The resourceBubble property (DayPilot.Bubble class) specifies a bubble object that will be used to show resource details on hover.
nullScheduler config:
{
  resourceBubble: new DayPilot.Bubble(),
  // ...
}DayPilot Bubble (DayPilot Pro for ASP.NET WebForms)
Using Bubbles with Scheduler (DayPilot Pro for ASP.NET WebForms)
Event calendar/scheduling AJAX components. Available for JavaScript/HTML5/jQuery, ASP.NET, ASP.NET MVC. Build resource booking, project management, time tracking applications, personal and shared event calendars.
DayPilot