I really like UI.Next, looking forward to learning everything about it! But right now, I'm stuck: I have started playing around in the sample solution. Now, in the SimpleTextbox example, I tried to equip the label with a view of the variable that goes through View.Map such that I can manipulate the string before displaying.

Now, if I want to use server-side logic for that (say, append System.DateTime.Now.ToString()), I thought I could use an RPC function.

1
2

[<Rpc>]
let AppendTime (txt:string) = System.String.Format("{0} - {1}", txt, System.DateTime.Now)

So I have

1
2
3
4
5

 let rvText = Var.Create ""
 
 let inputField = Doc.Input [Attr.Create "class" "form-control"] rvText
 
 let label = Doc.TextView <| View.Map AppendTime rvText.View

where I render the label within a Div0. As long as the AppendTime function is a client function tagged as [<JavaScript>], everything is fine, but if I change it to [<Rpc>] in order to use server-side functionality, it does not work (the page for this sample does not even load completely, I don't see the textbox anymore).

Am I doing something fundamentally wrong? I also tried out MapAsync, but to no avail.

Thanks in advance!