Documentation states that Grid supports Virtualization with Grouping if it is done by loading the Groups on-demand.
See:
On page: Blazor Grid - Load Group Data On Demand | Telerik UI for Blazor
From this, it appears that Virtual Scrolling, Group Load on Demand, and pagination of the results should function as expected. I'm specifically focusing on the section where it says "load on demand for the data when the user expands a group or when they scroll to need a new set of available groups".
The behavior I am seeing in my Telerik Repl is not matching up with that.
See: https://blazorrepl.telerik.com/QFbmurvT41eZq6Ld34
In the repl, I have added some Console.WriteLines to see when OnRead is actually called, as well as to log out some other information about the OnRead Request. It can be seen that no pagination information is included in the request (PageSize = 0, Skip = 0) while the PageSize is set on the actual Grid component (PageSize = 20).
As a result, all groups are loaded initially, which will be problematic if my server-side data set is being grouped on a value that will result in thousands/millions of groups.
It is possible that I missed something in the documentation that would enable the expected behavior (the Grid actually giving me PageSize and Skip so pagination will actually work), but it is also equally possible that this was never intended behavior, and I have been misled by the documentation page.
