Bug report

When a Dialog is opened over Kendo Window, the focused element is not persisted after Alt + Tab.

Reproduction of the problem

1. Open the example - https://runner.telerik.io/fullscreen/xqMSPXPe.
2. Open the Window and then the Dialog.
3. Tab to focus the second input
4. Alt+Tab out of the browser window to another application.
5. Alt+Tab back to the browser.

Current behavior

The focus is not persistent.
In case the Dialog is not placed in a Window and the same steps are followed, the focus is persisted dojo.
screencast - https://go.screenpal.com/watch/cTQqIunDnRD

Expected/desired behavior

The focus should be persistent when changing the open app by using Alt + Tab.

Environment

• Kendo UI version: 2025.3.825
• Browser: [all ]

Bug report

The label of some of the group fields in the table wizard are not properly aligned

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/IXvPpgtT
2. Click the 'create table' tool and then 'Table Wizard'

Current behavior

Currently, the labels in the Cell Padding and Cell Properties sections are not correctly aligned

Expected/desired behavior

The issue is a regression starting with 2025.3.812

Workaround

execute: function (e) {
              console.log(e.name);
              if (e.name == "tableWizardInsert" || "tableProperties") {
                setTimeout(function () {
                  debugger;
                  $(".k-form-fieldset .k-d-grid .k-form-field:eq(0)").addClass(
                    "k-col-span-full",
                  );
                });
              }

              if (e.name == "tableCellProperties") {
                setTimeout(function () {
                  $("#k-cell-properties .k-form-field:eq(0)").addClass(
                    "k-col-span-full",
                  );
                });
              }
            },

Dojo - https://dojo.telerik.com/IXvPpgtT

Environment

• Kendo UI version: 2025.3.825
• Browser: [all ]

Currently, the Kendo UI RangeSlider provides a single-colored track (.k-slider-track) with a separate style applied only to the selected range. However, in many modern design requirements, there is a need to split the track into multiple colored sections (e.g., 3 or more segments with different colors) to visually represent thresholds, ranges, or categories.

Example Use Cases:

• Displaying low, medium, and high ranges with green, yellow, and red colors.

• Visualizing different risk or performance levels directly on the slider track.

• Providing a better UI experience by mapping ranges to business values.

Requested Feature:
Add native support to configure multiple color segments within the RangeSlider track (either via configuration options or styling hooks). Ideally, developers should be able to specify:

• Number of segments.

• Color for each segment.

• Segment boundaries (percentage or value-based).

Workarounds Tried:
Custom CSS overlays and pseudo-elements can partially simulate the effect, but they are not reliable or fully aligned with the slider’s rendering behavior.

Impact:
This feature would enhance usability and visualization, making the RangeSlider more flexible for dashboards, financial apps, performance monitoring, and other business-critical UI scenarios.

Reference:
Please find an attached image illustrating the requested multicolored track (example with 3 segments: green, yellow, and red).

Bug report

Dragging a card in the TaskBoard selects text in other cards

Reproduction of the problem
Open the next demo: https://demos.telerik.com/kendo-ui/taskboard/templates

Drag a Card and observe the automatic selection

Expected/desired behavior
No text shall be highlighted

Environment
Kendo UI version: 2024.3.1015
Browser: [all ]

Bug report

In a Grid with filterable set to "row" and reorderable enabled, if you type something in the filter input and try selecting the text with the mouse, the column is getting dragged.

Regression introduced with 2025.2.520

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/rXwoFtKi/4
2. Type something in the filter input, and try selecting the text using the mouse

Current behavior

The column is being dragged, preventing you from selecting the text by dragging the mouse over it

Expected/desired behavior

The column shouldn't be dragged.

Environment

• Ticket ID: 1693167
• Kendo UI version: 2025.2.702
• Browser: [all]

Bug report

When a column in the Grid is configured with a group template, updating a cell doesn't update the value of the group template.

Regression introduced with 2024.1.319

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/JukWtLSF/2
2. Group the data by the name column
3. Edit a cell in the salary column

Current behavior

The value of the group template in the Total column is not updated as per the salary column

Expected/desired behavior

The value of the group template in the Total column should be updated as it is calculated using the Salary column

Environment

• Kendo UI version: 2025.1.227
• Browser: [all]

Bug report

The Validator validates a disabled Upload

Reproduction of the problem

1. Open the Dojo example and click the 'Submit' button - https://dojo.telerik.com/ceKdJFuW.

Current behavior

The Upload is validated although it is disabled.

Expected/desired behavior

Disabled elements should not be validated.

The issue is a regression starting with 2025.2.520 version.

Environment

• Kendo UI version: 2025.2.702
• Browser: [all ]

We have a column in our grid bound to a complex JSON object. When a different column's value is changed, we need to change the nested properties in the complex JSON object.

To do this, in the grid's Save event, we are calling model.set("theComplexObject.NestedProperty", newValue). However, doing this does not automatically update the UI for that row's cell. Furthermore, it never seems to mark the column dirty. Manually calling grid.refresh() will fix the issue, but the grid we are working on has a lot of columns and it adds a performance hit.

This approach works for all of our other columns that do NOT use complex objects. They correctly show the dirty flag and new model value after the save operation completes.

Below is a Dojo example with the save event wired up and a complex name column. It's worth mentioning that the dirty flag also doesn't appear to be working on the eye color column. This may be another bug introduced in a newer version of Kendo.

https://dojo.telerik.com/ZHkxwJee

• Change the age for a column and click off the cell. The eyeColor updates, but the name does not. The dirty flag gets put in the first cell for some reason (this happens when updating the second row too... it adds the dirty flag to the first cell in the first row).
• Enabling the currently commented line that does e.sender.refresh() will fix the display issues, but the dirty flag still doesn't show for the name column.

### Bug report

The Validator shows a duplicated error message when validating a CheckBox.

### Reproduction of the problem

1) Create a standard HTML form with a checkbox, which has two inputs - a visible one with value="true" and a hidden one with value="false" (this is the generated HTML markup when using <input asp-for="@Model.IsChecked" /> or Telerik UI for ASP.NET Core CheckBox component).

2) Initialize a Kendo UI Validator on the form and create a custom rule for the checkbox editor.

3) Submit the form and review the duplicated error message in the validation summary. The Validator validates both hidden and visible inputs.

A Dojo sample for reproduction: https://dojo.telerik.com/YoLKDPZQ

### Expected/desired behavior

A single error message must be displayed when the checkbox is not checked and the form is submitted.

### Environment

* **Kendo UI version: 2025.2.702
* **jQuery version: 3.7.1
* **Browser: [all]

We would like the ability to execute custom actions once a control has been fully initialized and rendered.

Use Case
On our login page, we use the Form control. After the Form control is created, we need to reposition our SSO buttons so that they appear beneath the default buttons rendered by the form. Without a reliable event, it is difficult to determine when the control is ready for safe modification.

Proposed Solution
Introduce a Created event (or similar) that is triggered once the control is fully rendered. This event would provide a hook for developers to perform additional UI adjustments or integrate custom functionality.

Reference
Syncfusion ASP.NET Core controls provide this functionality through a Created event.

Bug report

When a Grid is set to readonly mode, but it is also navigatable, and the user clicks on a cell and presses Tab, the next cell enters editable mode.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/HXzAIqWR/3.
2. Click in a cell and press Tab.

Current behavior

The cell is editable.

Expected/desired behavior

When the Grid is in readonly mode, it should not be editable when navigating using the tab key.

Environment

• Kendo UI version: 2025.3.825
• Browser: [all ]

Bug report

Spreadsheet  render event does not fire since 2025.2.520

Reproduction of the problem
https://demos.telerik.com/kendo-ui/spreadsheet/events

Expected/desired behavior
Render event must fire initially.

The issue is a regression starting with 2025.2.520 version.

Environment
Kendo UI version: 2025.2.520
Browser: [all ]

Hi folks,

I am using the Gantt control and somtimes, I correctly do not have any data to show in it.

In this case, in the left-side of the Gantt (which is technically a Grid), the message "No records to display" is shown.

Since I am using Kendo with kendo.culture('de-CH') (Swiss German) and also the Swiss German messages, I would expect the message to be translated there as well.

Especially, when I am looking into the messages-file (https://kendo.cdn.telerik.com/2021.1.330/js/messages/kendo.messages.de-CH.min.js) and it does in fact contain the translation for the Grid's noRecords. And it's also there in the JavaScript code when having the Swiss German culture loaded:

console.log(kendo.ui.Grid.prototype.options.messages.noRecords);

Could you please have a look at this and make the Gantt component respect the translations?

For better illustration, I have prepared the following Dojo, that uses Swiss German culture and displays an empty Gantt chart: https://dojo.telerik.com/iXuKeYaZ

As I ran into this problem while using Telerik for ASP.NET Core, I am looking forward to a solution that that works there too.

Thanks in advance!

Kind regards,

Janick

Bug report

When a user clicks on a locked column header (for example for sorting), the focus unexpectedly shifts to the first unlocked column instead of remaining on the clicked header.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/bZUXgWQT.
2. Click on the ID or Name header.

Current behavior

The visual/keyboard focus immediately moves to the first unlocked column. If the user clicks the second locked column, the focus shifts to the second unlocked column.

Expected/desired behavior

Clicking on a locked column should retain focus on that column, not move to another grid column.

Regression

The issue is a regression starting with 2022.3.913 version

Environment

• Kendo UI version: 2025.2.520
• Browser: [all ]

As all grids, the kendo Gantt chart's rows change their color when hovering. However, the background overlaps the border between columns and makes them disappear for the hovered row.

You can reproduce the described behavior by hovering one of the rows in this DOJO.

Bug report

When you use the setOptions method on the DateTimePicker, the selected date is lost

Regression introduced with 2024.4.1112

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/RCgGUwDW/9
2. Open the DateTimePicker to check the selected date
3. Select the AM checkbox, which will call the setOptions method, and open the DateTimePicker again

Current behavior

The selected date is lost

Expected/desired behavior

The selected date should be persisted

Environment

• Kendo UI version: 2025.3.812
• Browser: [all ]

Slider seems to only output numbers, I want to use it for date ranges, ala mint.com.

Hi Team,

I would like to request the source code from the AI Service from the Kendo UI Grid demos be available to download.  

Thank you!

Bug report
Setting `autoWidth = true` breaks height in mobile adaptiveMode

Reproduction of the problem
https://dojo.telerik.com/wUbmMdkt

autoWidth: true"

autoWidth: false

Environment
Kendo UI version: [all]
Browser: [all ]

Bug report

MVVM Textbox doesn't bind the value correctly to the viewModel on iOS devices in Safari

Regression introduced with 2021.3.1207

Reproduction of the problem

1. Open this Dojo example on iOS device in Safari - https://dojo.telerik.com/NpVbVrsn
2. Type some text in the input
3. Click the button

Current behavior

The value is undefined

Expected/desired behavior

The value should match the input text

Environment

• Kendo UI version: 2025.2.520
• OS: iOS
• Browser: Safari