Provide users enough time to read and use content.
Success Criterion 2.2.1 Timing Adjustable
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(Level A)
For each time limit that is set by the content, at least one of the following is true:
Turn off
The user is allowed to turn off the time limit before encountering it; or
Adjust
The user is allowed to adjust the time limit before encountering it over a wide range that is at least ten times the length of the default setting; or
Extend
The user is warned before time expires and given at least 20 seconds to extend the time limit with a simple action (for example, "press the space bar"), and the user is allowed to extend the time limit at least ten times; or
Real-time Exception
The time limit is a required part of a real-time event (for example, an auction), and no alternative to the time limit is possible; or
Essential Exception
The time limit is and extending it would invalidate the activity; or
20 Hour Exception
The time limit is longer than 20 hours.
Note
This success criterion helps ensure that users can complete tasks without unexpected changes in content or context that are a result of a time limit. This success criterion should be considered in conjunction with , which puts limits on changes of content or context as a result of user action.
Success Criterion 2.2.2 Pause, Stop, Hide
(Level A)
For moving, , scrolling, or auto-updating information, all of the following are true:
Moving, blinking, scrolling
For any moving, blinking or scrolling information that (1) starts automatically, (2) lasts more than five seconds, and (3) is presented in parallel with other content, there is a mechanism for the user to , stop, or hide it unless the movement, blinking, or scrolling is part of an activity where it is ; and
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.
Note
Content that is updated periodically by software or that is streamed to the user agent is not required to preserve or present information that is generated or received between the initiation of the pause and resuming presentation, as this may not be technically possible, and in many situations could be misleading to do so.
Note
An animation that occurs as part of a preload phase or similar situation can be considered essential if interaction cannot occur during that phase for all users and if not indicating progress could confuse users or cause them to think that content was frozen or broken.
Success Criterion 2.2.3 No Timing
(Level AAA)
Timing is not an part of the event or activity presented by the content, except for non-interactive and .
Success Criterion 2.2.4 Interruptions
(Level AAA)
Interruptions can be postponed or suppressed by the user, except interruptions involving an .
Success Criterion 2.2.5 Re-authenticating
(Level AAA)
When an authenticated session expires, the user can continue the activity without loss of data after re-authenticating.
Success Criterion 2.2.6 Timeouts
(Level AAA)
Users are warned of the duration of any that could cause data loss, unless the data is preserved for more than 20 hours when the user does not take any actions.
