Breaking Changes in 15.0.0

Updated on May 20, 2026

Barcodes

Barcode and QRCode have been converted to functional components. The ref now returns BarcodeHandle and QRCodeHandle respectively instead of class instances.

Button, DropDownButton, and SplitButton no longer accept 'dark' or 'light' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary' | 'info' | 'success' | 'warning' | 'error' | 'inverse'.
FloatingActionButton no longer accepts 'info', 'success', 'warning', 'error', 'dark', 'light', or 'inverse' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary'.

The onLoadMoreMessages event of the Chat component now fires in both built-in and remote endless scroll modes. Previously it only fired in remote mode (messages.length < total).
The startIndex and endIndex in ChatLoadMoreMessagesEvent now represent the full range that should be rendered, not just the requested delta.

Calendar has been converted to a functional component. The ref now returns a CalendarHandle instead of a class instance.
MultiViewCalendar has been converted to a functional component. The ref now returns a MultiViewCalendarHandle instead of a class instance.
CalendarChangeEvent generic type parameter default changed from Calendar to CalendarHandle.
CalendarCell is now a React.memo wrapped functional component instead of a class component.
TodayCommand has been converted to a functional component.

The cells prop on GridColumn now accepts GridColumnCellsSettings instead of GridCellsSettings. This omits group, hierarchy, and select properties which are only applicable at the Grid level.

Icon and SvgIcon no longer accept 'dark' or 'light' as themeColor values. Valid values are: 'inherit' | 'primary' | 'secondary' | 'tertiary' | 'info' | 'success' | 'warning' | 'error' | 'inverse'.
Some SVG icons have been renamed or consolidated in @progress/kendo-svg-icons v5.0.0 (e.g., caretAltDownIcon → chevronDownIcon, starOutlineIcon → starIcon). Use the available codemod to automate this migration. Refer to the Iconography changelog v5.0.0 for the complete mapping.
Some SVG icons have been removed without replacement in @progress/kendo-svg-icons v5.0.0 (bloggerIcon, bloggerBoxIcon, flashManagerIcon, silverlightIcon, stumbleUponIcon, stumbleUponBoxIcon). Refer to the Iconography changelog v5.0.0 for the complete list.
Font icon aliases are removed and no longer supported in @progress/kendo-font-icons v5.0.0. Use canonical icon class names instead (e.g., use k-i-arrow-rotate-ccw instead of k-i-reset).
The default icon variant is changed to outline in v5.0.0.

Badge no longer accepts 'dark', 'light', 'inverse', or 'inherit' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary' | 'info' | 'success' | 'warning' | 'error'.
Loader no longer accepts 'info', 'success', 'warning', 'error', 'dark', 'light', or 'inverse' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary'.

AppBar no longer accepts 'info', 'success', 'warning', 'error', 'dark', 'light', or 'inherit' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary' | 'inverse'.
Avatar no longer accepts 'info', 'success', 'warning', 'error', 'dark', 'light', or 'inverse' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary'.
BottomNavigation no longer accepts 'info', 'success', 'warning', 'error', 'dark', or 'light' as themeColor values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary' | 'inverse'.
Menu has been converted to a functional component. The ref now returns a MenuHandle instead of a class instance.
MenuSelectEvent and MenuCloseEvent target type changed from Menu to MenuHandle.

Notification no longer accepts 'dark' or 'light' as type.style values. Valid values are: 'base' | 'primary' | 'secondary' | 'tertiary' | 'info' | 'success' | 'warning' | 'error' | 'inverse' | 'none'.