title: position sticky polyfill with overflow support
body: <p>I am using <code>position: sticky</code> in my app, inside a container who use an <code>overflow</code> property to show a scrollbar. I have searched for a polyfill who does support this condition, but without any luck so far.</p>
  
  <p>Does anyone know such a polyfill/shim who support <code>oveflow</code> ?</p>
  
  <p>Regards</p>