Question

I am trying to catch when a user scrolls canvas iframe of facebook app. I tried:

$(window).scroll(...)
$(document).scroll(...)
$(parent).scroll(...)
$(parent.document).scroll(...)

but it doesn’t fire.

Answer 1

I think you mean catch when the user is scrolling the main page, not the iframe, correct?

You can’t do it directly, you will have to use FB.Canvas.getPageInfo as descibed at http://developers.facebook.com/docs/reference/javascript/FB.Canvas.getPageInfo/ . You can’t “catch” it as an event, but you can poll the scroll values using setInterval or similar to detect when the page position has changed.