1212116 - No wheel events fire on disabled <input> elements

Status: RESOLVED FIXED

(Core :: DOM: Events, defect)

Description

[Vergil Penkov]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36

Steps to reproduce:

1) I used a plugin to style the scrollbar on Firefox. The plugin doesn't really matter, every mature javascript plugin behaves like demonstrated.
2) I'm having an <input type="text" disabled> (could be a textarea, also applicable on mobile devices)


Actual results:

When I hover the disabled input and use mousescroll, nothing happens.
Video: https://www.youtube.com/watch?v=7FGel8wdi9Y&hd=1


Expected results:

It should scroll like the other browsers do.

Comment 1

[:Gijs (he/him)]

(In reply to Vergil Penkov from comment #0)
> User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML,
> like Gecko) Chrome/45.0.2454.101 Safari/537.36
> 
> Steps to reproduce:
> 
> 1) I used a plugin to style the scrollbar on Firefox. The plugin doesn't
> really matter, every mature javascript plugin behaves like demonstrated.

Can you please give a more complete testcase in a jsbin, codepen, jsfiddle, or by attaching a file or set of files to this bug?

At the moment it's not clear whether, say, that scrollbar is entirely constructed in client DOM, or whether you simply mean that the container has overflow-y: scroll or auto and there's some CSS that styles the scrollbars, or something else still. In order to reproduce and work out what the problem is, that's quite important information to have.

Comment 2

[Vergil Penkov]

http://jsfiddle.net/1uzug7jn/

There's a link.
This happens with every custom scrollbar plugin.

Comment 3

[:Gijs (he/him)]

I created a minimal-ish testcase: http://codepen.io/anon/pen/BjyxrN . Olli or Neil, do you know what's going on here?

Comment 4

[Olli Pettay [:smaug][[e-mail]]]

It is unspecified which events should fire on disabled elements, different browsers fire different events.
And we're too strict here.

Comment 5

[Vergil Penkov]

Just to further clarify, this is an issue with <textarea> elements as well. Presumably <button> also.

Comment 6

[Olli Pettay [:smaug][[e-mail]]]

Yes, various form elements (not talking about <form> but <input> etc as form elements.)

Comment 7

[Olli Pettay [:smaug][[e-mail]]]

Attachment: patch

Comment 8

[Olli Pettay [:smaug][[e-mail]]]

note, the patch affects just which events are dispatched to dom, not what is being scrolled.

Comment 9

[Boris Zbarsky [:bzbarsky]]

Comment on attachment 8724054 [details] [diff] [review]
patch

r=me

Comment 10

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/c728ed2a0ba9

Comment 11

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/c728ed2a0ba9