Get javascript variable in an iframe from parent window in a different domain

Question

I have an iframe in a domain "someplace.com" being loaded into "anotherplace.com" 's window.

Old questions say you can't access variables across domains: Sharing global javascript variable of a page with an iframe within that page

But now that we have CORS, I'm wondering if this is possible. Are we now able to access JS variables in an iframe's parent if we enable CORS between the domains?

CORS is about HTTP requests – so if you want to transfer the value via HTTP, that could be a way to go, but it is not direct access to a variable. postMessage would be an alternative to transfer data between window instances from different domains. — C3roe
– C3roe, Commented Apr 3, 2014 at 14:47
If I'm not mistake, CORS is for ajax requests between domains. — Laurent S.
– Laurent S., Commented Apr 3, 2014 at 14:47

Ray Nicholus · Accepted Answer · 2014-04-05 21:12:14Z

3

You need to use the Web Messaging API.

https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage

edited Apr 5, 2014 at 21:12

Ray Nicholus

19.9k14 gold badges65 silver badges85 bronze badges

answered Apr 5, 2014 at 20:58

David Bradshaw

13.2k3 gold badges45 silver badges76 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Get javascript variable in an iframe from parent window in a different domain

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related