当我向右滚动时，如何防止元素移动？

.element {
  position: fixed;
  top: 50px;
  left: 50px;
}

window.addEventListener('scroll', function() {
  var element = document.getElementById('elementId');
  var scrollLeft = window.pageXOffset || document.documentElement.scrollLeft;
  element.style.left = scrollLeft + 'px';
});

.container {
  overflow: hidden;
}