1384973 - overlay div stops getting focus when column in table underneath is collapsed

Status: UNCONFIRMED

(Core :: Layout, defect, P3)

Description

[Jean-Marc Andreoli]

Attachment: a.html

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID: 20170628075643

Steps to reproduce:

I wrote an HTML file (attached) with
* a table
* a div inside one of the table cells, containing a checkbox with an "onchange" event handler which shows its status in a separate textbox
* a separate button which collapses one of the columns of the table when clicked.



Actual results:

If the div is normally displayed inline, everything works fine. When the div is set as an overlay (using the "position" and "z-index" style attributes), everything works fine, until the collapse button is clicked. Then the checkbox stops working, and it seems the whole div is not capable of getting focus anymore.



Expected results:

I cannot see why collapsing a column of the table should have an impact on an overlay based in a cell which is not collapsed.