如何使用touchstart和touchend事件跟踪移动设备上跨域iframe的点击

document.addEventListener('touchstart', function(event) {
  var touch = event.touches[0];
  var x = touch.clientX;
  var y = touch.clientY;
  // 进行相应的处理
});

document.addEventListener('touchend', function(event) {
  var touch = event.changedTouches[0];
  var x = touch.clientX;
  var y = touch.clientY;
  // 进行相应的处理
});

var threshold = 10; // 点击事件的阈值，可以根据实际情况进行调整

document.addEventListener('touchstart', function(event) {
  var touch = event.touches[0];
  var startX = touch.clientX;
  var startY = touch.clientY;

  document.addEventListener('touchend', function(event) {
    var touch = event.changedTouches[0];
    var endX = touch.clientX;
    var endY = touch.clientY;

    var distance = Math.sqrt(Math.pow(endX - startX, 2) + Math.pow(endY - startY, 2));

    if (distance < threshold) {
      // 是点击事件，进行相应的处理
    }
  });
});