- From: Phill Jenkins <pjenkins@us.ibm.com>
- Date: Tue, 7 Dec 2021 12:47:34 -0500
- To: w3c-wai-ig <w3c-wai-ig@w3.org>
- Message-ID: <OF6E5DB571.84A549A0-ON002587A4.005E76B1-862587A4.0061BD51@ibm.com>
Referring to WCAG 2.1
Success Criterion 2.2.2 Pause, Stop, Hide (Level A)
https://www.w3.org/TR/WCAG21/#pause-stop-hide
where it describes auto-updating:
Auto-updating: For any auto-updating information that (1) starts
automatically and (2) is presented in parallel with other content,
there is a mechanism for the user to pause, stop, or hide it or to
control the frequency of the update unless the auto-updating is part of
an activity where it is essential.
It uses the term *ANY*, as in "For any auto-updating information ...".
1. So does this apply to a graph or data table that is auto-updated by
software every hour?
2. Does it apply if it is auto-updated every 10 mins, giving the user time
to read the graph or data table?
3. Does it apply to **any and all** auto-update data and content (except
the essential exceptions)?
There is a sufficient technique, but not a success criteria, that has a
good example:
G186: Using a control in the Web page that stops moving, blinking,
or auto-updating content
Example 2: Teleconferencing Tool
A teleconferencing Web page displays a speaker queue of people who
wish to speak. A checkbox on the page lets the user choose whether
the display of the queue should be updated automatically when a new
person is added or removed, or whether it should only be updated when
the user presses the "Refresh" button. When the queue is being
updated automatically, the Refresh button is deactivated.
Some additional questions I have:
So what is the frequency definition of "auto-update" and/or "animation"?
(neither term is in the glossary)
Blinking is defined, but when does 2.2.2 become applicable? At what
auto-update frequency does there need to be a way for the user to pause,
stop, or hide? How is animation and auto-update defined such that 2.2.2
becomes applicable?
Could we apply the 20 hour rule for time limits to auto-updates? Such
that 2.2.2 doesn't apply to content and data that is upated every 20
hours or more?
Could we apply the 20 second rule for the user is to be warned before
the auto-update occurs? If warned, do they still needs to be given at
least 20 seconds to pause or stop the auto-update?
___________
Regards,
Phill Jenkins
See the new IBM Equal Access toolkit and accessibility checker at
www.ibm.com/able
linkedin.com/in/philljenkins/
www.ibm.com/able
ageandability.com
Received on Tuesday, 7 December 2021 17:47:56 UTC