var content = '<div class="content"></div>';
var container = $('.container');
var toggler = $('.toggler');

toggler.click(function() {
  if (container.hasClass('open')) {
    container.removeClass('open');
    container.html(undefined);
    container.slideUp('slow');
  } else {
    container.addClass('open');
    container.html(content);
    container.slideDown('slow');
  }
})