diff --git a/build/js/IFrame.js b/build/js/IFrame.js
index d7d28011c..de8c4a43e 100644
--- a/build/js/IFrame.js
+++ b/build/js/IFrame.js
@@ -33,7 +33,7 @@ const SELECTOR_SIDEBAR_MENU_ITEM = '.main-sidebar .nav-item > a.nav-link'
 const SELECTOR_HEADER_MENU_ITEM = '.main-header .nav-item a.nav-link'
 const SELECTOR_HEADER_DROPDOWN_ITEM = '.main-header a.dropdown-item'
 const CLASS_NAME_IFRAME_MODE = 'iframe-mode'
-const CLASS_NAME_FULLSCREEN_MODE = 'fullscreen-mode'
+const CLASS_NAME_FULLSCREEN_MODE = 'iframe-mode-fullscreen'
 
 const Default = {
   onTabClick(item) {
diff --git a/build/scss/pages/_iframe.scss b/build/scss/pages/_iframe.scss
index 05724c99a..c0a2721f9 100644
--- a/build/scss/pages/_iframe.scss
+++ b/build/scss/pages/_iframe.scss
@@ -13,7 +13,7 @@ body.iframe-mode {
   }
 }
 
-body.fullscreen-mode {
+body.iframe-mode-fullscreen {
   overflow: hidden;
 }
 
@@ -65,7 +65,7 @@ body.fullscreen-mode {
       }
     }
 
-    body.fullscreen-mode & {
+    body.iframe-mode-fullscreen & {
       position: absolute;
       left: 0;
       top: 0;