29 Jan to 05 Feb 2026: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/dynamically-setting-step-value-kendo-chart-labels
Summary: Learn how to dynamically set axis label intervals in Kendo UI jQuery Charts by computing and applying categoryAxis.labels.step (and valueAxis.labels.step) at runtime. The article shows using render/resize events to calculate a step based on chart width and category count, then updating the chart via chart.setOptions to prevent label overlap.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/preventing-unsaved-changes-grid-filtering-searching
Summary: Explains how to prevent data loss from unsaved edits in a Kendo UI for jQuery Grid when users filter or use the toolbar search. You intercept filtering/searching (Grid filter/dataBinding events and the SearchBox), detect dirty state with dataSource.hasChanges() or an active edit row, then cancel the operation, prompt to save or discard, and optionally call dataSource.cancelChanges() before proceeding.

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19 Jan to 26 Jan 2026: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/chart-shading-between-lines
Summary: Learn how to shade the area between two line series in a Kendo UI for jQuery Chart by adding a rangeArea series whose data points use the per-category min/max (from/to) values from the two lines. The article shows how to compute the range dataset, align categories, configure color/opacity and borders, and preserve the original line series and tooltips so the filled band accurately follows intersections and crossings.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/grid/export/excel-export-customization
Summary: Configure the Kendo UI for jQuery Grid excel options (fileName, allPages, filterable, proxyURL, forceProxy) to control the export scope and the generated .xlsx file. Handle the excelExport event to access e.workbook (kendo.ooxml.Workbook) and programmatically modify the workbook—add/remove rows and columns, set number formats and cell styles, adjust column widths, merge cells, and customize headers/footers—before saving. You can also include or exclude hidden columns and filters, and choose between exporting all pages or only the current view.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/remove-html-kendo-ui-jquery-grid-excel-export
Summary: Learn how to remove HTML tags from Kendo UI for jQuery Grid Excel exports so template-rendered cells export as plain text. You’ll hook into the excelExport event, iterate e.workbook.sheets[n].rows and cells, detect string values with markup, and replace each cell.value with stripped text (for example, via a temporary DOM element) to produce clean CSV/XLSX output.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/merging-rows-excel-export-kendo-ui-jquery-grid
Summary: Learn how to merge cells across adjacent rows in a Kendo UI for jQuery Grid Excel export by handling the excelExport event and modifying the generated workbook. The article walks you through computing contiguous ranges (for example, identical values in a column), adding them to sheet.mergedCells using Excel addresses like A2:A5, adjusting cell values/formatting as needed, and accounting for header rows when calculating row indices.

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05 Jan to 12 Jan 2026: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/map/azure-tiles
Summary: Configure the Kendo UI for jQuery Map to use Azure Maps raster tiles by adding a tile layer whose urlTemplate targets the Azure Maps tile endpoint with your subscription key. You’ll map the Kendo template tokens (#= zoom #, #= x #, #= y #) to Azure’s z/x/y parameters, choose a tilesetId (for example microsoft.base.road or microsoft.imagery), and set attribution, 256 tile size, and zoom bounds, with notes on Azure Maps key usage and allowed domain restrictions.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/grid/binding/web-api-binding
Summary: You bind the Kendo UI for jQuery Grid to ASP.NET Web API by including kendo.webapi.js and setting the DataSource type to "webapi". You configure RESTful transport (GET, POST, PUT, DELETE), enable serverPaging/serverSorting/serverFiltering, and define the schema/model so the Grid sends paging, filtering, and sorting parameters correctly and reads the data and total count from the API response.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/instantiate-kendo-ui-jquery-mediaplayer-mvvm
Summary: You will learn how to instantiate the Kendo UI for jQuery MediaPlayer in an MVVM view when data-role initialization is not supported by creating a custom MVVM binder that constructs the widget and binds an observable media object to its options. The article shows how to keep the player synchronized with the view model by reacting to changes and calling setOptions for properties like source, poster, autoPlay, and mute.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/combine-toolbar-functions-dropdown-kendo-ui-jquery-spreadsheet
Summary: Learn how to customize the Kendo UI for jQuery Spreadsheet toolbar to combine common functions into a single dropdown that inserts formulas into the active cell (e.g., SUM, AVERAGE, COUNT, MIN, MAX). You’ll configure a custom toolbar item and wire its selection events to the Spreadsheet API so each dropdown item applies the corresponding formula to the current selection or range.

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22 Dec to 29 Dec 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/displaying-blank-items-as-blank-in-kendo-ui-for-jquery-multiselect
Summary: Learn how to make empty-string or null items display as visually blank in the Kendo UI for jQuery MultiSelect, both in the dropdown list and in the selected tags. You’ll customize itemTemplate and tagTemplate to conditionally render a non-breaking or zero‑width space for blank values so items remain selectable without showing “undefined” or placeholder text.

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15 Dec to 22 Dec 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/filemanager-azure-blob-storage
Summary: Learn how to connect the Kendo UI for jQuery FileManager to Azure Blob Storage by implementing server-side endpoints that map the FileManager transport (read, create folder, upload, delete, download) to Azure Storage SDK operations. You’ll list blobs by prefix and return the expected FileManager schema, handle virtual folders and recursive deletes, generate SAS URLs for secure downloads/uploads, configure CORS, and wire up the client-side DataSource to those endpoints.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/change-contextmenu-item-text-kendo-ui-jquery-grid
Summary: Explains how to dynamically change a Kendo UI for jQuery ContextMenu item’s text when the menu is bound to a Grid. You handle the ContextMenu open event, get the clicked row’s dataItem from the Grid, locate the target menu item (by id or index), and update its label via the API or by setting the .k-link text. This enables context-aware labels (for example, including the row’s field values) at runtime.

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01 Dec to 08 Dec 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/show-week-number-scheduler-timeline-month-views
Summary: This article shows how to display week numbers in the Kendo UI for jQuery Scheduler Timeline and Month views by customizing the rendered header in the dataBound/navigate events. It computes ISO (or culture-specific) week numbers for the visible dates using kendo.date utilities and injects them into the DOM so the week labels stay in sync as the user navigates or resizes.

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24 Nov to 01 Dec 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/compact-number-formatting
Summary: Learn how to format numbers in compact notation (K, M, B) in Kendo UI for jQuery using Intl.NumberFormat with notation: "compact" and a reusable formatter function. The article shows how to integrate the formatter into Grid column templates, Chart labels, and other widget templates with culture-aware output and precision control, and notes browser support considerations. Use it to keep numeric displays concise without changing the underlying data.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/automatic-scrolling-taskboard-drag-drop
Summary: Learn how to add automatic scrolling to the Kendo UI jQuery TaskBoard during card drag-and-drop. You detect the pointer near the column or TaskBoard container edges and programmatically adjust scrollTop/scrollLeft (e.g., via a timer or requestAnimationFrame) while the drag is active to enable vertical and horizontal scrolling. The article wires this logic into the TaskBoard’s drag/sort events so you can reliably move cards to off-screen targets across long columns.

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10 Nov to 17 Nov 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/ai-components
Summary: Integrate Kendo UI for jQuery AI components—AI Prompt and AI Chat—with LLM providers (OpenAI, Azure OpenAI, custom endpoints) through a backend proxy. The article explains configuration and event handling (prompt templates, system messages, streaming responses, conversation history, request/response/error events) and covers API key security to implement AI chat and prompt workflows in your app.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/kendo-ui-clear-icon-span
Summary: This article explains how Kendo UI for jQuery renders the clear (x) icon as a span inside input widgets and how to reliably target it. You will learn how to enable or disable the clear button and use CSS/JavaScript to hide, style, or reposition the generated icon span to avoid overlap or alignment issues in TextBox, ComboBox, DropDownList, and DatePicker widgets.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/sortable/accessibility/overview
Summary: This article outlines the accessibility behavior of the Kendo UI for jQuery Sortable, covering WCAG 2.2/Section 508 targets, WAI-ARIA semantics, focus management, and screen reader considerations. It clarifies keyboard interaction and known limitations of drag-and-drop, and guides you on structuring markup and configuration to achieve an accessible sorting experience.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/dropdowntree/binding/load-on-demand
Summary: Configure the Kendo UI for jQuery DropDownTree to load child nodes on demand (lazy loading) from a remote endpoint when a node is expanded. Set loadOnDemand: true and bind a HierarchicalDataSource with transport.read, schema.model.id, and schema.model.hasChildren; pass the expanded node’s id to the server so it returns only that node’s children, reducing the initial payload for large hierarchies.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/controls/sortable/accessibility/keyboard-navigation
Summary: This article documents keyboard navigation and accessibility for the Kendo UI for jQuery Sortable, showing how you focus the component, move between items, initiate reordering via keyboard, reposition items, drop, and cancel. It specifies the supported keyboard shortcuts plus the ARIA roles/attributes and focus management used to meet WCAG requirements and support screen readers, so you can implement and test accessible item reordering.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/fixing-bar-visibility-chart-long-labels
Summary: When long category axis labels in a Kendo UI for jQuery Bar/Column Chart consume too much space, the plot area can collapse and bars may appear hidden. Fix this by using categoryAxis.labels.visual to render wrapped or truncated labels within a fixed width and adjusting axis padding/margins, so the chart reserves bounded space for labels. The article includes sample code to measure text and draw multi-line labels, preserving bar visibility and label readability.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/stop-event-propagation-buttons-panelbar-header-contenturl
Summary: Learn how to prevent Kendo UI for jQuery PanelBar headers from expanding/selecting when clicking buttons placed in the header while using contentUrl. The article shows binding delegated handlers and calling e.preventDefault() and e.stopPropagation() on button click (and mousedown/touchstart if needed) so the event doesn’t bubble to the header anchor (.k-link), keeping header controls interactive without triggering PanelBar actions.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/preventing-auto-increment-dragging-kendo-ui-jquery-spreadsheet
Summary: Learn how to prevent auto-increment when dragging the fill handle in the Kendo UI for jQuery Spreadsheet by forcing drag-fill to copy the original value instead of creating a numeric/date series. You’ll intercept the Spreadsheet change event to detect drag-fill and programmatically reset the target range, with an option to hide the fill handle via CSS if you need to disable drag filling entirely.

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05 Nov to 10 Nov 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/customize-star-colors-kendo-ui-jquery-rating
Summary: The Kendo UI jQuery Rating does not expose a color option, so you customize star colors via CSS. Override the widget’s selectors for unselected, selected, and hover states to set your desired colors. The article shows the exact classes to target (e.g., .k-rating-item, .k-selected, .k-hover, .k-icon/.k-svg-icon) with sample rules.

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29 Oct to 05 Nov 2025: highlights of the new online resources that we published last week.

Article: https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/custom-check-all-checkbox-kendo-jquery-dropdowntree
Summary: Learn how to add a custom “Check all” checkbox to a Kendo UI for jQuery DropDownTree and wire it to select or clear all nodes. The article shows rendering the control when the popup opens, accessing the internal TreeView to programmatically toggle the checked state for all items, and syncing the header checkbox (checked/indeterminate) by handling the widget’s check/change events.

Feel free to check them out and share your thoughts!

The Telerik Team

I am trying to implement keyboard only navigation on a web application I am developing to meet accessibility requirements. I am running into problems with the Kendo Grid. 

Here is a dojo: https://dojo.telerik.com/KUcMekCh

I have a grid with 2 locked columns with a button in the first column and a hyperlink in the second column, the other columns just have text. I set navigatable to true. None of my fields are editable.

When the user tabs to the grid, they first get the search bar in my custom grid toolbar. Next they tab to the button (which happens to be a bootstrap dropdown menu but I don't think that is relevant). Here is where the issues start:

1. They then hit tab again and sometimes are taken to the hyberlink while other times they are taken to the next row, skipping column 2's hyperlink. 
2. The grid does not always enter Kendo's navigation mode. When it doesn't, there is no way for the user to interact with the column header which has the sort and tooltip buttons in it.
3. When they get to the bottom of the grid, the locked side will scroll vertically but the unlocked side remains in place, causing the rows to be misaligned.
4. When an input cell is in the unlocked portion of the table, the user has to tab through the entire list before getting back to editing the input for a row. This isn't logical.
5. I worry that if there were editable cells, which some of my grids have, the user won't be able to tab to the next editable cell and instead will be forced to navigate through every cell. I don't want to make it more difficult for a normal user in order to accommodate a keyboard only user so there needs to be a way for both to work well.
6. Often the focus ends up on the unlocked table which attempts to put a blue outline around that, however, the outline isn't fully visible since that is inside of a scrollable div.
7. You can click into a cell with navigatable set to true and then use the navigation but that doesn't work for a keyboard only user.

Hi,

The switch is very tiny!

Best regards,

Laurent.

Hi,

What the hell is that bug with multiselect on last release?

Just type-in text of one list entry, select and admire...

Best regards,

Laurent.

Hi

Can Kendo diagram support drawing from a plain text format - maybe markdown driven - like mermaid.js ?

or do you have any sample code that can adapt?

Thanks

Chris

I have a kendo grid with several columns. The grid has in-cell editing enabled. I need the user to be able to press the tab key and ONLY tab between cells with focusable elements (such as a button) or editable cells. How would I accomplish this? 

Note: the solution here does not work when you have grouped or filtered rows. 

https://www.telerik.com/kendo-jquery-ui/documentation/knowledge-base/skip-non-editable-cells-when-tabbing

Would like to check on how to achieve the following

• Having a custom button/control to allow user to add a placeholder for youtube video with the following requirements, when in editor when show some short of placeholder where user can enter the youtube link. when displaying the content out on a page, the placeholder will become an iframe to show the video
• for image upload, how do i integrate to MS SQL Database such that all uploads will be saved to the DB, user will also be able to select image previously uploaded by other users

I have a grid with a local data source and some editable cells. When a user changes one of the cell's values, it needs to run a few different api calls to get the new values for some of the other cells and then display those. The problem is that when I call .set("fieldName", "value") inside the save command, I get an endless loop. How do I fix this? I have attached a Dojo showing what I mean. If you change the name in the Dojo, the age and DOB should change to something else (I know my example is a little silly given the fields but this is just an example, my real fields are different). Instead, I get an endless loop in the console. 

https://dojo.telerik.com/wmQNdSaZ

Hello Kendo UI team,

We are using Kendo UI for jQuery Spreadsheet and have encountered a border rendering issue that can be reproduced with a very simple setup and no custom configuration.

Reproduction steps

1. Initialize a basic Spreadsheet with default options.

2. Select the range A1:C3.

3. Apply borders to the selected cells (for example, all borders).

4. Select row 3 and delete the row.

Actual result

After deleting row 3:

• The top border of cell B1 disappears.

• Other borders remain unchanged.

• The final border state becomes visually inconsistent and unexpected.

The attached screenshots (step1 → step4) show the full process and the resulting issue.

Expected result

• Borders explicitly applied by the user should remain intact.

• Deleting row 3 should not affect the top border of B1, since that cell is not part of the deleted row.

Request

Is there any solution or workaround for this behavior?

Thank you very much for providing such a powerful and well-designed UI library. We really appreciate the work behind Kendo UI and would love to continue using the Spreadsheet component.

Hello Kendo UI team,

We are using Kendo UI for jQuery Spreadsheet and have encountered a border rendering issue that can be reproduced with a very simple setup and no custom configuration.

Reproduction steps

1. Initialize a basic Spreadsheet with default options.

2. Select the range A1:C3.

3. Apply borders to the selected cells (for example, all borders).

4. Select row 3 and delete the row.

Actual result

After deleting row 3:

• The top border of cell B1 disappears.

• Other borders remain unchanged.

• The final border state becomes visually inconsistent and unexpected.

The attached screenshots (step1 → step4) show the full process and the resulting issue.

Expected result

• Borders explicitly applied by the user should remain intact.

• Deleting row 3 should not affect the top border of B1, since that cell is not part of the deleted row.

Request

Is there any solution or workaround for this behavior?

Thank you very much for providing such a powerful and well-designed UI library. We really appreciate the work behind Kendo UI and would love to continue using the Spreadsheet component.