Bug Report

When the Grid is exported with child columns hidden with Multi-column headers, the columns headers are not exported.

Reproducible

1. Go to this Progress Kendo UI Dojo
2. Export the Grid

Current Behavior

The column headers do not all export:

Expected Behavior

The Grid should export all column headers like when they are not hidden - Dojo :

Workaround

Explicitly set the parent column's exportable configuration to true - Dojo:

$("#grid").kendoGrid({
    columns: [
        { field: "name", title: "Name" },
        {
            title: "Address",
            exportable: true,  //set to true 
            columns: [
                { field: "street", title: "Street", hidden:true, exportable: true },
                { field: "city", title: "City", hidden:true, exportable: true }
            ]
        },
        { field: "phone", title: "Phone" }
    ]
    //....
});

Environment

Kendo UI version: 2026.2.520
jQuery version: 4.0.0
Browser: all

Hi team,

I experience a Content Security Policy issue with the pdf viewer widget.

Dojo: https://dojo.telerik.com/qPYnmOBn

It seems to be dependent of the file though but not quite sure. Try this pdf file : https://www.arcep.fr/uploads/tx_gspublication/referentiel_general_ecoconception_des_services_numeriques_version_2024.pdf

and go to page 20 for instance.

Please advise.

Regards,

Laurent.

To reproduce the issues, open this DOJO that just renders a grid in a dialog.

1. open the dialog
2. focus the "Add" button
3. press TAB until the focus is on the first cell
4. press ARROW DOWN (this focuses the checkbox in the cell below)
5. press TAB

-> the close button of the dialog is focused

The kendo grid's keyboard navigation does not work reliably when rendering a grid inside a dialog. I assume that this is caused by the dialog's focus trap.

To reproduce the issues, open this DOJO that just renders a grid in a dialog.

1. open the dialog
2. focus the "Add" button
3. press TAB until the focus is on the first cell
4. press ARROW DOWN (this focuses the checkbox in the cell below)
5. press TAB

-> the close button of the dialog is focused

Also note that after reloading the DOJO and doing this for the first time, step 3 directly focuses the checkbox while in consecutive runs, the cell is focused.

Bug report

In a Grid with a hidden column, the aggregates in the footer shift to the right if you edit a cell.

Regression introduced with 2023.2.829

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/EXOmOcAs
2. Scroll to the bottom to see the footer
3. Edit a cell

Current behavior

The footer cells shift to the right.

Expected/desired behavior

The footer cells shouldn't shift to the right after updating a cell.

Environment

• Kendo UI version: 2024.1.130
• Browser: [all]

Bug report

The complete event is triggered after each file upload if chunkSize is set.

Reproduction of the problem

1. Open this Dojo example.
2. Select at least two files to be uploaded.

Current behavior

The complete event is triggered for each file after the uploading is done.

Expected/desired behavior

The complete event should trigger only once when the upload process for all files is completed.

Workaround in this Dojo example

Environment

• Kendo UI version: 2020.1.114
• Browser: [all]

Hi Kendo Team ,

I noticed something illogical  in MajorTimeHeaderTemplate , I did console.log on date that used in template and it prints => Fri Feb 01 1980 00:00:00 GMT+0000 (UTC)

it doesnt't give the current dateTime in the MajorTimeHeader

I will include images for that

Dojo exemple => https://dojo.telerik.com/iqakAKog

The DatePicker widget does not focus the input element when the calendar icon is clicked. Because of that, validation errors are persisted even when the value of the input has been filled out correctly. The input needs to be manually focused and then unfocused to get rid of the validation message.

This behavior can be observed on the following demo page:

https://demos.telerik.com/kendo-ui/validator/custom-validation 

The demo should be viewed in mobile mode.

The dropDownList supports several keyboard shortcuts as documented in https://demos.telerik.com/kendo-ui/dropdownlist/keyboard-navigation. However, when e.g. a KeyDown event is triggered (and handled) by the widget, its propagation is not stopped. This behavior can be witnessed in this DOJO.

In our case, we e.g. use dropDownLists inside dialog windows that can be closed via ESC. When pressing ESC while a dropDownList is focused, this not only closes the dropDownList (as expected), but also closes the dialog.

The dropDownList should stop the propagation of events that it handled.

Bug report

When navigating between inputs and after using Shift+Tab for focusing on a previous input the DropdOwnList popup does not close on pressing 'Enter' key.

Reproduction of the problem

1. Open Dojo
2. Focus the text input
3. Press Tab to focus the DropDownList
4. Press shift-tab to focus the text input
5. Press again Tab to focus the DropDownList
6. Press Alt+down to expand the dropdown
7. Press the down arrow to select an option in the dropdown
8. Press Enter key

Current behavior

The popup does not close. If we directly focus the DropDownList and follow steps 6-8 the popup will close.

Expected/desired behavior

The DropDownList should close when pressing the 'Enter' key.

Environment

• Kendo UI version: 2022.3.1109
• Browser: [all]

Bug report

The value of a disabled DropDownList is not announced in the below screen reader -> browser combinations:

NVDA with Chrome
JAWS with Chrome

The value is correctly announced by NVDA in Firefox.

After testing the scenario with the ComboBox, the value was correctly announced in all screen reader -> browser combinations.

Reproduction of the problem

1. Open this Dojo example in Chrome with JAWS/NVDA - https://runner.telerik.io/fullscreen/ERAxiqIy/3
2. Click the Enable checkbox
3. Select a value from the DropDownList
4. Click the Enable checkbox again.
5. Focus the Checkbox and press the down arrow key.

Current behavior

The screen reader announces the disabled state of the DropDownList, but does not announce its value.

Note - the value of the regular select element below the DropDownList is announced.

Expected/desired behavior

The value of the disabled DropDownList should be announced in the above mentioned combinations.

Environment

• Kendo UI version: 2023.1.117
• Browser: [Chrome]

Bug report

If the ColorPicker tools in the Editor are configured to render a gradient, you cannot type in the HEX/RGB inputs.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/AWEmUSOS/7
2. Open one of the Color tools.
3. Try to type in the inputs.

Current behavior

The inputs are not selectable and you cannot type in them.

Expected/desired behavior

The inputs should be selectable so that you can type in them.

Environment

• Kendo UI version: 2023.2.829
• Browser: [all]

Bug report

`DropDownListSelectEvent.dataItem` is undefined when using keyboard to select the optionLabel, but is defined when using the mouse

Reproduction of the problem

Steps

Dojo: https://dojo.telerik.com/IvEXOvUH

Make a selection (e.g. "Apples").
Select the optionLabel item.

Expected

The value of DropDownListSelectEvent.dataItem is the same whether the selection is made via keyboard or mouse (assumedly).
The value of DropDownListSelectEvent.dataItem is clearly specified in the API docs when selecting the optionLabel.

Actual
The value of DropDownListSelectEvent.dataItem is "Select an option…" when selecting with the mouse.
The value of DropDownListSelectEvent.dataItem is undefined when selecting with the keyboard.

Environment
Kendo UI version: 2024.1.130
Browser: [all]

Bug report

When the style attribute is used to style the 'td' elements in the TreeList, the attribute is removed from the rendered markup.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/@NeliK/ulIZuKEG and inspect the

Current behavior

The style attribute is removed.

Expected/desired behavior

The style attribute should persist in the rowTemplate.

Environment

• Kendo UI version: 2024.3.806
• Browser: [all ]

Bug Report

The cascade event is triggered on initialization of the DropDownLists

Reproduction of the issue

1. Open this Dojo - https://dojo.telerik.com/nGNFvRwt
2. Open the browser console

Current behaviour

The cascade event is triggered on initialization

Expected behaviour

The event should be triggered when the value of the "parent" DropDownList is changed.

Bug report
TimePicker does not preserve the new value when dateInput is enabled

Reproduction of the problem

Dojo demo: https://dojo.telerik.com/IOtuzHie

Change the value from the popup window

Expected

The value shall be preserved

Environment
Kendo UI version: 2024.4.1112
jQuery version: 3.4.1
Browser: [all]

Bug report

In a scenario where a Validator is created with validateOnBlur:false, and is used to validate a NumericTextBox, if the component is focused and blurred after validation, the k-invalid class is removed.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/lJzoPddG/3
2. Click the button to validate the fields.
3. Focus and blur the NumericTextBox

Current behavior

The k-invalid class, and the styles associated with it, are removed

Expected behavior

Environment

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

Bug report

When the DropDownList is configured with autoWidth:true, each opening of the component increases the width of the popup with 1px

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/VzPJHcmm
2. Open the DropDownList multiple times

Current behavior

The width of the popup increases with each opening

Expected Behavior

The width should remain the same

Environment

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

Bug report

When the destroy() method is used for kendoPivotConfiguratorV2 and kendoPivotConfiguratorButton an error is thrown.

Reproduction of the problem

1. Open the dojo example - https://dojo.telerik.com/pkBibvww
2. Open the browser console and observe the result

Current behavior

An error: TypeError: Cannot read properties of null (reading 'removeData') is thrown.

Expected/desired behavior

There should be no error, and the configurator and the kendoPivotConfiguratorButton should be successfully destroyed.

Environment

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

Bug report

Grid's Toolbar Columns Menu breaks after setOptions()

Reproduction of the problem

1. Go to and run this Dojo that combines the Toolbar Columns Menu demo and the Persist State demo: https://dojo.telerik.com/hVgwgCdr
2. Click "Save State" so you have some state data to restore later.
3. Click the Toolbar Columns Menu, uncheck "Contact Title", and click "Apply" to hide the column. The column gets hidden without a problem.
4. Click "Load State" to restore the previous state data. The column is displayed again and things are fine.
5. Click the Toolbar Columns Menu, uncheck "Company Name" and "Country", and click "Apply" to hide these columns.
6. Observe only one of these two columns was hidden and the Toolbar Columns Menu remains visible.
Open the Developer Tools, check the Console tab, and observe the error logged: "Uncaught TypeError: Cannot read properties of null (reading 'columns')"
It appears the columns menu's "this.owner" gets set to null at some point in the process of calling setOptions() and never gets set back to a reference of the grid.


Environment
Kendo UI version: 2025.2.702
Browser: [all ]