firePointerEvent.js

function firePointerEvent(el, eventName, x,y){
    const ev = new MouseEvent(eventName, {
        clientX: x, clientY: y, bubbles: true, cancelable: true
    });
    
    el.dispatchEvent(ev);
}

var relativePosition = APP.getNodePositionAsOffset("cards.ticket1.emptyTicket.buttonAdd")
var canvas = document.getElementsByTagName("canvas")[0];
var rect = canvas.getBoundingClientRect();

firePointerEvent(canvas, "pointerdown", rect.x + relativePosition.x, rect.y + relativePosition.y);
firePointerEvent(canvas, "pointerup", rect.x + relativePosition.x, rect.y + relativePosition.y);

relativePosition = APP.getNodePositionAsOffset("cards.ticket2.emptyTicket.buttonAdd")
firePointerEvent(canvas, "click", rect.x + relativePosition.x, rect.y + relativePosition.y);