Why did OnStarted invalid Attached NumberAnimation in QML?

[mirro]

 NumberAnimation{
            id: animationRotation
            target: rect
            property: "rotation"
            to: 360
            duration: 3000
            running: false
            easing.type: Easing.OutInQuad
            OnStarted:{

           }
           OnStopped:{
  
           }
}

[SGaist]

Hi,

Casing is important, it's onStarted

[mirro]

@SGaist thank you