121226 - HTMLIFrameElement with CSS display set to none looses content

Status: RESOLVED DUPLICATE of bug 52334

(Core :: DOM: CSS Object Model, defect)

Description

[Martin Honnen]

It seems that Mozilla looses the document content of an iframe when you set the
CSS display property of the HTMLIFrameElement to none. It seems that the iframe
is reloaded when you make it visible again, meaning all changes done via the dom
are lost. Very annoying.
IE6 gets it right, also Mozilla gets it right when you simply set visibility to
hidden instead of using display but display: none should result in a loss of
content.
I will attach a test case.

Comment 1

[Martin Honnen]

Attachment: dummy iframe document needed for test case

Comment 2

[Martin Honnen]

Attachment: test case (hide iframe via visibility and content is preserved, when display is used the content is lost with Mozilla but not IE6)

As for the test case, if you use the third button to hide and the the fourth
button to show the iframe again you see that the changes done to the iframe's
document are preserved. However when you use the first button to hide the
iframe and the second to show it again (these buttons toggle the CSS display
property) then the content of the iframe document is not preserved, instead the
original iframe document is displayed again, with all changes done in the
meantime being lost.

Comment 3

[Christopher Aillon (sabbatical, not receiving bugmail)]

dupe of 52334

*** This bug has been marked as a duplicate of 52334 ***