table-hover">
-          <thead>
-            <tr>
-              {this.theadData.map((item, index) => {
-                return <th key={index} width={item.width}>{item.text}</th>;
-              })}
-            </tr>
-          </thead>
-          <tbody>
-            {folderItems.map((item, index) => {
-              return <FolderItem 
-                key={index}
-                item={item} 
-                folderPath={folderPath}
-                renderFolder={this.props.renderFolder}
-              />;
-            })
-            }
-          </tbody>
-        </table>
+      <table className="table-hover">
+        <thead>
+          <tr>
+            {this.theadData.map((item, index) => {
+              return <th key={index} width={item.width}>{item.text}</th>;
+            })}
+          </tr>
+        </thead>
+        <tbody>
+          {folderItems.map((item, index) => {
+            return <FolderItem 
+              key={index}
+              item={item} 
+              folderPath={folderPath}
+              renderFolder={this.props.renderFolder}
+            />;
+          })
+          }
+        </tbody>
+      </table>
     );
   }
 }
diff --git a/frontend/src/utils/utils.js b/frontend/src/utils/utils.js
index 04479817e3..e1bc531b7c 100644
--- a/frontend/src/utils/utils.js
+++ b/frontend/src/utils/utils.js
@@ -231,8 +231,8 @@ export const Utils = {
 
   isIEBrower: function() { // is ie <= ie11 not include Edge
     var userAgent = navigator.userAgent;
-    var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1;
-    var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;
+    var isIE = userAgent.indexOf('compatible') > -1 && userAgent.indexOf('MSIE') > -1;
+    var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf('rv:11.0') > -1;
     return isIE || isIE11;
   },