Question

我是引导程序的新手，并且正在尝试导航栏崩溃。我能够正确折叠它，但是单击它时它没有膨胀。

我尝试了所有可以找到的解决方案：

确保Jquery在Bootstrap之前
对Jquery使用了不同的CDN链接
包含的popper.js CDN

下面是我的代码

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
        <link rel="stylesheet" href="css/bootstrap.min.css">
        <link rel="stylesheet" href="css/custom.css">
        <script src="js/bootstrap.min.js"></script>
    </head>
    <body>
    
        <nav class="navbar navbar-expand-lg navbar-light bg-light">
            
            <button class="navbar-toggler" data-toggle="collapse" data-target="navbarNav">
                <span class="navbar-toggler-icon"></span>
            </button>
            
            <a class="navbar-brand" href="#">
                <img id="logo" src="img/logo.png" width="100%" height="100%" alt="">
            </a>
    
            <div class="collapse navbar-collapse" id="navbarNav">
                <ul class="navbar-nav">
                    <li class="nav-item active">
                    <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item">
                    <a class="nav-link" href="about_us.html">About Us</a>
                    </li>
                    <li class="nav-item">
                    <a class="nav-link" href="products.html">Products</a>
                    </li>
                    <li class="nav-item">
                    <a class="nav-link" href="contact_us.html">Contact Us</a>
                    </li>
                </ul>
            </div>
        </nav>

请帮忙，因为我已经被卡住了一段时间，但仍然无法正常工作。

提前谢谢！

Answer 1

您在#中错过了data-target="#navbarNav"，请使用此

<script src="http://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link href="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>



    <nav class="navbar navbar-expand-lg navbar-light bg-light">

        <button class="navbar-toggler" data-toggle="collapse" data-target="#navbarNav">
            <span class="navbar-toggler-icon"></span>
        </button>

        <a class="navbar-brand" href="#">
            <img id="logo" src="img/logo.png" width="100%" height="100%" alt="">
        </a>

        <div class="collapse navbar-collapse" id="navbarNav">
            <ul class="navbar-nav">
                <li class="nav-item active">
                <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item">
                <a class="nav-link" href="about_us.html">About Us</a>
                </li>
                <li class="nav-item">
                <a class="nav-link" href="products.html">Products</a>
                </li>
                <li class="nav-item">
                <a class="nav-link" href="contact_us.html">Contact Us</a>
                </li>
            </ul>
        </div>
    </nav>

Bootstrap 4导航栏折叠正确但无法扩展

1 个答案: