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

Bug report

Reproduction of the problem

Run this dojo - https://dojo.telerik.com/MkKhDjxX

The results are different when using the same values in Excel.

Current behavior

Result comparison for cells with numeric values

Result comparison for cells with text values

TicketID:

1715542

Environment

• Kendo/Telerik version: 2026.2.520

We're using the kendo spreadsheet with validation.

There's a cell that validates against a list of values.

The list of values can be up to 50 values or so.

It would be beneficial if there is a scrollbar for the dropdown, similar to the Excel behavior.

Reproduction of the problem

1. Run this sample
2. Select first row
3. Delete the row
4. Select range A1:C3
5. Apply borders
6. Select row 3
7. Delete the row

Current behavior

Top border of cell B1 disappears

Expected/desired behavior

Borders are persisted

TicketID:

1708030

Environment

* **Kendo UI version:** 2025.4.1217

Hi Team,

I would like to request to include the PMT function for the Kendo UI Spreadsheet.

Thank you!

Bug report

In the Spreadsheet, if you attempt to delete a row that contains a disabled cell, the operation is pushed in the undo stack. Pressing the undo button inserts a copy of the row with empty disabled cell.

Reproduction of the problem

1. Open the Disabled Cells demo - https://demos.telerik.com/kendo-ui/spreadsheet/disabled-cells
2. Select a row
3. Right-click on the row and press Delete from the ContextMenu
4. Click the undo button

Current behavior

A new row is inserted above the selected row, as the unsuccessful delete operation is pushed in the undo stack

Expected/desired behavior

The unsuccessful delete operation shouldn't pushed in the undo stack

Environment

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

Bug Description

When you add a filter to a column on the spreadsheet component, only the down arrow icon part of the filter button is clickable, not the entire button.

Steps to Reproduce

1. Open the Dojo - https://dojo.telerik.com/dmrXJIdC
2. Try to click on the filter buttons (.k-spreadsheet-filter)

Expected Behavior

The filter menu is not opened unless we click on the icon.

Actual Behavior

The filter menu should open when the button is clicked.

Bug Description

When cell with border is cut in the Spreadsheet, the border is also removed from the next cells.

Steps to Reproduce

1. Open the Dojo - https://dojo.telerik.com/miEJlUWH
2. Cut cell B2 using Ctrl +X

Expected Behavior

The cell A2 should have a right border, cell C2 should have a left border, etc...

Actual Behavior

The next cells borders are cut as well

Environment

• Kendo UI version: 2025.1.227

Bug report

Data validation should not require DATEVALUE("") in Start and End inputs when `Date` is selected

Reproduction of the problem

https://demos.telerik.com/kendo-ui/spreadsheet/index

1. Select an empty cell
2. Click Data validation
3. Set Start: DATEVALUE("1/1/2024") and End: DATEVALUE("2/2/2025")
4. Automatic Hint message looks like: between DATEVALUE("1/1/2024") and End: DATEVALUE("2/2/2025")

Expected
Generated hint message shall not contain DATEVALUE("")


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

Hi Team,

We are using the Kendo Spreadsheet and would like to request a feature to display a character limit indicator while the user is entering data in the cell. This is to prevent users from exceeding the character limit of a cell.

Requirement:

• When the user starts typing in a cell, it should display a live character count e.g. "10/100" if the user has entered 10 characters and limit is 100.
• Once the user reaches the maximum limit (e.g. 100/100), further input in the cell should be restricted.

Thank you!

Hi Team,

I would like to request emf image support for the Kendo UI Spreadsheet.  If that is not possible, I would like to request a way to handle if the image is in a non-supported image type - such as a console error.  

Thank you!

Bug report
Subtotal Function in Spread returns wrong calculation on hidden columns. In Excel hidden columns does not reflect the result

Reproduction of the problem

Expected

Same result as in Excel

Environment

jQuery: 3.4.1

Kendo UI version: 2024.4.1112
Browser: [all]

Hi Team,

I would like to request a built-in way to set a reject type validation when a value is programmatically set in the Kendo UI Spreadsheet.  Currently, it only sets a warning type as shown in this Kendo UI Dojo.  

Thanks!

When a cell is copied to another cell by using the 'auto-fill' option, the format and validation from the initial cell is applied to the target as well, as described in the documentation.

- https://docs.telerik.com/kendo-ui/controls/spreadsheet/end-user/user-guide#other

I would like the possibility to persist the format and validation of the targeted cell and if for example non-valid data is dragged and dropped in a cell, the content to be rejected based on the targeted cell validation. 

Hi Team,

I would like to request to include the Embed function for the Kendo UI Spreadsheet to include objects such as PDF files into the Spreadsheet. 

Thank you!

Hi Team,

I would like to request the open button for the Kendo UI Spreadsheet's toolbar to fully utilize a Kendo UI Button rather than a native input button.  One benefit would be to help provide a localization message with ease.  

Thank you!

Bug report

When trying to import an Excel document into the Kendo UI Spreadsheet with a missing/corrupt image reference, the file will not show.

Reproduction of the problem

1. Import an XLSX file with a corrupted image into the Kendo UI Spreadsheet demo. (See ticket 1661911 for an example document)

Current behavior

The Kendo UI Spreadsheet fails to load the document.

Expected/desired behavior

The Kendo UI Spreadsheet should handle the error and load the Spreadsheet data without the image.

Environment

• Kendo UI version: 2024.3.806
• jQuery version: All Supported Versions
• Browser: all