278828 - ".on[eventtype]" - Events don't work with designmode set to "on"

Status: RESOLVED INVALID

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Simon Sattes]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; de-DE; rv:1.7.5) Gecko/20041108 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; de-DE; rv:1.7.5) Gecko/20041108 Firefox/1.0

If designmode is enabled for an iframe, attaching an event like
"contentWindow.onkeypress"(or any other event) to the content of this iframe 
doesn't work, although it's correctly assigned, which can be checked by throwing
an alert with the event. Setting events by "AddEventListener("keypress"...)
*does* work though.
I'll add a code snippet.



Reproducible: Always

Steps to Reproduce:
1. assigning event contentWindow.onkeypress
2. setting designmode for the iframe to "on"

Actual Results:  
The event is not fired although it's there.

Expected Results:  
Event should be fired.

Comment 1

[Simon Sattes]

Attachment: Proof for failed event with designmode enabled

Comment 2

[Boris Zbarsky [:bzbarsky]]

<script> execution and compilation of event handler attributes is disabled in
HTML that is being edited, since you typically do not want scripts running as
you type them in.

Comment 3

[Simon Sattes]

If you were right, then the event assigned with "AddEventListener" shouldn't
work, too (but it does as I wrote above).

Comment 4

[Hixie (not reading bugmail)]

reopening -- seems like window.onfoo and window.addEventListener('foo') should
act equivalently, no?

Comment 5

[Boris Zbarsky [:bzbarsky]]

As I said in comment 2, what's disabled is <script> execution and compilation of
event handlers. If an already-compiled listener is added (which is what
addEventListener does), it will work.  We want this -- eg we want to be able to
add chrome listeners to document being edited.  Also see next paragraph.

Ian, your two examples in comment 4 add listeners compiled against different
scopes and running in different security contexts.  So no, they are not equivalent.