Breaking Changes in 10.0.0

Updated on Nov 10, 2026

The Kendo UI for Vue 10.0.0 release redesigns the layout and flows of the Scheduler create and edit form. No public properties, events, or exports are removed or renamed, so the migration requires reviewing your code rather than updating API names.

Scheduler

• MonthView—The more button of a slot with hidden events no longer switches the Scheduler to the Day view. It opens the new MoreEventsPopover (the .k-scheduler-popover element) with the events of the slot, and the click target of ShowMoreItemsButton is now { element, slot }.

  • Before: Clicking the k-more-events button switched the Scheduler to the Day view.
  • After: Clicking the button opens the popover.
  • To migrate, review the handlers of the showmoreitems event (@showmoreitems, @show-more-items, or onShowmoreitems), the custom ShowMoreItemsButton usage, and the tests that expect the Day view after the click. Style the new .k-scheduler-popover element if needed. For more information, see Month View.

• SchedulerForm—The dialog title now comes from the scheduler.editorNewEvent and scheduler.editorEditEvent messages. The scheduler.editorTitle message is no longer used.

  • Before: The dialog title was provided by the scheduler.editorTitle message.
  • After: The title of a new event comes from scheduler.editorNewEvent, and the title of an existing event comes from scheduler.editorEditEvent.
  • To migrate, replace scheduler.editorTitle in your localization messages with scheduler.editorNewEvent and scheduler.editorEditEvent. The scheduler-editor-title-message codemod does this automatically and keeps your customized text. For more information, see Scheduler Globalization.

• SchedulerForm—The footer buttons have a new alignment and order, and the Delete button is now part of the form.

  • Before: The k-form-buttons in the footer were aligned to the start.
  • After: The k-form-buttons are aligned to the end, in the order Delete (rendered for existing events only), Cancel, Save.
  • To migrate, update the CSS selectors and the tests that depend on the old footer alignment and button order. For more information, see SchedulerFormProps and SchedulerActionButtonsProps.

• SchedulerFormEditor—The default startEditor and endEditor are now ZonedSplitDateTime, and custom editors receive extra props.

  • Before: Custom startEditor and endEditor components did not receive the new props.
  • After: Custom startEditor and endEditor components also receive the isAllDay, connector, fieldError, ariaLabel, timeAriaLabel, and timezone props.
  • To migrate, make your custom startEditor and endEditor components compatible with the new props, or remove the custom components to use the new defaults. For more information, see Custom Edit Forms and SchedulerFormEditorProps.

• SchedulerFormEditor—The recurrenceEditor now renders inside the new SchedulerRecurrenceDialog component.

  • Before: The recurrenceEditor was rendered directly in the form.
  • After: The recurrenceEditor is rendered in SchedulerRecurrenceDialog. SchedulerFormEditor adds the recurrenceButtonTextTemplate and recurrenceSummaryTemplate props, and forwards the recurrenceSummaryTemplate to the dialog.
  • To migrate, make your custom recurrenceEditor components work inside the dialog, and set the new templates on SchedulerFormEditor to customize the recurrence button text and the recurrence summary. For more information, see RecurrenceButtonTextTemplateProps and RecurrenceSummaryTemplateProps.

• SchedulerItem—The events no longer render the delete icon. This applies to SchedulerItem, SchedulerEditItem, SchedulerViewItem, and SchedulerProportionalViewItem.

  • Before: Each event rendered a span.k-event-actions > a.k-link.k-event-delete element, and clicking it emitted removeclick.
  • After: The element is not rendered. The removeclick event and the onRemoveClick prop still exist, but the item UI does not fire them. An event is deleted from the edit form through the Delete button of SchedulerActionButtons, which triggers the onDelete event of SchedulerForm.
  • To migrate, remove the CSS rules, test queries, and simulated clicks that target .k-event-delete and .k-event-actions on events, and move any custom delete flow that relies on removeclick to the onDelete event of the form. For more information, see Scheduler Editing and SchedulerItemProps.

  The task components (SchedulerTask, SchedulerEditTask, and SchedulerViewTask) are not affected and still render k-event-delete.

• The default selectedDateFormat and selectedShortDateFormat of the Scheduler views have changed. Views that set the formats explicitly are not affected.

  View	Property	Before	After
  DayView, TimelineView	selectedDateFormat	'{0:D}'	'{0:M}'
  DayView, TimelineView	selectedShortDateFormat	'{0:d}'	'{0:m}'
  AgendaView, WeekView, WorkWeekView	selectedDateFormat	'{0:D} - {1:D}'	'{0:M} - {1:M}'
  AgendaView, WeekView, WorkWeekView	selectedShortDateFormat	'{0:d} - {1:d}'	'{0:m} - {1:m}'
  MultiDayTimelineView	selectedDateFormat	'{0:D} - {1:D}'	'{0:M}'
  MultiDayTimelineView	selectedShortDateFormat	'{0:d} - {1:d}'	'{0:m}'
  MonthView	selectedShortDateFormat	'{0:Y}'	'{0:y}'

  To keep the previous text, set selectedDateFormat and selectedShortDateFormat explicitly to the old values. Otherwise, update the tests, screenshots, and localized texts that assert the selected date label. For more information, see Scheduler Views.

For the changes in the generated markup and the CSS classes, see Rendering Changes in 10.0.0.