1334723 - cursor goes to the bottom of textarea in the stackoverflow.com editor in firefox 51

Status: RESOLVED DUPLICATE of bug 1337392

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

Description

[Fred]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20170125094131

Steps to reproduce:

Nothing; the cursor is automatically focused inside the StackOverflow.com editor at the wrong position. One would need to have an account at http://stackoverflow.com/ and have the privileges of being able to edit questions/answers on their website.


Actual results:

The cursor automatically jumps/focuses to the bottom of the StackOverflow.com editor, as opposed to it being at the top left when editing a question or an answer on the StackOverflow.com and meta.StackOverflow.com websites. This did not happen prior to version 51. 


Expected results:

The cursor should have stayed on the top left corner of the editor's textarea of a question/answer.

Comment 1

[Fred]

This only seems to happen on my Windows 7 OS and not on a Linux Mint box. A few people I know can confirm this same behaviour.

Comment 2

[:Gijs (he/him)]

Not a security bug.

Comment 3

[Loic]

Without an account to test, it will be hard to find a regression and debug. Is it possible to provide a guest account?

Comment 4

[Kaiido]

I can confirm on 52 and 53 on macOS.

Here is a public fiddle : https://jsfiddle.net/zevp3dpa/

Comment 5

[Kaiido]

(In reply to Kaiido from comment #4)
> I can confirm on 52 and 53 on macOS.
> 
> Here is a public fiddle : https://jsfiddle.net/zevp3dpa/

54 affected too + updated fiddle for 51 : https://jsfiddle.net/zevp3dpa/1/.

If someone can remove the previous comment. Sorry for the noise.

Comment 6

[Fred]

(In reply to Loic from comment #3)
> Without an account to test, it will be hard to find a regression and debug.
> Is it possible to provide a guest account?

No, that is not possible.

Comment 7

[Loic]

(In reply to Fred from comment #6)
> (In reply to Loic from comment #3)
> > Without an account to test, it will be hard to find a regression and debug.
> > Is it possible to provide a guest account?
> 
> No, that is not possible.

No need, Kaiido provided a testcase.

Comment 8

[Loic]

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d320ef56876f52db9bc0eb79554c7332d4793769&tochange=6b65dd49d4f045c0a9753ce60bdb4b7b4aaedcf8

It's due to:
Decky Coss — Bug 1287655 - place textarea/input cursor at end of text when initialized; r=smaug

And I think it's the normal behavior per spec now.

Comment 9

[Fred]

What I find strange is that this doesn't happen on Linux Mint with FF 51, only on my Windows 7. The cursor stays on the top left in Linux (Mint) and not at the end of the element (in Windows).

Comment 10

[Loic]

Decky, any idea why after your patch?

Comment 11

[Loic]

Olli, could you explain if it's the normal behaviour per spec now.
Another dupe has been filed (bug 1337392).

Comment 12

[Petr Hroudný]

Well, the testcase from comment 5 places cursor at the end of textarea only in Firefox 51, other browsers (including Chrome 56, mentioned in Bug 1287655 as reference) place the cursor at the beginning of textarea.

Comment 13

[(no longer active)]

This being discussed in bug 1337392.