While routing to /main url, button onmousedown event not working under "Write zero JavaScript" panel

[aspnetlearner]

kernel.js file is not mapped with /main

app.MapGet("/main", async context =>
{
    var pipeWriter = context.Response.BodyWriter;

    pipeWriter.Write($"{ui.Wat(vm)}");

    await pipeWriter.FlushAsync();
});

The Increment method not incrementing Count value in Button Text

void Increment(Event e)
{
    ViewModel.Count++;
}