如何让我的引导导航栏在滚动时停留在页面顶部？

<div class="navbar-container">
  <!-- 导航栏内容 -->
</div>

.navbar-container {
  position: relative;
  /* 其他样式设置 */
}

.navbar-container.fixed {
  position: fixed;
  top: 0;
  /* 其他样式设置 */
}

window.addEventListener('scroll', function() {
  var navbarContainer = document.querySelector('.navbar-container');
  var distanceFromTop = navbarContainer.offsetTop;

  if (window.pageYOffset > distanceFromTop) {
    navbarContainer.classList.add('fixed');
  } else {
    navbarContainer.classList.remove('fixed');
  }
});