2.2.2 Pause, Stop, Hide

What it is

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.

Check: 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
Check: 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.
Use the sufficient techniques below as acceptable methods when applicable.
Confirm none of the common failures apply.

G4: Allowing the content to be paused and restarted from where it was paused
SCR33: Using script to scroll content, and providing a mechanism to pause it
G11: Creating content that blinks for less than 5 seconds
G152: Setting animated gif images to stop blinking after n cycles (within 5 seconds)
SCR22: Using scripts to control blinking and stop it in five seconds or less
G186: Using a control in the web page that stops moving, blinking, or auto-updating content
G191: Providing a link, button, or other mechanism that reloads the page without any blinking content

F16: Failure of Success Criterion 2.2.2 due to including scrolling content where movement is not essential to the activity without also including a mechanism to pause and restart the content
F112: Failure of Success Criterion 2.2.2 due to using blinking content that lasts for more than five seconds without a mechanism to stop it
F50: Failure of Success Criterion 2.2.2 due to a script that causes a blink effect without a mechanism to stop the blinking at 5 seconds or less
F7: Failure of Success Criterion 2.2.2 due to an object or applet that has blinking content without a mechanism to pause the content that blinks for more than five seconds

Note 1: For requirements related to flickering or flashing content, refer to Guideline 2.3.
Note 2: Since any content that does not meet this success criterion can interfere with a user's ability to use the whole page, all content on the web page (whether it is used to meet other success criteria or not) must meet this success criterion. See Conformance Requirement 5: Non-Interference.
Note 3: 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 4: 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.