184928 - DIV using absolute position causes under- or overlying clickable region to become inert.

Status: VERIFIED DUPLICATE of bug 102695

(Core :: DOM: Core & HTML, defect)

Description

[Richard R. Kramer]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130

The example has two buttons, one of which is partially "inside" a DIV, the other
wholely. The DIV is positioned via position: absolute. The portions of the
buttons inside the DIV are not clickable. Futzing with z-index seems to have no
effect.

Reproducible: Always

Steps to Reproduce:
1.Try to click the right hand "ClickMe" button.
2. Click the left side of the left button.

Actual Results:  
1. Zilch
2. An alert dialog appeared, announcing that "It worded."

Expected Results:  
In both cases, I expected to see the alert dialog.

This looks similar to bug#35440.

Comment 1

[David Brittain]

Is this a dupe of bug 178569?

Comment 2

[Felix Miata]

I see the behavior described in today's Linux, OS/2 & W32 trunks. Would mark new
except that I have no idea that this isn't WAD.

Comment 3

[Boris Zbarsky [:bzbarsky]]

The div is above the buttons, so it catches the mouse events.  

z-index only applies to positioned elements, so setting it on the button in 
that testcase does absolutely nothing.

*** This bug has been marked as a duplicate of 102695 ***

Comment 4

[Henrik Skupin [:whimboo][⌚️UTC+1]]

verified.