var treeview;

    function FindTreeViewObj(objName) {
        treeview = $(objName).data("kendoTreeView");
    }

FindTreeViewObj("#treeview");

    function GetSelectedNode() {
        return treeview.select();
    }

GetSelectedNode();

    function DisableSelectedNode() {
        treeview.enable(GetSelectedNode(), false);
    }

DisableSelectedNode();

    function EnableSelectedNode() {
        treeview.enable(GetSelectedNode(), true);
    }

EnableSelectedNode();

    function EnableAllNodes() {
        treeview.enable(".k-item");
    }

EnableAllNodes();

    function ExpandAllNodes() {
        treeview.expand(".k-item");
    }

ExpandAllNodes();

    function CollapseAllNodes() {
        treeview.collapse(".k-item");
    }

CollapseAllNodes();

    function RemoveSelectedNode() {
        treeview.remove(GetSelectedNode());
    }

RemoveSelectedNode()

    function FilterTreeView(filterText) {
        if (filterText !== "") {
            treeview.dataSource.filter({
                field: "text",
                operator: "contains",
                value: filterText
            });
        } else {
            treeview.dataSource.filter({});
        }
    }

FilterTreeView('my node')

    function SortTreeView(sortType) {
        treeview.dataSource.sort({
            field: "text",
            dir: sortType
        });
    }

SortTreeView('asc');
SortTreeView('desc');

    function GetSelectedDataItem() {
        return treeview.dataItem(GetSelectedNode());
    }

GetSelectedDataItem();

    function GetSelectedNodeId() {
        var data = GetSelectedDataItem();
        return data.id;
    }

GetSelectedNodeId();

    function GetSelectedNodeText() {
        var data = GetSelectedDataItem();
        return data.Name;
    }

GetSelectedNodeText();

    function SetSelectedNodeText(value) {
        var node = GetSelectedNode();
        treeview.text(node, value);
    }

SetSelectedNodeText('new value');

    function GetNodeByText(text) {
        return treeview.findByText(text);
    }

GetNodeByText('mynode');

    function GetNodeByText(id) {
        return treeview.findByUid(id);
    }

GetNodeByText(4);

    function InsertAfter(item, nextItem) {
        treeview.insertAfter({ text: "item" }, GetNodeByText(nextItem));
    }

InsertAfter('new item', 'old item')

    function MoveToAfter(firstItem, secondItem) {
        treeview.insertAfter(GetNodeByText(firstItem), GetNodeByText(secondItem));
    }

MoveToAfter('firstItem', 'secondItem');

    function InsertBefore(item, nextItem) {
        treeview.insertBefore({ text: "item" }, GetNodeByText(nextItem));
    }

    function MoveToBefore(firstItem, secondItem) {
        treeview.insertBefore(GetNodeByText(firstItem), GetNodeByText(secondItem));
    }

InsertBefore('new item', 'old item');
MoveToBefore('firstItem', 'secondItem');

    function GetParent(node) {
        return treeview.parent(node);
    }

GetParent(GetSelectedNode());

    function Toggle(node) {
        treeview.toggle(node);
    }

Toggle(GetSelectedNode());

    function NewNode(nodeText, nodeValue, selectedNode) {
        treeview.append({
            Name: nodeText,
            Id: nodeValue
        }, selectedNode);
    }

NewNode('new node', 1, null);
NewNode('new sub node', 2, GetSelectedNode());

using System;
using System.Xml;
using System.Xml.Serialization;

namespace Test
{
  /// <summary>
  /// کلاسی جهت نمایش تعداد خواننده فید وبلاگ شما
  /// <example>CFeedBurner data = new CFeedBurner { FeedID = "fhphjt61bueu08k93ehujpu234" };
  /// MessageBox.Show(data.Circulation().ToString());</example>
  /// </summary>
  class CFeedBurner
  {
      /// <summary>
      /// آی دی فید شما زمانیکه به فید برنر لاگین کرده‌اید در تایتل صفحه مربوطه
      /// </summary>
      public string FeedID { get; set; }

      /// <summary>
      /// نگاشت فید به یک کلاس
      /// </summary>
      /// <returns>کلاس متناظر با فید</returns>
      /// <exception cref="Exception">لطفا شماره شناسایی فید را وارد کنید</exception>
      rsp deserializeFromXML()
      {
          if (FeedID == null)
              throw new Exception("لطفا شماره شناسایی فید را وارد کنید");

          XmlSerializer deserializer =
              new XmlSerializer(typeof(rsp));
          using (XmlReader reader = XmlReader.Create(
              string.Format("https://feedburner.google.com/api/awareness/1.0/GetFeedData?id={0}", FeedID)))
          {
              return (rsp)deserializer.Deserialize(reader);
          }
      }

      /// <summary>
      /// دریافت تعداد خواننده فید
      /// </summary>
      /// <returns>آمار فید</returns>
      /// <exception cref="Exception">اطلاعات فید شما قابل دریافت نیست</exception>
      public int Circulation()
      {
          rsp data = deserializeFromXML();
          if (data == null || data.feed == null || data.feed.Length == 0)
              throw new Exception("اطلاعات فید شما قابل دریافت نیست");

          if (data.feed[0].entry == null || data.feed[0].entry.Length == 0)
              throw new Exception("اطلاعات فید شما قابل پردازش نیست");

          return int.Parse(data.feed[0].entry[0].circulation);
      }
  }
}

xsd.exe GetFeedData.xml
xsd.exe GetFeedData.xsd /c

IF (currentYear<2023){
alert('Wear a mask!');
}

var showCoronaAlert=_cofiguration.GetValue<bool>("Features:showCoronaAlert"); // or read this from Database
If(showCoronaAlert){
alert(Wear a amask!);
}

Install-Package Microsoft.FeatureManagement

using Microsoft.FeatureManagement;
public void ConfigureServices(IServiceCollection services)
{
    services.AddFeatureManagement();
}

"FeatureManagement": {
   
}

 public class HomeController : Controller
    {
        private readonly IFeatureManager _featureManager;

        public HomeController(IFeatureManager featureManager)
        {
            _featureManager = featureManager;
        }
        public async Task<IActionResult> Index()
        {
            if(await _featureManager.IsEnabledAsync("MaskAlert"))
            {
                // show messeage
            }

            return View();
        }
    }

 "FeatureManagement": {
    "EmergencyBanner": {
      "EnabledFor": [
        {
          "Name": "Microsoft.TimeWindow",
          "Parameters": {
            "Start": "01 Mar 2021 12:00:00 +00:00",
            "End": "01 Apr 2021 12:00:00 +00:00"
          }
        }
      ]
    }
  }

if(await _featureManager.IsEnabledAsync("EmergencyBanner")){
// show Emergency banner 
}

"FeatureManagement": {
    "EmergencyBanner": {
      "EnabledFor": [
        {
          "Name": "Microsoft.TimeWindow",
          "Parameters": {
            "End": "01 Apr 2021 12:00:00 +00:00"
          }
        }
      ]
    }
  }

"FeatureManagement": {
    "ChatV2": {
      "EnabledFor": [
        {
          "Name": "BrowserFilter",
          "Parameters": {
            "AllowedBrowsers": [ "Chrome" ]
          }
        }
      ]
    }
  }

  public class BrowserFilterSettings
    {
        public string[] AllowedBrowsers { get; set; }
    }

public void ConfigureServices(IServiceCollection services)
        {
            services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddFeatureManagement()
                .AddFeatureFilter<BrowserFilter>();
        }

if(await _featureManager.IsEnabledAsync("ChatV2")){
// do something 
}

function reserveProduct(){
  console.log("Function : reserveProduct"); 
  return true;
}

function getCredits(){
  console.log("Function : getCredits"); 
  var credits = "100";
  return credits;
}

var result = purchaseProduct();

<script src="products.js"></script>
<script src="purchase.js"></script>
<script src="main.js"></script>
<script src="credits.js"></script>

PM> Install-Package RequireJS

define(["credits","products"], function(credits,products) { 
  console.log("Function : purchaseProduct"); 
  return {
    purchaseProduct: function() { 
      var credit = credits.getCredits();
      if(credit > 0){
        products.reserveProduct();
        return true;
      }
      return false;
    }
  }
});

define(function(products) {
  return {
    reserveProduct: function() {
      console.log("Function : reserveProduct"); 
      return true;
    }
  }
});

define(function() {
  console.log("Function : getCredits"); 
  return {
    getCredits: function() {
      var credits = "100";
      return credits;
    }
  }
});

require(['purchase'], function( purchase ) {
    var result = purchase.purchaseProduct(); 
});