Bootstrap sticky navbar

by Ondrej

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/js/bootstrap.bundle.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Demo header-->
<section class="py-5 header text-center">
    <div class="container py-5 text-white">
        <header class="py-5">
            <h1 class="display-4">Bootstrap sticky navbar</h1>
            <p class="font-italic mb-1">Create a sticky top navbar using Bootstrap 4 utility classes.</p>
            <p class="font-italic">Snippet by
                <a class="text-white" href="https://bootstrapious.com/">
                    <u>Bootstrapious</u>
                </a>
            </p>
        </header>
    </div>
</section>


<!-- Sticky navbar-->
<header class="header sticky-top">
    <nav class="navbar navbar-expand-lg navbar-light bg-white py-3 shadow-sm">
        <div class="container"><a class="navbar-brand" href="#">
            <strong class="h6 mb-0 font-weight-bold text-uppercase">Sticky navbar</strong></a>
            <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button>
            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav ml-auto">
                    <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="#">Link</a></li>
                    <li class="nav-item"><a class="nav-link disabled" href="#">Disabled</a></li>
                </ul>
       ...

CSS

/*
*
* ==========================================
* FOR DEMO PURPOSES
* ==========================================
*
*/
.text-small {
    font-size: 0.9rem !important;
}

.header {
    background-color: #00d2ff;
    background-image: linear-gradient(to right, #00d2ff 0%, #3a7bd5 100%);
}

.section-1 {
    background: #f5f5f5;
}

.section-2 {
    background: #F1F1F1;
}

.section-3 {
    background: #EAEAEA;
}

.section-4 {
    background: #E5E5E5;
}