How to get touch coordinates in hammerjs?

问题

Can anybody tell me how to get touch coordinates in hammerjs? Following code is giving error:

hammerEvent.on('pan', (ev) => {
  console.log('x, y: ', ev.clientX, ev.clientY);
}

来源：https://stackoverflow.com/questions/64771838/how-to-get-touch-coordinates-in-hammerjs