Add Event listener on Button Entity

Hi guys, how add Event listener on click on button Entity (Button Component)?
And how add listener on ComponentSystem script too?

 

Keep searching the forums specifically posts I have made

 

I just used the CustomButton from TinyArms sample proj. (Component and script)

and do it like this

Code (JavaScript):

1. let shareBtn = this.world.getComponentData(this.world.getEntityByName("ShareButton"), game.CustomButton);
2. if (shareBtn.JustDown) {
3.       // do something when clicked
4. }