Bootstrap 3 - Centered modals

// Bootstrap - Centered modals // phase one - store every dialog's height $('.modal').each(function () { var t = $(this), d = t.find('.modal-dialog'), fadeClass = (t.is('.fade') ? 'fade' : ''); // render dialog t.removeClass('fade').addClass('invisible').css('display', 'block'); // read and store dialog height d.data('height', d.height()); // hide dialog again t.css('display', '').removeClass('invisible').addClass(fadeClass); }); // phase two - set margin-top on every dialog show $('.modal').on('show.bs.modal', function () { var t = $(this), d = t.find('.modal-dialog'), dh = d.data('height'), w = $(window).width(), h = $(window).height(); // if it is desktop & dialog is lower than viewport (set your own values) if (w > 380 && (dh + 60) < h) { d.css('margin-top', Math.round(0.96 * (h - dh) / 2)); } else { d.css('margin-top', ''); } });