The clientState property (object) stores custom data that will be serialized and sent to the server with every CallBack request.
Only applicable to ASP.NET WebForms, ASP.NET MVC, and Java versions.
DayPilot.Month.clientState{}On the server side, the serialized data is available as the ClientState property.
JavaScript
const month = new DayPilot.Month("dp", {
// ...
});
month.init();
month.clientState.filter = 'my filter';ClientState [doc.daypilot.org]