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

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

Bug report

Spreadsheet cellContextMenu() throws an error

Regression with 2024.4.1112

Reproduction of the problem
Run the Dojo: https://dojo.telerik.com/SlDUjkTQ

Check console

`Uncaught TypeError: spreadsheet.cellContextMenu is not a function`

Environment

jQuery: 3.4.1

Kendo UI version: 2024.4.1112 or newer
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

NORM.S.INV, NORM.INV, and NORM.DIST are officially listed as supported formulas, but they are not functioning properly

Regression bug since 2024.4.1112

Reproduction of the problem

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

Paste: =NORM.S.INV(0.908789)

Result must be 1.3333347

Environment
Kendo UI version: 2024.4.1112
Browser: [all ]

Bug report

In the Spreadsheet, when users scroll horizontally to columns that are not initially visible, then activate Freeze Panes, the Spreadsheet scrollbar behave incorrectly

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/zYbZtYDR.
2. In the Spreadsheet, scroll horizontally to columns that are not initially visible.
3. Activate Freeze Panes.
4. Attempt to continue horizontal scrolling.

Current behavior

When Freeze Panes is activated after horizontal scrolling:

• The Spreadsheet snaps back to the first (leftmost) column, Column A.
• Horizontal scrolling becomes unusable.
• Users cannot navigate to the right-hand columns until Unfreeze Panes is selected.

Expected/desired behavior

• Activating Freeze Panes should retain the current horizontal scroll position.
• Horizontal navigation should remain fully available across all unfrozen columns.
• Freezing should not disable the internal Spreadsheet scrollbar or shift the viewport.

Environment

• Kendo UI version: 2026.1.212
• Browser: [al]

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

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]

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.

Using a datasource on a sheet

Selecting entire sheet and clicking the filter in the data toolbar tab.

The buttons for the columns do not respect the size of rowHeight or headerHeight

Set rowHeight to 20 and i get this 

Bug report

In the Speadsheet, the items of the DropDownButton for the sheet tabs are hardcoded and cannot be translated

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/EtdKrzwo/2
2. Click the DropDownButton for the Food Order sheet

Current Behavior

The DropDownButton's items are not translated

Expected/desired behavior

The DropDownButton's items are not translated

Environment

• Kendo UI version: 2025.3.1002
• Browser: all

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

Reproduction of the problem

Open this web site:
https://demos.telerik.com/kendo-ui/spreadsheet/datasource

And follow the steps provided here:
https://www.screencast.com/t/UdEKYqIve

Current behavior

The first added cell value (or row) is removed when the user deletes an empty row.
If the ID is entered, the result is even stranger:
https://www.screencast.com/t/osmVOiY7al

Expected/desired behavior

It should behave and function like Excel. I think with local/static binding there are no issues.

Bug report

Hyperlinks in a Spreadsheet cell do not work mobile devices.

Reproduction of the problem

1. Open this example on a mobile device - https://dojo.telerik.com/ahixOKep
2. Try to click on the links in the Product column.

Current behavior

The link in the cell does not work.

Expected/desired behavior

The link should work

Environment

• Kendo UI version: 2022.2.510
• Browser: [all]

Bug report

When a border is applied and there are frozen rows/columns the border appears splitted with a white lin in the middle.

Reproduction of the problem

1. Open the Dojo example.

Current behavior

The bottom border and the right border are split with a white line in the middle.

Expected/desired behavior

The border should appear entirely filled with the selected color.

Environment

• Kendo UI version: 2022.2.510
• Browser: [all ]

Hi team,

In kendo spreadsheet if you disable any row by adding enable property to false and apply sort from data tab, then the disable row is changing based on the sort. instead of applying to particular row  it is applying to perticular range and while sorting the row items are changing. The cell properties are not applying there while sorting.

link for example: https://dojo.telerik.com/IkoJeMIz

please let me know if I am doing anything wrong here.

thanks.

Bug report

When the select() method is used in the Spreadsheet changing event wrong cell is selected.

Reproduction of the problem

1. Open the dojo example
2. Select a different cell, change its value, and press Enter

Current behavior

Changing event is fired, but the 'B3' cell is selected instead of the 'B2'

Expected/desired behavior

The correct cell should be selected when using the select method inside the Spreadsheet event handlers.

Environment

• Kendo UI version: 2022.3.913
• Browser: [all ]

Bug report

When the Sheetsbar is hidden the horizontal scrollbar is not adjusted to the bottom of the widget

Reproduction of the problem

1. Run this dojo
2. Note the space below the horizontal scrollbar:
   

Expected/desired behavior

The horizontal scrollbar should be adjusted to the bottom of the widget.

As a possible workaround, when hiding the Sheetsbar add the following styling:

<style>
    .k-spreadsheet-sheets-bar {
      padding: 0;
      border-style: none;
    }
</style>

Environment

• Kendo UI version: 2021.2.511
• Browser: [all]

When values in the sheet are updated using the batch method the DataSource does not update according to changes.

Dojo: https://dojo.telerik.com/@iankodj/IRUdufOx

1. Run the example

2. Check the console showing "no data" and an empty array.

Expected: https://dojo.telerik.com/@iankodj/EKoziCic 

Bug report

Reproduction of the problem

Reproducible in this demo: https://demos.telerik.com/kendo-ui/spreadsheet/datasource

1. Scroll down to row 78
2. Focus A78 and drag to E78. Copy the data
3. Paste over the empty 79 row's first cell
4. Press Ctrl + Z to undo the changes.
5. Open the browser's dev tools network tab and press the "Save" button above the Spreadsheet.

Current behavior

The data cleared by the "undo" shortcut is saved and sent to the server

A different behavior is exhibited if the data is pasted over the row header instead of the row's first cell. Follow the same steps, but on step 3. instead of pasting over the first cell, paste the data over the row 79 header. After undo and then clicking "Save", the fields have null values.

Expected/desired behavior

No data is sent with the request

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all]