2.2.1: Timing Adjustable [A]
Description
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 essential and extending it would invalidate the activity; or
- 20 Hour Exception
-
The time limit is longer than 20 hours.
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 Success Criterion 3.2.1, which puts limits on changes of content or context as a result of user action.
Sufficient Techniques
Sufficient Techniques for Success Criterion 2.2.1
Note: Other techniques may also be sufficient if they meet the success criterion. See Understanding Techniques.
Situation A: If there are session time limits:
Situation B: If a time limit is controlled by a script on the page:
Situation C: If there are time limits on reading:
- G4: Allowing the content to be paused and restarted from where it was paused
- G198: Providing a way for the user to turn the time limit off
- SCR33: Using script to scroll content, and providing a mechanism to pause it
- SCR36: Providing a mechanism to allow users to display moving, scrolling, or auto-updating text in a static window or area