$(window).scroll(function() {
if ($(document).scrollTop() > 50) {
$('nav').addClass('shrink');
} else {
$('nav').removeClass('shrink');
}
});
nav.navbar.shrink {
width: 100%;
height: 35px;
background-color: #111;
box-shadow: 0 1px 0 0 #dadada;
position: fixed;
left: 0px;
transition: all 1.5s ease;
}
nav.navbar.shrink .navbar-brand img{
height: 50px;
width: 120px;
transition: all 1.5s ease;
}
nav.navbar.shrink a {
font-size: 14px;
padding-bottom: 10px !important;
padding-top: 10px !important;
transition: all 1.5s ease;
}
nav.navbar.shrink .navbar-toggler {
margin: 8px 15px 8px 0;
padding: 4px 5px;
transition: all 1.5s ease;
}
.header{
\t
\t height:100px;
}
.navbar-brand{
\t padding-left:30px;
\t padding-top:30px;
\t padding-bottom:30px;
}
.collapse{
\t padding-right:30px;
}
.logo{
\t width: 170px;
\t height: 58px;
}
.hero-container p{
color:black;
text-align: center;
height:auto;
}
.image-container{
\t text-align:center;
}
.banner{
\t background-image: url(../images/banner.jpg);
\t background-repeat: no-repeat;
\t padding-top: 70px;
\t padding-left: 30px;
\t padding-right:30px;
\t padding-bottom: 78px;
\t width:100%;
\t height:auto;
}
.banner .row h4,p{
color: white;
}
.client{
\t height: 635px;
\t margin-top:74px;
\t padding-right:10px;
\t padding-left:10px;
}
.btn-primary{
\t
\t background: transparent;
\t width:170px;
\t border: 1px solid white;
\t color:white;
}
form{
padding-top:56px;
padding-bottom:56px;
\t padding-left: 30px;
height:auto;
\t }
form,h2,label{
\t color:white;
}
.above{
\t margin-bottom:34px;
\t width:100%;
\t height:auto;
\t padding-right: 30px;
}
.below{
\t width:100%;
\t height:auto;
padding-right: 30px;
}
.heading{
\t color: black;
\t margin-top: 62px;
}
.lead{
color:black;
}
.form_banner{
\t background-image: url(../images/form_banner.jpg);
\t background-repeat: no-repeat;
\t
width: 100%;
}
.contact{
\t background-image: url(../images/contact.png);
\t background-repeat: no-repeat;
\t margin-bottom: 40px;
\t margin-top:50px;
\t height:auto;
\t width:100%;
\t padding-left: 313px;
\t padding-right:313px;
\t padding-top: 64px;
\t padding-bottom:64px;
\t text-align: center;
}
.contact, h5{
\t color:white;
}
hr{
\t display: block;
margin-top: 0.1em;
margin-bottom: 0.1em;
margin-left: auto;
margin-right: auto;
border-style: inset;
border-width: 1px;
}
.footer_img{
\t padding-left: 30px;
\t width:170px;
\t height:63px;
}
.footer{
\t margin-bottom: 41px;
}
<!doctype HTML>
<html lang="en">
<head>
<title>Home</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<link rel="stylesheet" href="css/styles.css">
</head>
<body>
<div class="container-fluid">
<div class="header container">
<div class="row">
<nav class="navbar navbar-expand-md navbar-light bg-light fixed-top">
<a class="navbar-brand" href="#">HeRo</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 active">
<a class="nav-link" href="#">Company<span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Capabilities</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Customers</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Innovation</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact Us</a>
</li>
</ul>
</div>
</nav>
</div>
</div>
</div>
<div class="hero-container container">
<div class="row">
<div class="col">
<p>Commerce</p>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details »</a></p>
</div>
<div class="col">
<p>Interactive</p>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details »</a></p></div>
<div class="col">
<p>Analytics</p>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details »</a></p></div>
<div class="col">
<p>Integration</p>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details »</a></p></div>
<div class="col">
<p>Cloud & Management Services</p>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details »</a></p></div>
</div>
</div>
<div class="banner container-fluid">
<div class="row">
<h4>Dedicated, Experience, Innovative</h4>
<p>For over a decade our experienced team has been delivering Digital Commerce solutions that change the way consumers research, interact and purchase. As mobility and pervasive connectivity continue to transform buying habits, we are focused on helping businesses discover and maximise new opportunities – be it direct to consumers, via resellers, or by other innovative models.</p>
<p>Our expertise is centred on the Digital Commerce solution that excels in delivering best-in-class Scalability and User Experience. From our global headquarters in India, we have expanded to empower Clients across four continents, with offices located in Singapore, USA, Australia and the UK.</p>
<h4>BUSINESS</h4>
<p>Our approach is to listen to you as the experts in your market. We look to complement your insight with a project team capable of understanding your business and delivering better digital experience. Our in-country Advisors will help assess your requirements and collaboratively design a service that meets your strategic goals.</p>
<h4>TECHNOLOGY</h4>
<p>With a specialised team of Creative Designers, Developers, Engineers and Architects we have substantial experience across many leading enterprise and open source platforms. Beyond our core expertise in Digital Commerce, we also offer Mobility, Integration, Digital Analytics, Development and other custom Web and applications development services.</p>
</div>
</div>
<!-- FOOTER -->
<div class="footer container">
<div class="clearfix">
<span class="float-left"><a href="#"><img class="footer_img" src="images/ibm_logo.png"></a></span>
<span class="float-right">© AbcXyZ Inc and Affiliates.All Rights Reserved</span>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
</body>
</html>
http://bootsnipp.com/snippets/pjvmD – mlegg
此答案适用于v4 https://stackoverflow.com/a/24765232/253096 – TimoSolo
@TimoSolo - 该答案似乎不适用于Bootstrap 4 – ZimSystem