[英]Collapsed Navbar only showing on small screen size bootstrap
我正在嘗試實現一個在小型設備上折疊的導航欄。 這工作正常。
但是,在中型和大型屏幕上,導航欄根本不顯示。 我希望導航欄對於中型和大型屏幕看起來像普通導航欄,然后折疊成小型設備的導航欄按鈕。 我正在遵循引導程序模板,但不知道為什么導航欄根本不顯示。
<div class = "container">
<nav class="navbar navbar-default" >
<div class="navbar-header">
<a class="navbar-brand" href="#">
<img alt="logo" src="logo.png" width="250px;">
</a>
<button class="navbar-toggle collapsed" type="button" data-toggle="collapse" data-target="#collapse-navbar" aria-expanded="false" aria-controls="navbar">
☰
</button>
</div>
<div class="navbar-collapse collapse" id="collapse-navbar">
<ul class="nav navbar-nav">
<li class= "nav-item"><a class= "nav-link active" href="#">Home</a></li>
<li class= "nav-item"><a class= "nav-link" href="#">Build</a></li>
<li class= "nav-item"><a class= "nav-link" href="#">About</a></li>
</ul>
</div>
</nav>
</div>
這是代碼筆鏈接: https ://codepen.io/gkunthara/pen/VWdrYj
您正在使用 bootstrap 3 標記並鏈接到 bootstrap 4 css 或者鏈接到 bootstrap 3 的 css 和 javascript,如下所示:
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
或者將您的導航欄標記更改為 bootstrap 4 的標記,如下所示:
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">
<img alt="logo" src="logo.png" width="250px;">
</a>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Build</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About</a>
</li>
</ul>
</div>
</nav>
您需要在中大屏幕上顯示.navbar-header button
。 所以改變
@media (min-width: 768px)
{
.navbar-toggle {
display: none;
}
}
這給
@media (min-width: 768px)
{
.navbar-toggle {
display: none;
}
.navbar-header button {
display: block;
}
}
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