Hi team,

Please consider this dojo: https://dojo.telerik.com/zhQuuOhS

Here is the issue:

When validating field on the last line (field: units in stock), the validation tooltip is hidden (due to clipping), user needs to scroll down the grid.

Worse: if you then fill correctly the field and then re-empty the field, the validation tooltip is no more visible (no scrolling even possible in this case), please see screenshot attached.

Is there a way to make the validation tooltip immediately visible after validation takes place ? I mean without the need to scroll.

Best regards,

Laurent.

Reproduction of the problem:

1. Go to ScrollView official demo
2. Open the Developer Tools and select "Slow 3G" from the Network Tab 
3. Click on the arrows quickly -> the images start to repeat while the requests are not completed

Bug report

Reproduction of the problem

1. Run this dojo - https://dojo.telerik.com/maEwRiAJ/2

2. Hover over cell 8

Current behavior

Tooltip extends beyond the viewport and a scrollbar is shown.

Expected/desired behavior

Tooltip should fit the available space

TicketID:

1718387

Environment

• Kendo/Telerik version: 2026.3.811

   

Bug report

Steps to reproduce

1. Open the Spreadsheet demo.
2. Import TestExcel.xlsx.
3. Compare the formula cell results with the same file opened in Microsoft Excel.

Current behavior

After import, some formula cells produce different results than Excel when the intermediate result is very close to zero.

Observed example from the attached file:

• In Excel:

  • E1 = 0
  • E2 = 0
  • F1 = 55110.305475240835

• In Spreadsheet after import:

  • E1 = 0.00000000004366
  • E2 = 0.000000000043660000000000000000
  • F1 = 0

Expected behavior

Spreadsheet should match Excel results for the imported workbook, including cases where formulas evaluate to values extremely close to zero.

Notes

The issue appears related to formula recalculation after import and handling of floating-point precision near zero.

In the attached file:

• The imported numeric inputs are:

  • A1 = 79590.518373344006
  • B1 = 0.16372664029103301
  • C1 = 4
  • D1 = 82665.458212861093

• The formula in E1 is:

  • A1*(1+B1)^(1/C1)-D1

Excel stores the result as 0, but Spreadsheet recalculates it to a very small positive number, which then changes the dependent IF result in F1.

Environment

• Spreadsheet core demo: local reproduction confirmed
• File used: TestExcel.xlsx

Workaround

  <script>
    const CANCELLATION_EPSILON = Number.EPSILON * 4;

    function collapseCancellationError(result, left, right) {
        const scale = Math.max(Math.abs(left), Math.abs(right));

        if (!scale || result === 0) {
            return result;
        }

        return Math.abs(result) <= CANCELLATION_EPSILON * scale ? 0 : result;
    }
    const { defineFunction } = KendoSpreadsheetCommon;
    defineFunction('binary+', function(a, b) {
        return collapseCancellationError(a + b, a, b);
    }).args([
        ['*a', ['or', 'number', ['null', 0]]],
        ['*b', ['or', 'number', ['null', 0]]]
    ]);

    defineFunction('binary-', function(a, b) {
        return collapseCancellationError(a - b, a, b);
    }).args([
        ['*a', ['or', 'number', ['null', 0]]],
        ['*b', ['or', 'number', ['null', 0]]]
    ]);
  </script>

TestExcel.xlsx

Hi,

You prob. already know this, but in Chrome attribute autocomplete should be "disabled" instead of "off" for e.g. combobox - then we don't get the auto fill.

Even thought it has no id nor name - I think it looks at the lavbel - in my case its "Name" and the combobox get a big Chrome auto fill from the address book. Setting it from "off" to "disabled" will disable both auto complete AND auto fill.

The same goes for the AJAX Combobox - will you notify that team too? Current hotfix for that is `$(".rcbInput").attr("autocomplete", "disabled");`

Thanks

/Anders

Bug report

Reproduction of the problem

1. Open and run the Dojo - https://dojo.telerik.com/OXSpsxQu

Current behavior

The segmented control for the views is displayedin the toolbar, although the Scheduler uses a custom toolbar configuration and the Segmented control is not added there.

Expected/desired behavior

Only componentes listed in the toolbar configuration should be displayed

Workaround:

    .k-scheduler-toolbar > .k-toolbar-views-dropdown,
    .k-scheduler-views.k-segmented-control {
        display: none !important;
    }

The issue is a regression starting with 2026.3.811.

Environment

• Kendo/Telerik version: 2026.3.811
• Browser: [all ]

Hi Support,
I have some issues with the copySelectionToClipboard Method for the Grid widget. 

In the first one, the copy function of the table seems to have a problem with locked columns. In the dojo of the first problem the table headers are displayed shifted.

Secondly, grouped table headers are not copied. To see in the second dojo.

Lastly, it should be mentioned that the definition for the copy method is not included in the kendo-ui npm packet. 

Problem 1:
https://dojo.telerik.com/OBOQemUm

Copy result in Excel:

Problem 2:
https://dojo.telerik.com/OBOQemUm/2

Copy result in Excel:

Best regards,

Jonas

On this page Demo of core features in jQuery Circular Gauge widget | Kendo UI for jQuery (telerik.com) there is a link to the client side API documentation (big blue button "API Reference") but the link returns a 404 error.

This is the page it links to https://docs.telerik.com/kendo-ui/api/dataviz/circulargauge.

Hi,

This is only i minor issue, since the actual method seems to be working fine. I just thought i would bring to you attention that the demo page for the JQery method getOptions is havinf issues.

https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/methods/getoptions

Steps to reproduce:

1. Navigate to the link
2. click on the preview tab of the example

Below are some of the more noteworthy errors and warnings:

• jquery.js?020081004:3     GET https://docs.telerik.com/kendo-api/announcements/kendo-ui 404
• VM359 kendo.all.min.js:9 License activation failed for @progress/kendo-ui v2023.2.606
  No license found.
  See https://docs.telerik.com/kendo-ui/intro/installation/using-license-code for more information.

Create a grid with batch set to true and update a field value using the set method of the kendo.data.Model object in JavaScript. The grid cell will be marked as dirty but the "Save changes" or "Cancel changes" buttons will not display. If you click into another editable cell, then the buttons will display.

See https://dojo.telerik.com/TwTMSsrB and attached example.html.zip.

See attached image.png for example image.

In Kendu UI 2026 Q2 (version 520) file kendo.all.d.ts

The interface IChatOptions has a duplicate defintion for the messageTemplate

Line 3849:

messageTemplate?: MessageTemplateFunction | null;

Lines 3916/3917   

/** Template for rendering individual messages */
messageTemplate?: MessageTemplateFunction | null;

Describe the bug
When the Spreadsheet has locked columns and columnWidth is set, but the width of the locked exceed the width of the Spreadsheet, the widget is not rendered correctly.

To reproduce
Steps to reproduce the behavior:

1. Run the Dojo - https://dojo.telerik.com/@NeliKondova/aXUvAKeB

The columns of the Spreadsheet are visible even outside of the component.

Expected behavior
The columns should be limited to the Spreadsheet width

Affected package (please remove the unneeded items)

• theme-default
• theme-bootstrap
• theme-material

Affected suites (please remove the unneeded items)

• Kendo UI for jQuery

Affected browsers (please remove the unneeded items)

• All

Steps to reproduce the behavior:

1. Run the jQuery Virtualization Demo
2. Open the popup of the Widget

Expected behavior
The header and rows shouldn't overlap

Screenshots

Affected package

• seems to affect all Themes

Affected suites

• Kendo UI for jQuery

Describe the regression
Using the latest version of Kendo UI, if the Kendo UI TabStrip is set to scrollable: false, the tabs flex styling/structure is affecting the appearance of the tabs.

To reproduce
Steps to reproduce the behavior:

1. Go to the following Progress Kendo UI Dojo

Expected behavior
Previously in Kendo UI version 2021.2.616, setting the scrollable to false will wrap the tabs above each other.
Working example

Screenshots

Affected suites

• Kendo UI for jQuery

Affected browsers

• All

Build system information

• Not Applicable

From package "@types/kendo-ui": "2020.1.0" i found;

class Connection extends Observable {


        options: ConnectionOptions;

        dataItem: any;
        from: kendo.dataviz.diagram.Shape;
        sourceConnector: kendo.dataviz.diagram.Connector;
        targetConnector: kendo.dataviz.diagram.Connector;
        to: kendo.dataviz.diagram.Shape;

        constructor(options?: ConnectionOptions);

The constructor is not correct, it has to be like all example you propose: https://docs.telerik.com/kendo-ui/api/javascript/dataviz/ui/diagram/methods/addconnection

Please correct typings as soon as possible, it drives me in a use that doesn't works

Hi All,

Datepicker is closing after clicking month or year not waiting until selecting the date.

We are using IPAD IOS 13.2.2 version and loading the data in desktop website in IPAD. Dojo also not working properly in IPAD with desktop mode.

Thanks,

Srikanth.K

Hello, the Excel Export doesn't export the columns headers sums (view in image).

Is it possible export to Excel columns headers sums?

Describe the bug
In IE11 on resizing horizontally the browser window, the text of the ToolBar's tools overlaps.

To reproduce
Steps to reproduce the behavior:

1. Open: dojo example in IE11.
2. Resize the browser window making it narrower.

The tools size is not properly calculated and text overlapping can be observed (see the screenshot linked below). Overflow hidden is not set to the button tool and the k-input elements are resized on resizing the browser window.

The following CSS rule can be used as a workaround:

.k-toolbar .k-button,
.k-toolbar .k-input {
  overflow: hidden;
  flex: 0 0 auto;
}

Expected behavior
The ToolBar tools should properly resize on browser window resize. No text overlapping should occur.

Screenshots
Screenshot.

Affected package (please provide)

• theme-default
• theme-bootstrap
• theme-material

Affected suites (please provide)

• Kendo UI for jQuery

Affected browsers (please provide)

• IE version: 11

Build system information (please provide)

• OS: Windows
• Node version: N/A
• NPM version: N/A

Additional context
N/A

https://dojo.telerik.com/iyEXeDoH

video to understand the exact behaviour

https://drive.google.com/file/d/1yN3hbYqkdaN8EPT1am7szt7Gvgr07Rnz/view