Sticky Header/Navi

gistfile1.txt

<script>
jQuery( document ).ready(function($) {

    window.onscroll = function() {
        getSticky();
    };

    var header = document.getElementById("wrapper-navbar");
    var sticky = header.offsetTop;

    function getSticky() {
        if (window.pageYOffset > sticky) {
            header.classList.add("sticky");
            $('#navbarNavDropdown').removeClass('show');
        } else {
            header.classList.remove("sticky");
        }
    }
});
</script>

<style>
.sticky {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
}
</style>