Timed Activities


Web pages with a fixed time limit do not give all users enough time to interact with the web content on a page. Some examples of timed activities include reading text that is moving or scrolling (for example, slideshows), completing a timed test, filling out a form before the session time limit runs out, or being redirected to a new page.

How to Fix

For each time limit on the page, at least one of the following must be true:

  • Users can turn off the time limit before encountering it; or
  • Users can adjust the time limit to at least 10 times the length of the default setting before encountering the time limit; or
  • Users are 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"). Users are allowed to extend the time limit at least 10 times.

The only exceptions would be if:

  • 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 
  • The time limit is essential and extending it would invalidate the activity; or
  • The time limit is longer than 20 hours.

Tips for Time Limits

Things to Avoid

  • Do not use timed redirects to automatically redirect users to a new page. Redirects should be instant.

External Resources

  1. Understanding Success Criterion 2.2.1 Timing Adjustable (Level A)
  2. Understanding Success Criterion 2.3.1 Three Flashes or Below Threshold (Level A)