If the page content contains parts that move, blink or scroll automatically for more than 5 seconds, provide a way to turn off the movement or blinking or scrolling, or to hide it., unless the appearance of motion is part of an essential activity. If the page contains auto-updating information, give the user a way to pause, hide, or control the auto updates.
Official Requirements:
2.2.2 Pause, Stop, Hide: For moving, blinking, scrolling, or auto-updating information, all of the following are true: (Level A)
- 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.
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.
How to fix:
- Provide a way to pause and restart animation.
- Provide a way to pause and restart auto-updating information.
- Create animation so that the motion stops by itself after 5 seconds.
- A "loading" animation can be considered essential if it doesn't run in parallel with other content--ie, it's the only content on the page, and is used to convey to the user that they need to wait until the content is fully loaded.
