Js stickit sidebar

var $sticky = $(".sticky-column").stickit({				
  scope: StickScope.Parent,				
  top: 20,
  screenMinWidth: 980
});	

$sticky.bind('stickit:end', function () {
  $('.sticky-column').addClass('bottom-0');
});
$sticky.bind('stickit:stick', function () {
  $('.sticky-column').removeClass('bottom-0');
});

https://github.com/emn178/jquery-stickit