如何让快速滚动条在回收器视图中永久可见？

.recycler-view {
  overflow-y: scroll;
}

var recyclerView = document.getElementById('recycler-view');
recyclerView.addEventListener('scroll', function() {
  var scrollTop = recyclerView.scrollTop;
  var scrollHeight = recyclerView.scrollHeight;
  var clientHeight = recyclerView.clientHeight;
  
  if (scrollTop + clientHeight >= scrollHeight - 10) {
    recyclerView.style.overflowY = 'scroll';
  } else {
    recyclerView.style.overflowY = 'auto';
  }
});