我无法在浏览器上使用引导程序切换按钮,有人可以帮助我识别ps。我已经在我的head标签中添加了bootstrap CDN,并在正文中添加了jquery和javascript。
<nav class="navbar navbar-dark bg-dark navbar-expand-md">
<a href="#" class="navbar-brand">NAVBAR</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-
target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="#navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item">
<a href="#" class="nav-link">HOME</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">ABOUT</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">TICKETS</a>
</li>
</ul>
</div>
</nav>
id
属性不应以#
开头。它应该只是:id="navbarSupportedContent"
<nav class="navbar navbar-dark bg-dark navbar-expand-md">
<a href="#" class="navbar-brand">NAVBAR</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item">
<a href="#" class="nav-link">HOME</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">ABOUT</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">TICKETS</a>
</li>
</ul>
</div>
</nav>
下拉列表基于第三方库Popper.js构建,该库提供动态定位和视口检测。确保在Bootstrap的JavaScript之前包含popper.min.js或使用包含Popper.js的bootstrap.bundle.min.js / bootstrap.bundle.js。
这是在Bootstrap文档中编写的)))