@types/post-robot

Type definitions for the post-robot (opens in a new tab) repo. I currently still actively maintain the type definitions (opens in a new tab). Although, it is very minimal overhead as the post-robot repository does not need to be updated often.

It's a very cool cross domain post messaging tool. It's created and used by Paypal in their "Pay with PayPal" button and they use post-robot to securely communicate with an iframe.