When getting javascript to interact between documents. postMessage is the proper way to do it.
https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
exact implementation is up to you depending on your problem.
Solution 1 :
Problem :
When I have HTML embedded in another server’s response and I own both of the servers, Is it possible to allow the embedded document to access the parent document or vis versa?
server one returns
<embed src="http://server_2.com/stuff"></embed>
I want to listen for JS events from one doc to the other.
Perhaps there is a header I can set?