|  | Capturing scroll bar usage on textarea | | |
| | | konryd |  |
|  Posted: Mon May 19, 2008 10:38 pm Post subject: Capturing scroll bar usage on textarea |  |
I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
* by pressing keys
* by moving mouse
* by drag'n'dropping the scroll bar
First two are easy to implement, but the third one doesn't trigger
even document.onmousedown
I investigated on firefox and safari under osx.
Any ideas? Or at least firm confirmation that it cannot be
accomplished?
Konrad |
| |
| | | Joost Diepenmaat | |
| | Posted: Mon May 19, 2008 10:38 pm Post subject: Re: Capturing scroll bar usage on textarea | |
konryd <konryd@gmail.com> writes:
| Quote: | I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
* by pressing keys
* by moving mouse
* by drag'n'dropping the scroll bar
First two are easy to implement, but the third one doesn't trigger
even document.onmousedown
I investigated on firefox and safari under osx.
Any ideas? Or at least firm confirmation that it cannot be
accomplished?
|
I haven't tried this with textareas, but the onscroll event works in
the popular browsers on elements with style overflow: scroll / auto.
--
Joost Diepenmaat | blog: LINK | work: LINK |
| |
| | | Bjoern Hoehrmann | |
| | Posted: Mon May 19, 2008 10:38 pm Post subject: Re: Capturing scroll bar usage on textarea | |
* konryd wrote in comp.lang.javascript:
| Quote: | I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
|
What is wrong with the 'scroll' event? An <textarea onscroll='...'>
certainly works for me in Internet Explorer, perhaps you missed this
event?
--
Björn Höhrmann · mailto:bjoern@hoehrmann.de · LINK
Weinh. Str. 22 · Telefon: +49(0)621/4309674 · LINK
68309 Mannheim · PGP Pub. KeyID: 0xA4357E78 · LINK |
| |
| | | Thomas 'PointedEars' Lahn | |
| | Posted: Tue May 20, 2008 6:59 am Post subject: Re: Capturing scroll bar usage on textarea | |
Bjoern Hoehrmann wrote:
| Quote: | * konryd wrote in comp.lang.javascript:
I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
What is wrong with the 'scroll' event?
|
That it is proprietary.
| Quote: | An <textarea onscroll='...'
|
You of all people should know that this is invalid HTML.
| Quote: | certainly works for me in Internet Explorer,
|
I wonder how you of all people could even think about advocating
invalid HTML just to satisfy Internet Explorer users.
| Quote: | perhaps you missed this event?
|
Perhaps he was thinking more clearly than you do now.
PointedEars
--
Use any version of Microsoft Frontpage to create your site.
(This won't prevent people from viewing your source, but no one
will want to steal it.)
-- from <http://www.vortex-webdesign.com/help/hidesource.htm> |
| |
| | | Bjoern Hoehrmann | |
| | Posted: Tue May 20, 2008 8:21 am Post subject: Re: Capturing scroll bar usage on textarea | |
* Thomas 'PointedEars' Lahn wrote in comp.lang.javascript:
| Quote: | Bjoern Hoehrmann wrote:
* konryd wrote in comp.lang.javascript:
I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
What is wrong with the 'scroll' event?
That it is proprietary.
|
It's actually part of the HTML Events in DOM Level 2 Events. I indeed
neglected to mention that the onscroll attribute is not part of HTML4
and derived formats, thank you for adding that information.
--
Björn Höhrmann · mailto:bjoern@hoehrmann.de · LINK
Weinh. Str. 22 · Telefon: +49(0)621/4309674 · LINK
68309 Mannheim · PGP Pub. KeyID: 0xA4357E78 · LINK |
| |
| | | Thomas 'PointedEars' Lahn | |
| | Posted: Tue May 20, 2008 8:49 am Post subject: Re: Capturing scroll bar usage on textarea | |
| |  | |
Bjoern Hoehrmann wrote:
| Quote: | * Thomas 'PointedEars' Lahn wrote in comp.lang.javascript:
Bjoern Hoehrmann wrote:
* konryd wrote in comp.lang.javascript:
I want to know when a user scrolls the textarea. Since there is no
such an event, I need to scroll all the ways scrolling might be
invoked, that is:
What is wrong with the 'scroll' event?
That it is proprietary.
It's actually part of the HTML Events in DOM Level 2 Events.
|
Yes, indeed! Thank you for pointing this out.
| Quote: | I indeed neglected to mention that the onscroll attribute is not part of
HTML4 and derived formats,
|
However, since the `scroll' event is part of DOM Level 2 Events one can use
EventTarget::addEventListener() (except for MSHTML where assignment to
..onscroll would have to suffice due to buggy attachEvent()). Great :)
| Quote: | thank you for adding that information.
|
You are welcome.
PointedEars
--
realism: HTML 4.01 Strict
evangelism: XHTML 1.0 Strict
madness: XHTML 1.1 as application/xhtml+xml
-- Bjoern Hoehrmann |
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