WCAG Guideline 2.2:
Provide users enough time to read and use content.
2.2.1 Timing Adjustable (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 essential and extending it would invalidate the activity; OR
- 20 Hour Exception:
- The time limit is longer than 20 hours.
Reference:
2.2.2 Pause, Stop, Hide (Level A):
For moving, blinking, 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 pause, stop, or hide it unless the movement, blinking, or scrolling is part of an activity where it is essential; 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.
Reference:
2.2.3 No Timing: (Level AAA):
Timing is not an essential part of the event or activity presented by the content, except for non-interactive synchronized media and real-time events.
Reference:
2.2.4 Interruptions (Level AAA):
Interruptions can be postponed or suppressed by the user, except interruptions involving an emergency.
Reference:
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.