html - 标头固定顶部不适用于部分引导程序 4

问题描述

我已经header使用top-bar并nav使用了 bootstrap 4。

HTML：

<body data-spy="scroll" data-target=".navbar" data-offset="50">

  <header class="fixed-top">
    <div class="top-bar">
      <div class="container">
        top bar
      </div>
    </div>
    <nav class="navbar navbar-expand-md navbar-dark bg-dark">
      <div class="container">
        <a class="navbar-brand" href="#">Fixed navbar</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarCollapse">
          <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
              <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Link</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled" href="#">Disabled</a>
            </li>
          </ul>
          <form class="form-inline mt-2 mt-md-0">
            <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
            <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </header>
  <section id="intro">
    <div class="container">
      <div class="jumbotron">
        <div class="container">
          <h2>Test</h2>
          <h1>Lorem Ipsum</h1>
          <h4>Lorem Ipsum</h4>
        </div>
      </div>
    </div>
  </section>
</body>

我在上面添加fixed-top类header，Now In actionheader结束了section，section之后不显示header。阻止section后如何显示？！header

演示在这里

标签： htmlcsstwitter-bootstrapbootstrap-4

html - 标头固定顶部不适用于部分引导程序 4

问题描述

解决方案

推荐阅读