Question

我是HTML和JavaScript的新手，现在我遇到了一个问题，我认为你们很多人一直在与自己打交道。

我有一个导航栏，默认情况下，当我点击不同的页面参考时，它不会更改活动状态。

＆＃39; Home＆＃39; nav-item默认是活动的，我想在单击其他导航项时更改活动状态。但我不知道该怎么办？据我所知，这并不是太多代码，但我很乐意在这里得到一些帮助。

这是我的代码：

<head>
    <meta charset="UTF-8">
    <title>MaU Movie database</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://bootswatch.com/4/cyborg/bootstrap.min.css">
    <link rel="stylesheet" href="style.css">
    <link rel="icon" href="mumdblogo.png">
</head>

<body>
    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
        <a class="navbar-brand" href="index.html" id="movielogo"><img src="moviefylogo.png"></a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarColor02" aria-controls="navbarColor02"
            aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarColor02">
            <ul class="navbar-nav mr-auto">
                <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="library.html">Library</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="uploads.html">Uploads</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="about.html">About</a>
                </li>
            </ul>
        </div>
    </nav>

    <div class="container">
        <div class="jumbotron">
            <h3 class="text-center">Search Movie!</h3>
            <form id="searchForm">
                <input type="text" class="form-control" id="searchText" placeholder="Search for any movie...">
            </form>
        </div>
    </div>

    <div class="container">
        <div id="movies" class="row">
    </div>

    <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>
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
    <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
    <script src="main.js"></script>

</body>
</html>

Answer 1

您可以在代码的末尾执行此操作。在<script src="main.js"></script>

之下

<script>
$(document).ready(function() {
    $( ".mr-auto .nav-item" ).bind( "click", function(event) {
        event.preventDefault();
        var clickedItem = $( this );
        $( ".mr-auto .nav-item" ).each( function() {
            $( this ).removeClass( "active" );
        });
        clickedItem.addClass( "active" );
    });
});
</script>

而不是通过链接（event.preventDefault()）跟随他们，例如。 about.html或uploads.html此snipet代码更改了单击项目的活动类。

编辑1：

对于静态页面（或由例如php提供），你不需要任何aditional js代码，但是你应该调整导航到下面的例子（看看活动＆＃39;类是什么，sr-only span current是可选的，但很好地放在例子中。

index.html（您的基本代码）

<ul class="navbar-nav mr-auto">
    <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="library.html">Library</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="uploads.html">Uploads</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="about.html">About</a>
    </li>
</ul>

<强> library.html

<ul class="navbar-nav mr-auto">
    <li class="nav-item">
        <a class="nav-link" href="index.html">Home</a>
    </li>
    <li class="nav-item active">
        <a class="nav-link" href="library.html">Library<span class="sr-only">(current)</span></a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="uploads.html">Uploads</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="about.html">About</a>
    </li>
</ul>

<强> uploads.html

<ul class="navbar-nav mr-auto">
    <li class="nav-item">
        <a class="nav-link" href="index.html">Home</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="library.html">Library</a>
    </li>
    <li class="nav-item active">
        <a class="nav-link" href="uploads.html">Uploads<span class="sr-only">(current)</span></a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="about.html">About</a>
    </li>
</ul>

<强> about.html

<ul class="navbar-nav mr-auto">
    <li class="nav-item">
        <a class="nav-link" href="index.html">Home</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="library.html">Library</a>
    </li>
    <li class="nav-item">
        <a class="nav-link" href="uploads.html">Uploads</a>
    </li>
    <li class="nav-item active">
        <a class="nav-link" href="about.html">About<span class="sr-only">(current)</span></a>
    </li>
</ul>

Answer 2

我认为最简单的解决方案是检查窗口pathname对象中的location并相应地更改nabber状态。

这样的事情会起作用：

var pathname = window.location.pathname,
pages = ['home', 'library', 'uploads','about'];

$('.nav-item').each(function(i) {
 if (pathname.includes(pages[i])) this.addClass('active');
 else if (this.className.includes('active')) this.removeClass('active');
});

如何使Bootstrap导航栏更改活动状态？

2 个答案: