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Re: Javascript and WCAG 2.0

for

From: Jonathan Avila
Date: Jul 15, 2014 7:16AM

> In addition, I explained that functionality provided by the use of
JavaScript does not have to exist when JavaScript is disabled or not
available, as long as the content is still available

Javascript can be relied upon without support for a non-Javascript
alternative if the use of it is accessibility supported and meets the
other conformance requirements of WCAG.

The point that may be confusing is the non-relied up on technologies under
the non-interference conformance requirement. For example, if the site
does not rely upon Javascript then turning off Javascript must still allow
the page to conform.

See understanding conformance requirement #5
(http://www.w3.org/TR/UNDERSTANDING-WCAG20/conformance.html)
* when any technology that is not relied upon is turned on in a user
agent,
* when any technology that is not relied upon is turned off in a user
agent, and
* when any technology that is not relied upon is not supported by a user
agent

So for example, unless the site is conformant without Javascript you'd
need to claim use of Javascript as a relied upon technology.

Jonathan

-----Original Message-----
From: <EMAIL REMOVED>
[mailto: <EMAIL REMOVED> ] On Behalf Of Liko, Todd
Sent: Tuesday, July 15, 2014 9:03 AM
To: ' <EMAIL REMOVED> '
Subject: [WebAIM] Javascript and WCAG 2.0

Hello all.

Could I please get some feedback on the use of Javascript and compliance
with WCAG 2.0?

I had a meeting with developers about the use of JavaScript . I explained
that JavaScript is an accessible technology and can be used if used in an
accessible way. In addition, I explained that functionality provided by
the use of JavaScript does not have to exist when JavaScript is disabled
or not available, as long as the content is still available. There was
some argument on this point, particularly about the content being
available. I said that if content becomes or remains hidden when
JavaScript is disabled or not available that this is considered a failure.

One of the developers said they could optionally post a conformance
statement on their application indicating what technologies are required
to use the application.

I have read conformance requirements 4 and 5 under Understanding
Conformance
Requirements<http://www.w3.org/TR/UNDERSTANDING-WCAG20/conformance.html>;
and the definition for Understanding Accessibility
Support<http://www.w3.org/TR/UNDERSTANDING-WCAG20/conformance.html#uc-acce
ssibility-support-head> in WCAG 2.0 and do not see this.

Any thoughts on this?

Thanks in advance.


_______

Todd Liko

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