强制导航栏在滚动时始终保持在页面顶部
<nav class="navbar navbar-expand-sm bg-light @(9)"> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">链接 1</a> </li> <li class="nav-item"> <a class="nav-link" href="#">链接 2</a> </li> </ul> </nav>
<nav class="navbar navbar-expand-sm bg-light fixed-top"> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">链接 1</a> </li> <li class="nav-item"> <a class="nav-link" href="#">链接 2</a> </li> </ul> </nav>