Question

我似乎完全遵循文档，但我无法弄清楚为什么它不会突出显示导航栏列表项文本作为向下滚动到这些部分。

这是我的身体标签：

<body data-spy="scroll" data-target=".navbar" id="home">

这是我的导航栏：

<!-- nav-->  
<nav class="navbar navbar-expand-lg navbar-light navbar-toggleable-xl 
 bg-primary fixed-top">
  <div class="container">
  <button class="navbar-toggler" type="button" data-toggle="collapse" 
   data-target="#navbarNavAltMarkup" aria-
   controls="navbarNavAltMarkup" aria-expanded="false" aria-
   label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
    <div class="navbar-nav">
      <a class="nav-item nav-link text-white" href="#home">Home</a>
      <a class="nav-item nav-link text-light" href="#about">About</a>
      <a class="nav-item nav-link text-light" 
          href="#speakers">Speakers</a>
      <a class="nav-item nav-link text-light" 
         href="#schedule">Schedule</a>
    </div>
  </div>
   <a class="hidden-xs-down navbar-brand text-white" 
     href="#">Presented by Treehouse</a>
   </div>
</nav>

这是一个身体部分的示例，当我向下滚动到它时不会突出显示：

 <!--about-->
        <div class="row" id="about">
            <div class="col-md-4">
                <h3 class="mb-4">About Full Stack Conf</h3>
                <!--Why won't the image shape change?-->
                <img class="mb-3 img-fluid rounded hidden-xs-down" src="img/pdx.jpg" alt="Portland">
                <p>The beautiful city of Portland, Oregon will be the host city for Full Stack Conf!</p>
                <p>Explore the future of JavaScript with a lineup of industry professionals. Discover new techniques to advance your career as a web developer.</p>
            </div>
            <div class="col-md-4">
                <h3 class="mb-4">Expert Speakers</h3>
                <p>Our expert speaker lineup was just announced, so don't wait too long before grabbing your tickets!</p>
                <p>Want to meet the international JavaScript community and share skills with some of the world's top experts, hackers, and makers? Be the first to know what to expect for the future of JavaScript.</p>
                <p>Full Stack Conf is committed to being inclusive and welcoming for everyone. We look forward to another intensive day of learning and sharing.</p>
            </div>
            <div class="col-md-4">
                <h3 class="mb-4">What You'll Learn</h3>
                <ul>
                    <li><strong>MongoDB</strong>: NoSQL database</li>
                    <li><strong>Angular</strong>: JavaScript framework</li>
                    <li><strong>Express</strong>: Framework for Node</li>
                    <li><strong>Node.js</strong>: JavaScript environment</li>
                    <li><strong>ES2015</strong>: Latest version of JavaScript</li>
                    <li><strong>Babel</strong>: JavaScript compiler</li>
                </ul>
            </div>
        </div>
        <!-- /about -->

Answer 1

它正常工作，但您在链接上的text-*类覆盖了active类的外观。请改用navbar-dark，并确保正文为position:relative ...

https://www.codeply.com/go/MbK0piY1HL

<nav class="navbar navbar-expand-lg navbar-dark navbar-toggleable-xl bg-primary fixed-top">
</nav>

为什么不在Bootstrap 4中使用scrollspy工作？

1 个答案: