facebook - What are the benefits of using FBJS vs. an iFrame with jQuery -

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i looking turning javascript app (using jquery) facebook widget, , wondering benefit of using fbjs on iframe app's current javascript code & libraries... can facebook app developers out there comment on this?

facebook moving away fbml/fbjs , encouraging developers use iframes pages , applications:

https://developers.facebook.com/blog/post/402/

https://developers.facebook.com/blog/post/462/


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