SharePoint 2013 client-side base list read code

SP2013JSListCode.js

//We need to run our function only after sp.js file loads
 ExecuteOrDelayUntilScriptLoaded(ViewItem, "sp.js");
 function ViewItem()
     {
         var context = new SP.ClientContext.get_current();
         var web = context.get_web();
         var list = web.get_lists().getByTitle('<<List Name>>');

        //It will fetch all the items from the list
         var myquery = new SP.CamlQuery.createAllItemsQuery();
         myItems = list.getItems(myquery);
         context.load(myItems);

        //If the items load correctly then success function will be called
         context.executeQueryAsync(Function.createDelegate(this, this.success), Function.createDelegate(this, this.failed));
     }


     function success() 
     {
         var text="";
         var LinkURL= "";
         var TextURL="";
         var cssClass="";
         var ListEnumerator = this.myItems.getEnumerator();
          text='<ul>';
         while(ListEnumerator.moveNext())
         {
             //Will get the current row from the SP List
             var currentItem = ListEnumerator.get_current();

             //Will get the "Url" column from the current row
             LinkURL = currentItem.get_item('Url') ;

             TextURL= currentItem.get_item('Title');
             cssClass= currentItem.get_item('CssClass');

            //String is formed with links pointing to URLs with css applied
             text=text+'<li class="'+cssClass+'">';
             text=text+('<a href="' + LinkURL+ '">'+TextURL+'</a></li>');
             }
             text=text+'</ul>';

          //Getting the empty div tag
          fieldNameElement=document.getElementById('LeftNavForMySite');

         //Assign the string formed to the div element's innerHTMl to display on page
          fieldNameElement.innerHTML=text;
     }

     function failed(sender, args) 
     {
         alert("failed. Message:" + args.get_message());
     }