Option to preview custom ThemeBuilder theme through "Open in REPL" functionality for all Kendo/Telerik suites

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Unplanned

Last Updated: 23 Apr 2026 07:01 by Sören

Nick

Created on: 22 Apr 2026 11:52

Type: Feature Request

Option to preview custom ThemeBuilder theme through "Open in REPL" functionality for all Kendo/Telerik suites

ThemeBuilder version Q1 20256 is no longer using KendoReact as a live preview tool and instead uses a static HTML package as a source of truth. The benefit is that the ThemeBuilder now uses the Kendo Theme rendering as the source of truth (compared to older versions, where the source of truth was the KendoReact rendering).

However, the downside of that approach is that there is no longer a live preview for designers to see and feel the changes made to the theme.

Consider adding the option to preview a custom ThemeBuilder theme via the "Open in REPL" functionality across all Kendo/Telerik suites. This would provide a great benefit for users by enabling them to live preview the changes in any supported Kendo / Teleri framework (and not only KendoReact is in the older versions)

1 comment

Sören

Posted on: 23 Apr 2026 07:01

To be honest, a 'ThemeBuilder' without an interactive preview feels more like a CSS editor than a design tool. The shift to a static HTML package might solve technical consistency issues, but it leaves designers 'flying blind.'

Currently, we have to find our own workarounds (like setting up custom Storybooks) just to see how a dropdown or button behaves. Supporting this REPL functionality across all suites is crucial—otherwise, the tool loses its primary value for the people who actually define the visual language of the application.