As per the .NET format support shown here:
http://stackoverflow.com/questions/11731996/string-format-numbers-thousands-123k-millions-123m-billions-123b

And here:
http://msdn.microsoft.com/en-us/library/0c899ak8%28v=vs.100%29.aspx#SpecifierTh

123456789.ToString("#,##0,") will return "123,457".
123456789.ToString("#,##0,K") will return "123,457K".

kendo.format("{0:#,##0,", 123456789) will return "123,456,789".
kendo.format("{0:#,##0,K", 123456789) will return "123,456,789K".

As per the .NET standard, each trailing comma will round off 3 digits, so 123456789.ToString("#,##0,,M") will return "123M".

Bug report

When the data source of the Kendo UI ScrollView is configured to accept a function, two requests are sent. 

Reproduction of the problem

1. Set the read of the data source to function.

2. Set server paging to false (by default is false).

Dojo for reference:

https://dojo.telerik.com/ePIpejar

Environment

* **Kendo UI version:** 2019.3.1023
* **jQuery version:** 1.12.4
* **Browser:** [all] 

Bug report

When using column virtualization in Kendo Grid, the save event returns an incorrect field name. After scrolling to virtualized columns, editing a cell displays the value from a different column.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/ulIlbauD
2. Scroll and edit one of the columns, for example, edit a cell in column 'Field50'.
3. Edit the value and click outside the cell to save

Current behavior

An incorrect value is displayed in the cell:

The field in the save event is not correct; instead, Field48 is logged.

Expected/desired behavior

The correct field should be edited and returned in the save event when editing a Grid with virtual columns.

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Bug report

When the Kendo UI Grid is utilizing localization with group paging, the pager does not translate.

Reproduction of the problem

1. Go to this Progress Kendo UI Dojo.

Current behavior

The Pager's messages are not translated.

Expected/desired behavior

The Grid's pager should translate like when group paging has been disabled. (Dojo)

The issue is a regression starting with 2025.4.1111 version.

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Bug Report

During the Done event for the Kendo UI Wizard, the button argument returns as undefined due to the span element being targeted rather than the button.

Reproducible

1. Go to this Progress Kendo UI Dojo.
2. Follow the wizard steps and click the Done button.
3. The console shows the Button argument return as undefined.

Expected Behavior

The button argument should return the clicked button which raised the event.

Environment

• Kendo UI version: 2025.4.1111
• jQuery version: All Supported Versions
• Browser: all

Bug report

When sorting is enabled for a virtualized Grid with local data, in some cases the Grid does not show correct items when sorted.

Reproduction of the problem

1, Open the Dojo example
2. Scroll to the bottom
3. Sort the Grid

Current behavior

Only the last 3 items are displayed. (screencast)

Note: The issue does not occur every time.

Expected/desired behavior

Enough items to fill the Grid height should be displayed. There should be no blank space without records.

Environment

• Kendo UI version: 2021.2.616
• Browser: [all ]

Description of the occurring behavior

the styling of links is handled inconsistently:

• When you set the cursor inside a link and then change the text-color the color is changed.
• When you select a block of text containing a link and style the entire block of text (e.g. change the color) and then you try to change the color of the link this has no effect.

The issue seems to be that in the first case a span is inserted inside the a-tag, while in the second case a span is created around the a-tag and the styling for the a-tag is then used.

Reproduction of the problem

This can be reproduced in the All Tools demo as shown in the following video.

NOTE: if only the link is selected, or the selection starts or ends with the link, then the link color is changed. The issue is reproducible only when there is selected text before and after the link.

Expected/desired behavior

The color should be applied to the link text too.

Environment

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

The TileLayout is a great way to show data in a dashboard, but lacks a dataSource to allow dynamic generation of them. I have had to create a custom extension that introduces a dataSource, which then utilises `widget.setOptions({ containers: items })`. But this puts too much reliance on custom code and is a worry that it will break between version upgrades. Also, editing one container doesn't allow the refreshing of one tile; I need to reset the whole lot using `setOptions`.

Adding, editing, resizing, and re-ordering are also difficult to implement for a tool that has huge potential.

Hi Telerik Team,

I’m using Kendo UI version 2022.3.1109 with jQuery, and I have implemented a Kendo UI ImageEditor in my application. I would like to restrict the allowed file types when users open an image from their device.

Goal
I want the ImageEditor to accept only a specific set of formats:

• .png
• .jpg/jpeg
• .webp

Current Behaviour

When the user clicks the Open tool inside the Image Editor:

• It allows all file types, including unsupported ones
• There is no configuration option like the accept attribute available in Kendo Upload
  
  I checked the documentation but could not find any built-in way to filter file types for the ImageEditor Open dialog.

Regards,
Amit

Hi Team,

I would like to request a chart which visually displays workflow data similar to a Gantt chart but in pivoted form.  

Thank you!

Bug report

When using the Grid's GetSelectedData method with a selectable column, the method throws an error.

Reproduction of the problem

1. Go to this Progress Kendo UI Dojo
2. Select a row
3. Click Get Select Data

Current behaviour:

The following error message occurs:

kendo.all.js:143633  Uncaught TypeError: Cannot read properties of undefined (reading 'selectedRanges')

Environment

Kendo UI version: 2025.3.812
Browser: [all ]

Bug report

When there are multiple Property Grids on the page, all the Property Grids have the column width as configured for the first one.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/qxeixekp

Current behavior

The second and third PropertyGrids have the same width as the first PropertyGrid, although their configuration is different.

Expected/desired behavior

Each instance should have column widths based on the configuration.

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all]

Bug report

When the TabStrip has an empty dataSource initially, and then a new item is added using the dataSource.add() an error appears in the console and no item is added.

Reproduction of the problem

1. Run the example and observe the console - https://dojo.telerik.com/nzQDTrjN

Current behavior

An error appears in the console, and no item is added.

Expected/desired behavior

An item should be correctly added in the TabStrip.

The issue is a regression starting with the KEndo version 2025.3.825

Workaround

Add an item in the dataSource initially and remove it when needed - Dojo - https://dojo.telerik.com/NgHHVOFy

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Bug report

When a Notification is rendered on the same page as popups (Window, Dialog, etc), it is displayed behind the popup.

Reproduction of the problem

1. Open the Dojo examples - https://dojo.telerik.com/rvoPVbqK and https://dojo.telerik.com/mXdTrXpa

Current behavior

Notification is displayed behind the popups.

Expected/desired behavior

The Notification should be displayed on top of the popups

Workaround

 $('.k-notification').parents('.k-animation-container').css('z-index', 12500)

Dojo - https://dojo.telerik.com/TnVHKzQc

The issue is a regression starting with 2025.4.1111 version.

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Bug report

In some cases, a CSP error - Applying inline style violates the following Content Security Policy directive 'style-src 'self' .... is thrown in the Editor

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/jOwrhome
2. Enter text and click on the tools. Note: the error does not appear consistently; You can follow the steps from the video below to replicate it (clicking on 'bold', 'align', 'unordered list')

Current behavior

CSP Error is thrown - Applying inline style violates the following Content Security Policy directive 'style-src 'self'

Expected/desired behavior

There should be no errors when using the Editor tools.

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Bug report

When the sortable option is disabled, the title in the header is not wrapped in span element with 'k-column-title' class.

Reproduction of the problem

1. Open the Dojo and inspect the titles - https://dojo.telerik.com/hKCCsAOU

Current behavior

Rendering with sortable enabled:

The filtering icon and title have enough space:

Rendering with sortable disabled:

filtering icon overlaps the title in case of long text:

Expected/desired behavior

The rendering should be identical. The header title should be wrapped in a span element with 'k-column-title' class

Workaround for fixing the overlapping issue:

<style>
    .k-grid-header .k-filterable{
      padding-right: calc(1.42857143em + 14px);
    }
  </style>

Environment

• Kendo UI version: 2025.4.1111
• Browser: [all ]

Enhancement

Currently the dialog action buttons can not hold only icons, the API does not provide means to have a button with only an icon or an icon and text. Considering the aforementioned we should extend the API to allow adding of icons inside the action buttons.

Bug Report

When utilizing a scrollable, horizontal Kendo UI Menu, the height of the menu appears to stretch.

Reproducible

1. Go to this Progress Kendo UI Dojo.

Expected Behavior

The Menu's height should not stretch upon initialization as shown in this Progress Kendo UI Dojo.

Environment

• Kendo UI version: 2025.4.1111
• jQuery version: All Supported Versions
• Browser: all

The grid has a number of built in filters, what is not supported is searching for cells that have no value or some value (i.e. NULL or NOT NULL).
This would be a very useful addition.