How to initialize the Invitation dialog (not the apprequest one)?

Question

There are a lot of applications that use an Invitation dialog, like this one here:

However I find no documentation or a single topic describing this specific dialog. It is not the same as the apprequest dialog which is mostly referred to as the 'invitation dialog'.

Answer 1

That dialog is built with the FBML API. A good example can be found here. However this API is in process of deprecating.

With the new JavaScript SDK you can initialize an application invitation, using the Request Dialog.