Error: App.direct is undefined

[VADIM]

I followed CLI tutorial, created two template projects Ext.Net MVC and Ext.Net Razor Pages.
Both apps work fine.
However I cannot modify button in DirectEvent View to pass parameters to DirectEvent controller method.
There is no sample in Examples to pass parameter to controller method.
I tried App.direct but it creates an error "App.direct is undefined".

The code for Ext.Net Razor Pages:

@page  "{handler?}"
@model ExtDemo1.Pages.DirectEventsModel
@{
    ViewData["Title"] = "DirectEvent";
    var X = Html.X();
}
<ext-section target="Main">
    <ext-container region="Center" scrollable="true" paddingAsString="30 20 30 50">
        <content>
            <h1>DirectEvent</h1>
            <ext-button text="Click Direct" onDirectClick="ButtonClick" />
            <ext-button text="Click js alert" onClientClick="alert('client click');" />
            <ext-button text="Click Client" onClientClick="clientClick();" />
            <ext-label id="lbl" text="ext-label"></ext-label>
        </content>
    </ext-container>
</ext-section>

<script>
    function clientClick() {
        //error: App.direct is undefined
        App.direct.ButtonClick('client click');
    };
</script>

Controller:

using System;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Ext.Net;
using Ext.Net.Core;
using MojeeIO;

namespace ExtDemo1.Pages
{
    public class DirectEventsModel : PageModel
    {
        public void OnGet()
        {
        }
        public IActionResult OnPostButtonClick(string message = "default text")
        {
            Label lbl = this.GetCmp<Label>("lbl");
            lbl.Text = message;
            return this.Direct();
        }
    }
}

The recommendation from GitHub (absent: DirectEvent support #1713) worked after some adjustments:

<ext-button text="Click Params">
   <directevents>
      <click pageHandler="ButtonClick" method="POST" type="Load">
         <extraparams>
            <ext-add key="message" value="Button Click Params click" />
         </extraparams>
      </click>
   </directevents>
</ext-button>

But calling controller from JavaScript App.direct still does not work :(
And this solution only works for Razor Pages, not for MVC.