jointjs – element:pointerdown for rightclick doesnt fire, only left click and middle button click

I’m trying to make an event for rightclicking an element in jointjs, however the event does not fire at all for right click only left click and middle click work. How to make it work for right click? Why doesn’t it work?

this.paper.on('element:pointerdown', (elementView: any, event: MouseEvent) => {
  console.log("1");
  if (event.button === 2) {
    console.log("2");
    event.preventDefault();
    this.startEdgeCreation(elementView.model, event);
  }
});