根據當前頁面的元數據設置鏈接的“活動”類和href屬性
[英]Setting an “active” class and href attribute for link based on the current page's metadata
問題描述
我有三個頁面，每個頁面都包含帶有三個鏈接的導航欄，
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="/home">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/about">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/contact">Contact</a>
</li>
</ul>
每個頁面都有一個<meta name="application-name" content="[PAGENAME]"> 。 在導航欄中，我希望與頁面<meta name="application-name" content="[PAGENAME]">的鏈接自動將其鏈接之一更改為href="#"並添加active類。
碼：
<head> <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" /> <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script> <meta name="application-name" content="Home"> </head> <nav class="navbar navbar-expand-lg navbar-light bg-light fixed-top"> <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 mr-auto"> <li class="nav-item"> <a class="nav-link" href="/home">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="/about">About</a> </li> <li class="nav-item"> <a class="nav-link" href="/contact">Contact</a> </li> </ul> </div> </nav>
關於如何使此功能起作用的任何建議？
2 個解決方案
解決方案1
0 已采納 2019-08-28 16:15:23
這是我想出的。 我首先引用了meta標簽並獲取了其信息，然后遍歷了您的鏈接，並在必要時添加了類。 還要注意，我向您的鏈接添加了data-page屬性，以使數據更好地匹配。 我考慮過切片href，但意識到以后可能會插入問題。 如果meta標記將始終與錨點中的標記匹配，則還可以將頁面標題與links[i].innerHTML進行比較，效果也一樣。
let metas = document.getElementsByTagName('meta'); // Find the tag and get its content let pageTitle; for(let i = 0; i < metas.length; i++) { if(metas[i].getAttribute("name") === "application-name") { pageTitle = metas[i].getAttribute("content"); } } // Find the nav a and give it the link let container = document.getElementById("navbarSupportedContent"); let links = container.getElementsByClassName("nav-link"); for(let i = 0; i < links.length; i++) { if(links[i].getAttribute("data-page").toLowerCase() === pageTitle.toLowerCase()) { links[i].className += " active"; links[i].href = "#"; } }
<head> <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" /> <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script> <meta name="application-name" content="Home"> </head> <nav class="navbar navbar-expand-lg navbar-light bg-light fixed-top"> <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 mr-auto"> <li class="nav-item"> <a class="nav-link" href="/home" data-page="home">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="/about" data-page="about">About</a> </li> <li class="nav-item"> <a class="nav-link" href="/contact" data-page="contact">Contact</a> </li> </ul> </div> </nav>
解決方案2
0 2019-08-28 16:32:18
因此，如果您有三個獨立的html頁面，則沒有什么可以阻止您將類添加到<body>元素，然后使用javascript查看body class屬性並找到合適的href。 您可以使用Jquery輕松做到這一點。
var bodyClass = $('body').attr('class');
$('[href="/' + bodyClass + '"]').addClass('active');
將“活動”類添加到與當前單擊的側邊欄菜單鏈接相同的href
[英]Add 'active' class to same href as current clicked sidebar menu link
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