Return to list of success criteria
2.2.1 For each time limit that is set by the content, at least one of the following is true: (Level A)Understanding Success Criterion 2.2.1
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.
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 Success Criterion 3.2.1, which puts limits on changes of content or context as a result of user action.
Note: Other techniques may also be sufficient if they meet the success criterion.
G198: Providing a way for the user to turn the time limit off
G180: Providing the user with a means to set the time limit to 10 times the default time limit
SCR16: Providing a script that warns the user a time limit is about to expire (Scripting) AND SCR1: Allowing the user to extend the default time limit (Scripting)
FLASH24: Allowing the user to extend the default time limit (Flash)
SL21: Replacing A Silverlight Timed Animation With a Nonanimated Element (Silverlight)
Using a script to poll the server and notify a user if a time limit is present (future link) (Scripting)
Using sounds to focus user's attention (future link)