Question

我似乎无法获得基本的Bootstrap下拉菜单。

我没有覆盖任何CSS。我确实包含了一个小JS用于平滑滚动链接，可能会搞乱它？

CSS

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">

HTML

<!-- Test dropdown -->
<div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
    Dropdown
    <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li role="separator" class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>
<!-- End test dropdown -->

JS

     $(document).ready(function(){
    $("a").on('click', function(event) {
      if (this.hash !== "") {
        event.preventDefault();
        var hash = this.hash;
        $('html, body').animate({
          scrollTop: $(hash).offset().top
        }, 800, function(){
          window.location.hash = hash;
        });
      }
    });
  });

Answer 1

Bootstrap下拉列表也需要JavaScript才能工作。没有JS =没有下拉。

在这里（点击下面的“运行代码段”查看它是否有效）：

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<!-- Test dropdown -->
<div class="dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
        Dropdown
        <span class="caret"></span>
    </button>
    <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li role="separator" class="divider"></li>
        <li><a href="#">Separated link</a></li>
    </ul>
</div>
<!-- End test dropdown -->

<script>
    $(document).ready(function(){
        $("a").on('click', function(event) {
            if (this.hash !== "") {
                event.preventDefault();
                var hash = this.hash;
                $('html, body').animate({
                    scrollTop: $(hash).offset().top
                }, 800, function(){
                    window.location.hash = hash;
                });
            }
        });
    });
</script>

基本Bootstrap下拉菜单 - 无法使其工作？

1 个答案: