// When reading a post, update the on scroll $(window).scroll(function () {

var position = $(this).scrollTop();
var $sections = $(":header");
var navbarHeight = getNavbarHeight();

$sections.each(function () {
    var target = $(this).offset().top - navbarHeight;
    var id = $(this).attr('id');

    if (position >= target) {
        $('a').removeClass('active');
        $('a[href="#' + id + '"]').addClass('active');
    }
});

});

getNavbarHeight = () => {

let menu = document.getElementById("menu");
let menuStyle = getComputedStyle(menu);
let pad = 50;
return (parseInt(menuStyle.height) + pad)

}