465112 - "instanceof Object" yields false for contentDocument of iframe

Status: RESOLVED DUPLICATE of bug 339884

(Firefox :: General, defect)

Description

[Serge van den Boom]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008092416 Firefox/3.0.3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008092416 Firefox/3.0.3

"frame.contentDocument instanceof Object" yields false when "frame" is an HTMLIFrameElement.


Reproducible: Always

Steps to Reproduce:
1. Create an iframe with a page in it which falls within the same origin policy of the parent document. about:blank will do.
2. With JavaScript, get the contentDocument of the frame
3. use the "instanceof" operator on it with "Object": "frame instanceof Object"

Actual Results:  
"instanceof" yields false here.


Expected Results:  
"instanceof" should yield true here.

Comment 1

[Serge van den Boom]

Attachment: test case