摺疊的引導程序導航欄不顯示

Question

所以當摺疊時，我的導航欄菜單按鈕起作用，但在快速加載動畫之後，菜單消失。不知道爲什麼會發生這種情況，我搜索了其他問題和引導文檔，無法弄清楚。該網站是http://philipeckert.com

HTML：

<nav class="navbar navbar-default navbar-fixed-top"> 
    <div class="container-fluid"> 
    <div class="navbar-header"> 
     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"> 
     <span class="sr-only">Toggle navigation</span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     </button> 
     <a class="navbar-brand" href="#brand">Eckert</a> 
    </div> 
    <div class="collapse navbar-collapse" id="navbar"> 
     <ul class="nav navbar-nav navbar-right"> 
     <li><a href="#gohereforabout">About</a></li> 
     <li><a href="#Portfolio">Portfolio</a></li> 
     <li><a href="#Contact">Contact</a></li> 
     </ul> 
    </div> 
    </div> 
</nav> 

CSS：

.navbar-default { 
    background-color: rgb(0, 32, 128); 
    border-color: #000000; 
} 

.navbar-default .navbar-brand { 
    color: white; 
} 

.navbar-default .navbar-toggle .icon-bar { 
    background-color: white; 
} 

.nav.navbar-nav.navbar-right li a { 
    color: white; 
    font-family: 'Ubuntu', sans-serif; 
} 

@media (max-width: 990px) { 
    .navbar-header { 
     float: none; 
    } 
    .navbar-toggle { 
     display: block; 
    } 
    .navbar-collapse { 
     border-top: 1px solid transparent; 
     box-shadow: inset 0 1px 0 rgba(255,255,255,0.1); 
    } 
    .navbar-collapse.collapse { 
     display: none!important; 
    } 
    .navbar-nav { 
     float: none!important; 
     margin: 7.5px -15px; 
    } 
    .navbar-nav>li { 
     float: none; 
    } 
    .navbar-nav>li>a { 
     padding-top: 10px; 
     padding-bottom: 10px; 
    } 
} 

Answer 1

只需從@media查詢中刪除.navbar-collapse.collapse CSS：

/*Remove this */ 
.navbar-collapse.collapse { 
     display: none!important; 
} 

這裏是提琴演示：https://jsfiddle.net/2pua65co/

Answer 2

刪除這個CSS您的style.css線30號

.navbar-collapse.collapse { 
    display: none !important; 
} 

Answer 3

您需要添加此CSS規則爲您崩潰的功能特性：

.navbar.navbar-default .collapse.in { 
    display: block !important; 
} 

更多信息，請參見Collapse Usage。

工作實施例：

.navbar.navbar-default { 
 
    background-color: rgb(0, 32, 128); 
 
    border-color: #000000; 
 
} 
 
.navbar.navbar-default .navbar-brand { 
 
    color: white; 
 
} 
 
.navbar.navbar-default .navbar-toggle .icon-bar { 
 
    background-color: white; 
 
} 
 
.navbar.navbar-default .navbar-nav.navbar-right li a { 
 
    color: white; 
 
    font-family: 'Ubuntu', sans-serif; 
 
} 
 
@media (max-width: 990px) { 
 
    .navbar.navbar-default .navbar-header { 
 
    float: none; 
 
    } 
 
    .navbar.navbar-default .navbar-left, 
 
    .navbar.navbar-default .navbar-right { 
 
    float: none !important; 
 
    } 
 
    .navbar.navbar-default .navbar-toggle { 
 
    display: block; 
 
    } 
 
    .navbar.navbar-default .navbar-collapse { 
 
    border-top: 1px solid transparent; 
 
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1); 
 
    } 
 
    .navbar.navbar-default.navbar-fixed-top { 
 
    top: 0; 
 
    border-width: 0 0 1px; 
 
    } 
 
    .navbar.navbar-default .navbar-collapse { 
 
    overflow: hidden; 
 
    } 
 
    .navbar.navbar-default .navbar-collapse.collapse { 
 
    display: none!important; 
 
    } 
 
    .navbar.navbar-default .navbar-nav { 
 
    float: none!important; 
 
    margin-top: 7.5px; 
 
    } 
 
    .navbar.navbar-default .navbar-nav > li { 
 
    float: none; 
 
    } 
 
    .navbar.navbar-default .navbar-nav > li > a { 
 
    padding-top: 10px; 
 
    padding-bottom: 10px; 
 
    } 
 
    .navbar.navbar-default .collapse.in { 
 
    display: block !important; 
 
    } 
 
    .navbar.navbar-default .navbar-nav .dropdown-menu > li > a, 
 
    .navbar.navbar-default .navbar-nav .dropdown-menu > li > a:hover, 
 
    .navbar.navbar-default .navbar-nav .dropdown-menu > li > a:focus { 
 
    color: #777; 
 
    } 
 
}

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"> 
 
<nav class="navbar navbar-default navbar-fixed-top navbar"> 
 
    <div class="container-fluid"> 
 

 
    <div class="navbar-header"> 
 
     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"> 
 
     <span class="sr-only">Toggle navigation</span> 
 
     <span class="icon-bar"></span> 
 
     <span class="icon-bar"></span> 
 
     <span class="icon-bar"></span> 
 
     </button> 
 
     <a class="navbar-brand" href="#brand">Eckert</a> 
 
    </div> 
 

 
    <div class="collapse navbar-collapse" id="navbar"> 
 
     <ul class="nav navbar-nav navbar-right"> 
 
     <li><a href="#gohereforabout">About</a> 
 
     </li> 
 
     <li><a href="#Portfolio">Portfolio</a> 
 
     </li> 
 
     <li><a href="#Contact">Contact</a> 
 
     </li> 
 
     </ul> 
 
    </div> 
 

 
    </div> 
 
</nav> 
 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script> 
 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>