It would be great if there was an animationClass prop that will make styling easier.

Hi,

The first render of a DatePicker component with an onOpen prop throws an error: Unknown event handler property `onOpen`. It will be ignored.

Reproduction:

1. Open https://stackblitz.com/edit/react-xje2zdjc?file=app%2Fapp.tsx

2. The error will appear in the console

Expected behavior:

No errors in the console

I am using KendoReact 10.2 and I am getting several warnings about deprecated Sass methods and syntax including one that is causing an error in the browser and blocks rendering. I used the sass-migrator to try to migrate these methods.

Please upgrade KendoReact so it can work with the latest Vite, React and scss/sass packages without deprecation warnings and errors.
Also fix the React version dropdown in this feedback form. It doesn't show React 19 as an option.

We use "@progress/kendo-react-treelist": "^5.10.1" in our project. Trees are usually placed in flexible containers, and users can reduce their size to 0. At this point, we get an error when calling the tableRowsVirtualization function. I have attached a screenshot at the moment of debugging. You can see that the values of items[0] and lastItem are undefined when the container size approaches 0. I didn't prepare an example to reproduce the error, because I think it's pretty clear that an error occurs here. So the questions are: if this is a bug, is it fixed in the new versions of the package? If there is a possible error on our part or it has not been fixed in the new versions, then what should we do to solve the problem? Thanks

Provide a set of utility functions for safely creating, traversing, updating, and deleting filters inside nested CompositeFilterDescriptor trees.

It would be great if there was a way to customize the flag of the Timeline component

It would be beneficial if there was a mechanism to identify the actual grouping level of each header cell regardless of expansion state, such as exposing a groupLevel property

Please see the example - https://codesandbox.io/p/sandbox/silly-wind-tpfg8n

When column "Unit Price" is locked, while moving the horizontal scroll bar, the group header is sticky (expected behavior), but the group footer is not sticky (wrong behavior).

*** Support ticket created by Telerik by Progress staff ***
*** Please follow-up with additional details, if necessary. Thank you. ***

I want to achieve an improved customization over the font styling of the title and subtitle pieces using the SCSS theme variables. We want to globalize the style changes via SCSS

It would be beneficial if the ExpansionPanel had allowed adding additional header content outside of the built-in title and indicator elements

It would be great if there was a mechanism for customizing the sorting of the ExpansionPanel headers

We should enable the Treelist not to count items on the second level.

*** Support ticket created by Telerik by Progress staff ***
*** Please follow-up with additional details, if necessary. Thank you. ***

It would be beneficial if the Chat component had an `allowDuplicates` prop that would prevent the duplication of uploaded files.

We are using the DateFilter from kendo-react-data-tools to filter Odata Edm.Date fields. Neither the DateFilter nor the Edm.Date fields have a time component, but toODataString from kendo-data-query turns the DateFilter value into a DateTimeOffset e.g. YYYY-MM-DDT00:00:00.000Z.

Is it possible to get a date-only value from toODataString using DateFilter?

It would be great if the MultiSelect component had a valueMap prop exposed.

We are using a customized ChartToolTip with button in our bar chart. However the tab order is not correct for multiple charts. The expect behavior we were told by our accessibility testing team is first chart -> button on tooltip -> second chart -> button on tooltip and so on. The actual behavior is tab shortcut will switch between charts then back to the first chart tooltip element. 

It would be beneficial if we had a kendoSchedulerSlotSelectable exposed similar to Angular.

It would be beneficial if the DateTimePicker had a togglebutton prop so that the button is customizable. 

In the table component, the expand (‘+’) icon still appears even when there’s no data. It would be beneficial if there was a way to hide the icon out of the box.

When a Grid column is auto-sized via double-click on the resizer, the GridColumnResizeEvent does not expose the calculated width of the column. Instead, newWidth is 0 (deprecated) and the columns entry for the target column only reflects the width before resizing. 

It would be beneficial if the auto-sized column width were exposed in the GridColumnResizeEvent (e.g., by updating newWidth or adding a new property)