JS Divi Stick Footer to Bottom

<script>
    jQuery(document).ready(function($){
    var th = $('#top-header').height() || 0;
    var hh = $('#main-header').height() || 0;
    var fh = $('#main-footer').height() || 0;
    var wh = $(window).height();
    var ch = wh - (th + hh + fh);
        $('#main-content').css('min-height', ch);
    });
</script>