在旧版Internet Explorer中重新定位事件期间,检查一个事件是否与另一个事件相同

function isSameEvent(event1, event2) {
  if (event1.type !== event2.type) {
    return false;
  }

  if (event1.clientX !== event2.clientX || event1.clientY !== event2.clientY) {
    return false;
  }

  if (event1.screenX !== event2.screenX || event1.screenY !== event2.screenY) {
    return false;
  }

  if (event1.target !== event2.target) {
    return false;
  }

  if (event1.timeStamp !== event2.timeStamp) {
    return false;
  }

  if (event1.view !== event2.view) {
    return false;
  }

  return true;
}