"ONscroll nav class add for bg change etc"
Bootstrap 4.1.1 Snippet by iammohitverma

<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2> </div> </div>
jQuery(window).scroll(function() { var scroll = jQuery(window).scrollTop(); if (scroll >= 300) { jQuery(".header-bg").addClass("darkHeader"); } else { jQuery(".header-bg").removeClass("darkHeader"); } });

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