New Frontend Plugin Slots for the Ulmo Release

Utilizing frontend plugin slots, site operators now have the ability to customize various portions of the site.

A “frontend plugin slot” refers to an area of a web page - comprising one or more visual elements - that can be “swapped out” with other visual elements. For example, one plugin slot allows you to remove the “Help” button in the header.

Overhead and hassle is minimized using the plugin slot system. Site operators can leverage a plugin slot using a configuration file; the codebase does not need to be copied (“forked”) nor are extensive changes needed. A snippet of code is all that is needed to use a plugin slot. A site operator places that code within a configuration file. Site operators should refer to the src/plugin-slots directory within each MFE’s codebase to view documentation for that MFE’s plugin slot(s).

In these release notes, we’ll detail the new and updated plugin slots found in the Ulmo release. The full list of existing plugin slots can be found in Available Frontend Plugin Slots, and usage instructions are available at Use A Frontend Plugin Framework Slot.

Where possible, descriptions of the plugin slots are provided. Click the name of the slot to be brought to the documentation page which contains example screenshots.

Note: Instance operators using these slots will need to use their fully-qualified slot id provided in the descriptions, such as org.openedx.frontend.authoring.course_unit_sidebar.v1.

Header

• Added DesktopUserMenuToggleSlot: This slot is used to replace/modify/hide the contents of the user menu toggle button on desktop sized screens.

• Added LearningUserMenuToggleSlot: This slot is used to replace/modify/hide the contents of the learning user menu toggle button.

• Added MobileUserMenuToggleSlot: This slot is used to replace/modify/hide the contents of the user menu toggle button on mobile screens.

• Added StudioHeaderSearchButtonSlot: This slot is used to replace/modify/hide the search button in the studio header.

Footer

• Added StudioFooterHelpButtonSlot: This slot is used to repace/modify/hide the help button in the studio footer.

• Added StudioFooterHelpContentSlot: This slot is used to repace/modify/hide the help content in the studio footer.

• Added StudioFooterHelpSectionSlot: This slot is used to repace/modify/hide the help section in the studio footer.

• Updated FooterSlot: New alias available.

Account MFE

• Added AdditionalProfileFieldsSlot: This slot is used to replace/modify/hide the additional profile fields in the account page.

Authoring MFE

• Added v2 CourseAuthoringUnitSidebarSlot: The new version has improved handling of styling and conditional rendering. The v1 slot is also available and retains the previous behavior.

• Added CourseFilesSlot: This slot is used to replace/modify/hide the course file table UI.

• Added CourseOutlinePageAlertsSlot: This slot is used to add alerts to the course outline page.

• Added CourseVideosSlot: This slot is used to replace/modify/hide the course video upload page UI.

• Added EditFileAlertsSlot: This slot is used to add alerts to the course file edit page.

• Added EditVideoAlertsSlot: This slot is used to add alerts to the course video edit page.

Learning MFE

• Added ContentIFrameErrorSlot: This slot is used to replace/modify the content iframe error page.

• Added CourseExitViewCoursesPluginSlot: This slot is used for modifying “View Courses” button in the course exit screen

• Added DashboardFootnoteLinkPluginSlot: This slot is used for modifying the link to the learner dashboard in the footnote on the course exit page

• Added SequenceNavigationSlot: This slot is used to replace/modify/hide the sequence navigation component that controls navigation between units within a course sequence.

• Updated CourseBreadcrumbsSlot: Added pluginProps.

• Updated NotificationTraySlot: Added pluginProps.

• Updated UnitTitleSlot: Modified pluginProps behavior, isEnabledOutlineSidebar is now always true.

See also

• Use A Frontend Plugin Framework Slot

• Customizing Learner Dashboard Using Frontend “Slots”

• Customizing Site Header Using Frontend “Slots”

Maintenance chart

Review Date	Working Group Reviewer	Release	Test situation
2025-12-05	Frontend WG	Ulmo	Pass

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