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Re: Scope-Attribute necessary for TH-Element?

for

From: Wolfgang Berndorfer
Date: Jul 10, 2017 2:46PM

Thanks to all!
I distil the following guidelines out of your answers:
- A simple data table with correct col-headings in the first row does not
need the scope-attribute.
- The scope-attribute should be used for backwards compatibility, when there
are row-headings.
- If a <th> cell spans multiple rows/columns you need to use
scope="colgroup"/"rowgroup" along with the colspan/rowspan attribute.
- If the <th> cell is not the first row or column in the table you need the
scope attribute. [@Birkir: Have no idea, when this could be needed in a
sensefull context.]
- According to the HTML 5 spec scope is not valid on TD elements but it is
on TH elements.

@Jonathan:
I’m Austrian and try to learn a11y-Slang and therefore misunderstand and
missformulate sometimes. You wrote:
“Assistive technology support should generally be good but may need to be
checked for the technology stack you are trying to support.”
Isn’t AT support essential in any technology stack? What did I understand
wrong in Your formulation?

And what I learned about the a11y scene:
W3schools is often useful but not affiliated with the W3C. And when W3C
informations have to be reflected, this has to be noticed by W3C Children
and even more by self called W3C adoptees.

Thanks!
Wolfgang

Zweiter Blick - Für ein barrierefreies Web
Wolfgang Berndorfer
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-----Ursprüngliche Nachricht-----
Von: WebAIM-Forum [mailto: <EMAIL REMOVED> ] Im Auftrag
von Birkir R. Gunnarsson
Gesendet: Sonntag, 09. Juli 2017 21:09
An: WebAIM Discussion List
Betreff: Re: [WebAIM] Scope-Attribute necessary for TH-Element?

Jonathan described it well.
If your <th> cells span a single column and are in the first row
scope="col" is not needed.
Ditto <th> cells in first column spanning a single row, scope="row" is
generally not needed.

If a <th> cell spans multiple rows/columns you need to use
scope="colgroup"/"rowgroup" along with the colspan/rowspan attribute.
If the <th> cell is not the first row or column in the table you need
the scope attribute.



On 7/9/17, Jonathan Avila < <EMAIL REMOVED> > wrote:
>> But I read on w3scholls <https://www.w3schools.com/tags/att_td_scope.asp>
>> that the attribute is not supported in HTML5.
>
> According to the HTML 5 spec scope is not valid on TD elements but it is
on
> TH elements.
>
> FYI W3schools is not affiliated with the W3C.
>
> Technically when scope is not set it defaults to "auto" which sets the
> header cell to apply to cells in context.
>
> The general rule of thumb is that scope is likely not needed for column
> header cells in the first row of a table but would be needed in other
> situations where lack of scope would be ambiguous how the header is
scoped.
> Assistive technology support should generally be good but may need to be
> checked for the technology stack you are trying to support.
>
> Best Regards,
>
> Jonathan
>
> Jonathan Avila
> Chief Accessibility Officer
> Level Access, inc. (formerly SSB BART Group, inc.)
> (703) 637-8957
> <EMAIL REMOVED>
> Visit us online: Website | Twitter | Facebook | LinkedIn | Blog
> Looking to boost your accessibility knowledge? Check out our free
webinars!
>
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>
> -----Original Message-----
> From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On Behalf
> Of Wolfgang Berndorfer
> Sent: Sunday, July 9, 2017 12:47 PM
> To: 'WebAIM Discussion List' < <EMAIL REMOVED> >
> Subject: [WebAIM] Scope-Attribute necessary for TH-Element?
>
> Hi!
>
> Are scope-attributes still considered as necessary for <th>-elements in
data
> tables?
>
> webaim <http://webaim.org/techniques/tables/data#th>; says Yes. But I read
> on w3scholls <https://www.w3schools.com/tags/att_td_scope.asp> that the
> attribute is not supported in HTML5.
>
> And: I just tested a simple data table (with no nested headings for
columns
> or rows): Jaws 17 showed no information or navigation problems, when <th>
> was implemented correctly.
>
> Opinions?
>
> Wolfgang Berndorfer
>
> > at
> http://webaim.org/discussion/archives
> > > > > >


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