[Solved] Changes in unbind function in 2026 version?

[Claire]

Hi, 

I have a diagram developed in Kendo UI 2024.3.806, for which I disconnected the mouse scrolling functionality using the following lines:

$("#diagram").unbind("mousewheel");
$("#diagram").unbind("DOMMouseScroll");

so that user can use it to scroll the page instead of zooming in the diagram.

When migrating it to the 2026 version, these lines do not work anymore.
How can I replace them?

I made 2 examples in Kendo Dojo UI:
2024 version: https://dojo.telerik.com/sbTBquyi
2026 version: https://dojo.telerik.com/SjlrhOEW/2

Many thanks in advance for your help!

Kind regards,
Claire

 

[Rose]

It is possible that the Diagram widget now uses modern wheel event handling internally, so unbinding the legacy `mousewheel` and `DOMMouseScroll` events no longer affects the zoom behavior. You could try intercepting the standard `wheel` event instead, for example: javascript $("#diagram").on("wheel", function(e) { e.stopPropagation(); }); Another option would be to check whether the 2026 Diagram API exposes a dedicated zoom or mousewheel configuration, as Telerik may have changed the implementation between releases. I'm curious whether the Telerik team can confirm if wheel-based zooming was refactored in the 2026 version and whether there is now an officially supported way to disable it while preserving page scrolling. Subway Surfers

[Patrick | Technical Support Engineer, Senior]

Hello Claire,

Thank you for reaching out about the Kendo UI Diagram.  I can confirm the mousewheel event has been deprecated.  As a replacement to disable the zooming feature for the Kendo UI Diagram, utilize preventDefault during the zoomStart event:

JavaScript

            $("#diagram").kendoDiagram({
              	zoomStart: function(e){
                  //disable zooming
                  e.preventDefault();
                },
                //....
            });   

Please feel free to take a look at this updated Progress Kendo UI Dojo with the approach above, and let me know if you have any questions.

Regards,
Patrick | Technical Support Engineer, Senior
Progress Telerik

[Claire]

Thanks Patrick, it works like a charm!