title: Angular2 lifecycle hook for fully loaded?
body: <p>Is there any lifecycle hook, which tells you if all the content is loaded? I'm having a site, which has several asynchronously working components. So the components are not ready at the same time. To avoid a strange appearance of the site, I'd like to put a kind of loading banner in place. But obviously, I need to know when I can disable the banner again. </p>
  
  <p>Thanks for any suggestions or idea! </p>