jquery - 更改 smoothscroll 上的列表元素类

Question

当我滚动到它时，我试图将列表

元素的类更改为 class="active"。

function onScroll(event){
var scrollPos = $(document).scrollTop();
$('#menu').each(function () {
    var currLink = $(this);
    var refElement = $(currLink.attr("href"));
    if (refElement.position().top <= scrollPos && refElement.position().top + refElement.height() > scrollPos) {
        $('#menu ul li').removeClass("active"); //added to remove active class from all a elements
        currLink.addClass("active");
    }
    else{
        currLink.removeClass("active");
    }
});

这是我的菜单

<div class="navbar navbar-inverse" data-spy="affix" id="header" role="navigation" data-offset-top="100">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Project name</a>
    </div>
    <div class="navbar-collapse collapse" id="menu">
      <ul class="nav navbar-nav navbar-right">
          <li class="active"><a href="#home">Home</a></li>
          <li><a href="#about">About</a></li>
          <li><a href="#">Testimonials</a></li>
          <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
            <ul class="dropdown-menu">
              <li class="dropdown-header">Description Header</li>
              <li><a href="#">Action</a></li>
              <li><a href="#">Another action</a></li>
              <li><a href="#">Something else here</a></li>
              <li class="divider"></li>
              <li><a href="#">More links</a></li>
              <li><a href="#">And one to grow on</a></li>
            </ul>
          </li>
          <li><a href="#">Contact</a></li>
        </ul>
    </div><!--/.navbar-collapse -->
  </div>
</div>  

我不确定我是否正确地修改了列表元素。平滑滚动效果很好，但类不会改变。

谢谢!

Answer 1

试试看，

$("li").click(function(){
 $(".active").removeClass(".actvie");
 $(this).addClass("active");
});