如何在使用CSS或JavaScript拖动img时删除重影图像？

img {
  user-select: none;
}

var img = document.querySelector('img');
var isDragging = false;
var initialX, initialY;

img.addEventListener('mousedown', function(event) {
  isDragging = true;
  initialX = event.clientX - img.offsetLeft;
  initialY = event.clientY - img.offsetTop;
});

document.addEventListener('mousemove', function(event) {
  if (isDragging) {
    var offsetX = event.clientX - initialX;
    var offsetY = event.clientY - initialY;
    img.style.left = offsetX + 'px';
    img.style.top = offsetY + 'px';
  }
});

document.addEventListener('mouseup', function() {
  isDragging = false;
});