Bug report

Reproduction of the problem

1. Open the https://dojo.telerik.com/SSFszYRK or https://dojo.telerik.com/yYFBekrt
2. Copy some text
3. Select part of the text in the Editor and try to paste using Ctrl + V

Current behavior

Currently, the highlighted (selected) text dissapers.

Expected/desired behavior

The selected text should not dissapear and the content of the Editor should remain unchanged.

Workaround

kendo.ui.editor.Clipboard.fn.onpaste = function(){
        if (this.editor.body.contentEditable === "false" || this.editor.body.contentEditable === "inherit" ) {
          return;
        }
      }

Environment

• Kendo/Telerik version: 2026.2.520
• Browser: [all ]

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

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

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

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

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 value of the widget is set in the dataBound event handler the filtering events is fired and e.filter is undefined

Reproduction of the problem

1. Open the Dojo
2. Open the browser console and type something in the MultiSelect to filter the data.

Current behavior

The filtering event is fired a second time and the second time the e.filter is undefined.

Expected/desired behavior

Double-checlk if the filtering event should be fired a second time.
The e.filter and e.sender.dataSource.filter().filters[0] should return the same value.

Environment

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

Bug report

When used in a regular HTML form, the CheckBox doesn't get reset by the Reset button.

Workaround: Consider using the Kendo Form instead of a regular HTML form.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/ureSOHoB/5
2. Click the Reset button

Current behavior

The CheckBoxes don't reset when clicking the Reset button

Expected/desired behavior

The CheckBoxes should reset when clicking the Reset Button

Environment

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

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

Spreadsheet validation on datatype=list, values in the dropdown are parsed to numbers. Numeric strings are automatically formatted by removing the heading zero.

Reproduction of the problem

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

                  validation: {
                      dataType: "list",
                      showButton: true,
                      comparerType: "list",
                      from: "{ \"001\", \"002\", \"Baz item 3\" }",
                      allowNulls: true,
                      type: "reject"
                    } 

The bug is a regression, formatting is different with a 2017 version: https://dojo.telerik.com/sCvgBzBa/5

Environment
**Kendo UI version: 2025.1.211
**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]

I am using the Kendo-UI Grid's resizeColumn method do change column widths programmatically (e.g., to distribute column widths by our own custom rules). I have noticed that doing so sometimes leads to unexpected results as demonstrated in this DOJO:

Assume a grid with two columns: one has a fixed size of 200px and the other has no explicit width set.

In the first example, we programmatically set the first column's width to 200px (which should not change anything since the column already is 200px wide. 

grid.resizeColumn(column, 200);

This works as expected.

In the second example, we programmatically set the first column's width first to 20px and then immediately to 200px. I would expect the final outcome to be the same, since the second column should compensate.

grid.resizeColumn(column, 20);
grid.resizeColumn(column, 200);

However, the second column does not shrink and the overall grid grows larger instead. Doing this repeatedly causes the columns to grow larger and larger over time.

Of course, this is a simplified example and I do not call resizeColumn() twice right after each other.

Bug report

When a DropDownTree is placed in a Kendo Dialog, an alert about 'Blocked area-hidden...' element appears in the console once the DropDownTree is opened.

Reproduction of the problem

1. Run the Dojo - https://dojo.telerik.com/RyeUSdVM
2. Open the Dialog and then open the DropDownTree.
3. Select an item in the DropDownTree.

Current behavior

A warning Blocked aria-hidden on an element because its descendant retained focus. The focus must not be hidden from assistive technology users. Avoid using aria-hidden on a focused element or its ancestor.... appear

Expected/desired behavior

There should be no warnring about hidden elements in the console.

Environment

• **Kendo UI version:**2025.3.1002
• Browser: [all ]

Hi!

I have noticed the following behavior of the Kendo-UI MultiSelect widget (reproducible in this DOJO):

1. focus the button
2. click on the X button of the selected tag in the MultiSelect to remove it

-> the button is still focused

The user has interacted with the MultiSelect, so it should grab the focus. Since the tag is removed, I would have expected the whole widget to be focused instead. At least this is what happens when clicking the "clear" button.

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

Dropdown Not Visible in Frozen Pane in Kendo jQuery Spreadsheet

Reproduction of the problem

Dojo example - https://dojo.telerik.com/mLetbVPM

Environment
jQuery: 3.7.0
Kendo UI version: [all]
Browser: [all]

Bug report

If a Scheduler event's start time is set differently than :00 or :30, the event will be dropped in an incorrect slot when snap is enabled. The start time in the hint is also incorrect.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/oSaQUCOp/13
2. Drag the event to 2:00 AM and drop it. Notice that the start time in the hint is also incorrect when the event is over the 2:00 AM slot.
3. Drop the event

Current behavior

The event will be placed at 2:19 AM instead of at 2:00 AM

Expected/desired behavior

The event should be placed at the dropped slot.

Environment

• Kendo UI version: 2024.1.319
• Browser: [all]

Bug report

Grid rows could not be properly selected on iPad

Reproduction of the problem

1. Open the dojo on iPad - https://dojo.telerik.com/gWsPhtrv
2. Try to select a row.

Current behavior

The rows could not be selected.

Expected/desired behavior

It should be possible to select a row in the Grid when it is loaded on iPad.

Used device for testing: iPad Pro iOS18.6

Environment

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

Bug report

Reordering using clickMoveClick in the Grid is very inconsistent.

Reproduction of the problem

1. Open the Drag and Drop Grid demo - https://demos.telerik.com/kendo-ui/grid/drag-drop
2. Try reordering a row using click-move-click

Current behavior

The targeted row is not being reordered

Expected behavior

The targeted row should be reordered

Environment

• Kendo UI version: 2025.1.211
• Browser: [all]