This page lists important information for Learnosity customers who are upgrading to the 2026.2.LTS (Long Term Support) version.

API Product changes

The following outlines the API product updates introduced in this release, including changes, deprecations, and smaller new features.

Default Activity size

From v2026.2.LTS, Activities support a default maximum of 300 Items. This limit applies across authoring and delivery, including the Author API, Data API, and Items API, for standard Activities and random by group Activities.
Activities exceeding the maximum will not save in the Author or Data API and will not initialize in the Items API. Before upgrading, review your existing Activities and split any that exceed this limit into smaller Activities where possible.
For guidance on Item complexity, payload size, and Activity design recommendations, see Designing activities for reliable performance.

Annotations API

• Added keyboard support for extending text highlights, improving accessibility and enabling users to adjust highlighted text ranges using the keyboard.

Author API

• The open:activity event callback no longer receives the complete Activity JSON by default. To receive the complete Activity JSON, set the activity_list.full_activity_json initialization option to true.
• The widgetedit:widget:changed event has been renamed to widgetedit:widgettype:changed.

Items API

• When Override Activity points are enabled, Custom Question points are disabled from being overridden.
• The addItems() method now enforces the default Item Activity limit at runtime. Calls that would bring the total above the configured limit will throw an error. If your integration adds Items dynamically during a session, ensure the total does not exceed this limit.
• Added support for LTI 1.3 grade passback.

Question Editor API

• The widget:changed event has been renamed to widgettype:changed.

Reports API

• The Event Progress by Tag by User report has been removed in this LTS release and is no longer available.

CSS changes for UI improvements

A summary of the changes shown in the GitHub link are provided below. It lists all of the CSS changes between the previous LTS and this release.

See all CSS changes between v2026.1.LTS and v2026.2.LTS in GitHub.

Annotation API

• Added an underline style to highlighted text to improve accessibility and enhance visibility.

Author API

• Fixed an issue where the Activity list loading spinner did not display correctly during content loading.
• Improved the responsiveness of the confirmation message shown when adding new groups to a random Activity.
• Fixed the close button alignment in the workflow modal.
• Updated labels for random Activities to match designs.
  • Updated activity.edit.randomActivity.summaryText to remove %number% placeholder. Use %delivering% and %total% placeholders instead.
  • Renamed the maxNumberOfItemsExceeded key to randomItemsByTag.maxNumberOfItemsExceeded.
  • Replaced randomActivity.maxNumberOfItemsExceeded, randomActivity.maxNumberOfGroupsReached, and randomActivity.maxNumberOfItemsAndGroupsReached keys with randomActivity.alertHeader, randomActivity.groupLimitExceeded, randomActivity.deliveredLimitExceeded, and randomActivity.candidateLimitExceeded keys respectively.
• Fixed the Create and Search buttons in the Item List to match the size of the Author Aide button.
• Replaced the list-style-type: disc rule on the .lrn-author-activity-limit-error-list class with list-style: disc applied to its child li elements.
• Replaced the DOM structure and updated the CSS for Activity date sections and tooltips in the Activity list.

Question Editor API

• Updated the Math AI button styling to match the LDS blue outline button design.
• Fixed an issue where the Item edit button layout did not display correctly in responsive viewports.
• Updated the Assessment Player to defer the ready event until loading finishes, preventing edits while the wait panel is displayed.
• Moved the add button back into the tab headers and added keyboard tab navigation support for valid responses.

Questions API

• Increased the z-index of the mobile math modal to improve overlay visibility.

Reports API

• Added LDS pagination to the Response Analysis by Item report, including consistent pagination styling, focus management and screen reader support, a persistent live region, a pagination footer outside the scrollable report container, and layout updates to support minimum height behavior.
• Added a “Loading data…” message while the Learning Outcomes report is being retrieved.