Breaking Changes in 15.0.0

Updated on Sep 30, 2026

Chart, Map

The obsolete template syntax with literals and inline expressions is not supported. Instead, set the Chart Template parameter and Map UrlTemplate parameter to the name of a JavaScript function that returns the required content. This change is also related to CSP compliance.

Using Chart templates up to version 14.1.0 and after version 15.0.0

UI for Blazor 14.1.0	UI for Blazor 15.0.0
RAZOR <ChartValueAxisLabels Template="#= value #" />	RAZOR <ChartValueAxisLabels Template="chartLabelTemplate" /> <script> function chartLabelTemplate(context) { return context.value; } </script>

Setting Map URL template up to version 14.1.0 and after version 15.0.0

UI for Blazor 14.1.0	UI for Blazor 15.0.0
RAZOR <MapLayer UrlTemplate="https://#= subdomain #.tile.openstreetmap.org/#= zoom #/#= x #/#= y #.png" />	RAZOR <MapLayer UrlTemplate="tileUrlFunction" /> <script> function tileUrlFunction(context) { return `https://${context.subdomain}.tile.openstreetmap.org/${context.zoom}/${context.x}/${context.y}.png`; } </script>

MultiSelect

The default value of the MaxAllowedTags parameter is changed from null to 10.

Scheduler

The SchedulerPopupEditFormSettings parameters Columns, ColumnSpacing, and Orientation are removed.

See Also

• Rendering changes in Telerik UI for Blazor 15.0.0