The queue.list property (array) holds queued actions to be sent to the server side. It applies only to ASP.NET WebForms, ASP.NET MVC, and Java editions.
DayPilotDayPilot.Calendar.queue.list[]This property is part of the Calendar notify event model and exposes the current client-side queue of actions waiting to be submitted to the server.
On the server side, the queued actions are available in the notify event handler as e.Queue, where they can be processed one by one.
Notify Event Model [doc.daypilot.org]
Notify Event Handler [doc.daypilot.org]