AddEventListener
addEventListener() is a common BrightSign method that is used to listen for an event.
Syntax:
target.addEventListener(type, listener);
typestring : Specifies the type of event to listen forlistenerfunction: The object to be notified when the event (of the specifiedtype) happens
RemoveEventListener
removeEventListener()is a common BrightSign method that is used to remove an event listener.
Syntax:
target.removeEventListener(type, listener);
typestring : Specifies the type of event to listen forlistenerfunction: The object to be notified when the event (of the specifiedtype) happens
Example
function GPIOcontrolDown(msg){
console.log(JSON.stringify(msg));
console.log(" GPIO : " + msg.detail)
}
// to add an event listener for the "controldown" GPIO event
control_port.addEventListener("controldown", GPIOcontrolDown);
// to remove the "controldown" GPIO event listener
control_port.removeEventListener("controldown", GPIOcontrolDown);