1353252 - [e10s] select - options styling doesn't work properly if CSS transitions are present

Status: RESOLVED DUPLICATE of bug 1352963

(Core :: Layout: Form Controls, defect)

Description

[684sigma]

Attachment: options styling doesn't work (CSS transitions), by reporter.html

I noticed a problem in Nightly 55. It doesn't happen in ESR 45.
Transitions set to options of <select> element don't work and also cause some glitches.
There're two ways to reproduce the bug

First:
1. Open attached page
2. Hover mouse over the first select, click on the select in the middle of transition (after 2s)

Result: all options contain gray text on gray background.
Expected: all options should be styled the same way as select at any time.


Second:
1. Open attached page
2. Click on the second select, hover mouse over option "Third"

Result: two options are highlighted as blue.
Expected: one opetion should look selected.


My thoughts
You can see that this bug contains two examples - that's because even if implementation of color transitions (that would fix both cases) is WONTFIX, then the second scenario still seems valid, because if CSS transitions are not supported, then transitions set in CSS shouldn't affect the number of selected items (actually, shouldn't affect options at all).

Comment 1

[Jared Wein [:jaws] (please needinfo? me)]

The second bug described is on file as bug 1353222.

Comment 2

[Jared Wein [:jaws] (please needinfo? me)]

The first bug described is a duplicate of bug 1352963.