one(...)

one(evt : string, func : (...params : any[]) => void) : this;

Attaches a single-use handler function to an event. The handler will only be called the first time the event is triggered.

Parameters

Parameter	Type	Description
evt	string	The name of the event to attach to.
func	function	The function to be called when the event is triggered.

this

myobject.one("pointerdown", myHandler);

function myHandler() {
    // This function is called the first time the user taps on myobject
}