title: Adding a class to sweet alert 2
body: <p>This question has been raised for sweetalert 1
  <a href="https://stackoverflow.com/questions/48985966/adding-class-to-sweet-alert">Adding class to sweet alert</a></p>
  
  <p>Now my question is, how can i add a custom class in sweetalert2?</p>
  
  <p>className: "new_class" does not work for me.</p>