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dynamically add treeview nodes in jQuery MVC 5

Hello everyone, I am going to share the code sample for how to dynamically add treeview nodes using jQuery.

The code sample as given below.
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(function() {
  
    $(".collapsible").live("click", function (e) {
        e.preventDefault();
  
        //This is get curent clicked items.
        var self = $(this);
         
        //Check current data already loaded or not?
        var isLoaded = $(self).attr('dataLoaded');
         
         // If return true, data is already loaded then write below code.
         // If return false, data not loaded then write below code.
        if (isLoaded) {
            $(self).toggleClass("collapse expand");
            $(self).closest('li').children('ul').slideToggle();
        }
        else {          
            $(self).addClass("loadingParent");
            $(self).removeClass("collapse");
  
            // Now Load Data Here
            $.ajax({
                url: "API/treeview/GetTreeSubMenu",
                type: "GET",
                data: { ParentId : $(this).attr('ParentId')},
                success: function (data) {
                    $(self).removeClass("loadingParent");
  
                    if ( data !== undefined && data.length > 0) {
                        var $ul = $("<ul></ul>");
                         
                        $.each(data, function (key, val) {
                            //append each chield node.
                            $ul.append($("<li></li>").
                                       append("<span class='collapse collapsible' dataLoaded='false' pid='"+
                                             val.ChieldMenu_Id+"'></span>" + "<span><a href='"+
                                             val.ChieldMenu_URL+"'>"+
                                             val.ChieldMenu_Name+"</a></span>"));
                        });
  
                        $(self).parent().append($ul);
                        $(self).addClass('collapse');
                        $(self).toggleClass('collapse expand');
                        $(self).closest('li').children('ul').slideDown();
                    }
                    else {
                        //That meanse here is no SubMenu.
                        $(self).css({'dispaly':'inline-block'});
                    }
  
                    //This is show the data is loded.
                    $(self).attr('dataLoaded', true);
                },
                error: function () {
                    console.log("Error on api call!!");
                }
            });
        }
  
    });
});
(function() {
 
    $(".collapsible").live("click", function (e) {
        e.preventDefault();
 
        //This is get curent clicked items.
        var self = $(this);
        
        //Check current data already loaded or not?
        var isLoaded = $(self).attr('dataLoaded'); 
        
         // If return true, data is already loaded then write below code.
         // If return false, data not loaded then write below code.
        if (isLoaded) {
            $(self).toggleClass("collapse expand");
            $(self).closest('li').children('ul').slideToggle();
        }
        else {           
            $(self).addClass("loadingParent"); 
            $(self).removeClass("collapse");
 
            // Now Load Data Here
            $.ajax({
                url: "API/treeview/GetTreeSubMenu",
                type: "GET",
                data: { ParentId : $(this).attr('ParentId')},
                success: function (data) {
                    $(self).removeClass("loadingParent");
 
                    if ( data !== undefined && data.length > 0) { 
                        var $ul = $("<ul></ul>");
                        
                        $.each(data, function (key, val) {
                            //append each chield node.
                            $ul.append($("<li></li>").
                                       append("<span class='collapse collapsible' dataLoaded='false' pid='"+ 
                                             val.ChieldMenu_Id+"'></span>" + "<span><a href='"+
                                             val.ChieldMenu_URL+"'>"+
                                             val.ChieldMenu_Name+"</a></span>"));
                        });
 
                        $(self).parent().append($ul);
                        $(self).addClass('collapse');
                        $(self).toggleClass('collapse expand');
                        $(self).closest('li').children('ul').slideDown();
                    }
                    else {
                        //That meanse here is no SubMenu.
                        $(self).css({'dispaly':'inline-block'});
                    }
 
                    //This is show the data is loded.
                    $(self).attr('dataLoaded', true);
                },
                error: function () {
                    console.log("Error on api call!!");
                }
            });
        }
 
    });
});

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