How to synchronize $scope which is in iframe?

Question

JavaScript

I can't figure out how to update $scope between iframe and parent window.
iframe refers to the same domain as parent.
For clarity, I made an example with the code plnkr.co/edit/HpFJNxPVWsi0ijk6spaI?p=preview
PS / I found this option but I can't figure out how to use it
stackoverflow.com/questions/18437594/angularjs-cal...

Answer 1

Found this but I can't figure out how to use it.

Probably forgot to call the digest.
Here is a working example: plnkr.co/edit/xNGy4yAvDstArE15dMRO?p=preview