Merge pull request #15264 from craftcms/bugfix/cms-15253-sidebar-overlap

Fix sidebar overlap

CHANGELOG.md

@@ -16,6 +16,7 @@
 - Fixed an error that occurred when opening an element’s editor slideout via its “Edit” action menu item, if the element had provisional changes. ([#15248](https://github.com/craftcms/cms/pull/15248))
 - Fixed a bug where recursively-nested Matrix entries could be lost if multiple of them were edited, and not immediately saved. ([#15256](https://github.com/craftcms/cms/issues/15256))
 - Fixed an error that could occur when upgrading to Craft 5 if the database user didn’t have permission to disable foreign key constraints. ([#15262](https://github.com/craftcms/cms/issues/15262))
+- Fixed a bug where expanded sidebar navigations could overlap the main content on small screens. ([#15253](https://github.com/craftcms/cms/issues/15253))
 
 ## 5.2.3 - 2024-06-20
 

src/web/assets/cp/src/js/CP.js

@@ -830,7 +830,9 @@ Craft.CP = Garnish.Base.extend(
     },
 
     updateFixedHeader: function () {
-      if (this.isMobile) {
+      // Checking if the sidebar toggle is visible
+      // https://stackoverflow.com/a/21696585
+      if (this.isMobile || this.$sidebarToggle[0].offsetParent !== null) {
         return;
       }