Telerik® UI for Blazor 15.0.0 (2026 Q3)
August 12, 2026
Common
NEW- Implemented a unified mechanism to change SVG icons globally or per component type via ITelerikIconService. Documentation
- Chain Of Thought component Documentation | Demo
- Tool Call component Documentation | Demo
- Checkpoint component Documentation | Demo
- Citation component Documentation | Demo
- Reasoning component Documentation | Demo
- Compatibility with .NET 11 Preview 7
- Implemented different watermark banners for trial users
- Introduced an Upgrade Assistant tool to automate NuGet updates, CDN reference rewrites, and breaking change fixes Documentation
- Introduced a Version Upgrade skill for the AI Assistant to help with project migrations
- Introduced a Licensing skill for the AI Assistant to provide guidance on product licensing
- Unsafe template syntax for dataviz components is removed, use JS functions instead. This affects components like Chart, StockChart, Map, Diagram, Gauges, etc.
- Supports Bootstrap theme version 14.5.0
- Supports Classic theme version 14.5.0
- Supports Default theme version 14.5.0
- Supports Fluent theme version 14.5.0
- Supports Material theme version 14.5.0
- Supports Meridian theme version 14.5.0
DatePicker
NEW- Added FocusedDate parameter Documentation | Demo
DateTimePicker
NEW- Added FocusedDate parameter Documentation | Demo
Diagram
NEW- Allow rich text content for shapes and connections Documentation | Demo
DropDownList
FIXED- FieldIdentifier is set only on initialization
ExpansionPanel
FIXED- Prevent page scroll when toggling with space key
FileManager
FIXED- SelectedItemsChanged is triggered when ListView is active
FileSelect
NEW- Improve file read performance
Grid
FIXED- Unlocking a column from the column menu does not work
- Add k-sortable class to the header cell if the column is sortable
- Virtual scrolling does not work with no data template
- SearchBox may skip typed characters randomly
MultiSelect
NEW- Added checkbox support for visual selection indication in the popup list Documentation | Demo
- Added "Select All" sticky header item to bulk select all currently available items Documentation | Demo
PivotGrid
FIXED- Horizontontal scrolling resets vertical scrollbar
Popup
FIXED- OnHide does not fire on outside click after programmatic Hide
PromptBox
FIXED- Recalculate auto-mode textarea height after multiline state update on paste
- OnPromptAction does not fire after runtime Mode change
Scheduler
NEW- Add 'add new event' tool Documentation | Demo
- Add confirmation dialog when removing recurrence
- Add popover opening upon more events button click to preview the events before changing the view
- New adaptive appointment rendering
- Redesign and change layout of the editing form and recurrence editor
- Add read-only state for the appointments
- New enhanced 'more events' button rendering
- Replace compact view tool native select with telerik dropdown menu button
- New compact mode for tools and adaptive toolbar behavior
- Agenda view exception on runtime grouping removal
- Render correctly empty time span and midnight events
- Use invariant CSS numeric formatting for Timeline culture regression
- The SchedulerPopupEditFormSettings parameters Columns, ColumnSpacing, and Orientation are removed.
TabStrip
FIXED- Pinned tabs should be first when set in onstateinit
- Overflow menu button should be initially enabled when tabs are overflowing and is rendered inside template
Taskboard
FIXED- Prevent TaskBoard rendering failure caused by missing localization service
TreeView
FIXED- OnItemContextMenu fires for all parent items
New features & Roadmap
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