當視口大小更改Bootstrap v4時更改導航欄顏色
[英]Change navbar color when viewport size change Bootstrap v4
問題描述
我只是遷移到Bootstrap V4。 我自定義了入門模板： https ： //v4-alpha.getbootstrap.com/examples/starter-template/
我希望navbar是透明的，但當viewport為sm和xs時變為暗。
我試圖使用斷點更改它並添加一個“ navbar-custom”類，但我沒有改變
html { overflow: hidden; height: 100%; } body { padding-top: 5rem; overflow: auto; height: 100%; background: linear-gradient(-45deg, #E8D1E2, #7CC4FF, #FFECBD, #BF9BFA); background-size: 400% 400%; -webkit-animation: Gradient 15s ease infinite; -moz-animation: Gradient 15s ease infinite; animation: Gradient 15s ease infinite; } @-webkit-keyframes Gradient { 0% { background-position: 0% 50% } 50% { background-position: 100% 50% } 100% { background-position: 0% 50% } } @-moz-keyframes Gradient { 0% { background-position: 0% 50% } 50% { background-position: 100% 50% } 100% { background-position: 0% 50% } } @keyframes Gradient { 0% { background-position: 0% 50% } 50% { background-position: 100% 50% } 100% { background-position: 0% 50% } } .navbar { border-top: 2px solid #C66FF4; width: 100% } @media (min-width: 768px) { nav .navbar .navbar-custom { background: rgba(0,0,0,0); } } .starter-template { padding: 3rem 1.5rem; text-align: center; }
<head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1 shrink-to-fit=no"> <meta name="description" content="Full-Stack Graphic Designer, Illustrator, Front-End Development"> <meta name="author" content="Liliana Orozco"> <meta name="keywords" content="Designer, Creativity, Design, CSS, HTML5, Branding, Logotype, Illustration, Web, Advertising"> <title>Randomood says: Welcome!</title> <!-- Bootstrap 4.0 cdn --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous"> <!--custom styles for this page --> <link href="css/home.css" rel="stylesheet"> </head> <body> <!--navigation--> <nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top navbar-custom"> <!--Brand in navigation menu--> <a class="navbar-brand " href="#">Randomood</a> <!--Brand image in navigation menu--> <a class="navbar-brand" href="#"><img></a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarsExampleDefault"> <ul class="navbar-nav ml-auto"> <li class="nav-item"> <a class="nav-link" href="#">Book</a> </li> <li class="nav-item"> <a class="nav-link" href="#">About</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Contact</a> </li> </ul> </div> </nav> <div class="container"> <div class="starter-template"> <h1>Bootstrap starter template</h1> <p class="lead">Use this document as a way to quickly start any new project.<br> All you get is this text and a mostly barebones HTML document.</p> </div> </div><!-- /.container --> <!--JS, Popper and JQuery--> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script> <script>window.jQuery || document.write('<script src="jquery-slim.min.js"><\\/script>')</script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script> </body>
2 個解決方案
解決方案1
0 2017-09-21 18:21:00
您正在<nav>中使用Bootstrap的.bg-dark類。 此類的CSS聲明是：
.bg-dark {
background-color: #343a40!important;
}
因此，不允許您覆蓋background-color屬性。 為了更改特定屏幕斷點處的background-color屬性，請使用Javascript或Jquery刪除.bg-dark類，然后添加您的自定義類，該類將更改<nav>的background-color屬性。 希望您能清楚我的解釋。
解決方案2
0 2017-10-12 19:23:18
引導主題中的scss輕松實現：
.bg-dark {
background-color: #343a40;
@include media-breakpoint-up(sm) {
background-color: transparent;
}
}
更改導航欄引導程序的文本顏色
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.