Here’s how to do it with plain JQuery using scrollTo()
$('.main-nav a').on('click', function(e) {
var el = $( e.target.getAttribute('href') );
var elOffset = el.offset().top;
var elHeight = el.height();
var windowHeight = $(window).height();
var offset;
if (elHeight < windowHeight) {
offset = elOffset - ((windowHeight / 2) - (elHeight / 2));
}
else {
offset = elOffset;
}
var speed = 700;
$('html, body').animate({scrollTop:offset}, speed);
});
This is a combination of straker’s code and code from this question: jQuery scrollTo – Center Div in Window Vertically