291025 - Textarea focus jumps up when typing more than the visual area can contain

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Victor]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.7) Gecko/20050414 Firefox/1.0.3 - Nbt (Suporte)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.7) Gecko/20050414 Firefox/1.0.3

When using javascript "slice()" function to limit a textarea, and the text
exceeds the visible area, the function move the focus to the top of the
textarea, confusing the writing.

Reproducible: Always

Steps to Reproduce:
1.Make a form with a textarea;
2.Limit textarea using slice(): onkeyup="this.value=this.value.slice(0,100);"


Actual Results:  
When writing in the created textarea, and the text exceeds the visible area, the
function move the focus to the top of the textarea, confusing the writing.

Expected Results:  
The focus need to continue in the cursor (end of text / end of textarea), like
Opera and Internet Explorer.

Comment 1

[Peter van der Woude [:Peter6]]

Attachment: testcase

just type more than 15 characters, includung some spaces.

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050419
Firefox/1.0+

WFM

Comment 2

[Victor]

(In reply to comment #1)
> Created an attachment (id=181194) [edit]
> testcase
> 
> just type more than 15 characters, includung some spaces.
> 
> Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050419
> Firefox/1.0+
> 
> WFM

But in your example, the text size is limited to the textarea visible area (15
characters).
The problem occur when the text size exceeds the visible area.

Comment 3

[Peter van der Woude [:Peter6]]

(In reply to comment #2)
> (In reply to comment #1)
> > Created an attachment (id=181194) [edit] [edit]
> > testcase
> > 
> > just type more than 15 characters, includung some spaces.
> > 
> > Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050419
> > Firefox/1.0+
> > 
> > WFM
> 
> But in your example, the text size is limited to the textarea visible area (15
> characters).
> The problem occur when the text size exceeds the visible area.
> 
> 

Just attach an example please, makes it a lot easier

Comment 4

[Victor]

> Just attach an example please, makes it a lot easier

http://www.powernetpages.com.br/diversos/firefox_bug.html

Comment 5

[Peter van der Woude [:Peter6]]

Attachment: testcase

testcase showing the problem.
type 100 characters and see where the cursor goes

Comment 6

[Peter van der Woude [:Peter6]]

->NEW

Comment 7

[Victor]

>> type 100 characters and see where the cursor goes

Obs. You dont need to reach the 'slice()' limit (in this example, 100
characters) to see the problem.

The problem occur when the text size exceeds the visible area of the textarea.

Comment 8

[buovjaga]

(In reply to Peter van der Woude [:Peter6] from comment #5)
> Created attachment 181289 [details]
> testcase
> 
> testcase showing the problem.
> type 100 characters and see where the cursor goes

Not reproduced. Closing as WFM.

Arch Linux, FF 50.1.0
Win 10, FF 50.1.0