<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> <nav class="navbar navbar-default"> <div class="container-fluid"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" 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</a> </div> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <!--<ul class="nav navbar-nav"> <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li> <li><a href="#">Link</a></li> </ul>--> <ul class="nav navbar-nav navbar-right"> <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li> <li><a href="#">Link</a></li> <li><a href="#">Link</a></li> </ul> </div> </div> </nav>
I am having trouble with this snippet of code:
.navbar-default .navbar-nav > .active > a:after {
content: "";
position: absolute;
width: 100%;
height: 3px;
bottom: 0;
left: 0;
background-color: #1B94E1;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transition: all 0.3s ease-in-out 0s;
transition: all 0.3s ease-in-out 0s;
}
Essentially, I want to use the CSS ::after
pseudoclass to create an underline of sorts. However, nothing seems to be happening. Note that I am using Bootstrap and applying these styles to the navbar. Thanks!
Here is a codepen: http://codepen.io/Hudson_Taylor11/pen/ZBGGXQ
Commenting out your transitions fixes it.
.navbar-default .navbar-nav > .active > a:after {
content: "";
position: absolute;
width: 100%;
height: 3px;
bottom: 0;
left: 0;
background-color: #1B94E1;
/* -webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transition: all 0.3s ease-in-out 0s;
transition: all 0.3s ease-in-out 0s;
*/
}
http://codepen.io/0rfila/pen/rWVVqj
Here's some more info on animating pseudos: https://cssanimation.rocks/pseudo-elements/
Here is the working codepen
.navbar-default .navbar-nav a { border-bottom: 2px solid red; padding: 0px; margin: 15px; }
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.