pause-stop-hide.html

<section id="pause-stop-hide" class="sc">
   <h4>Pause, Stop, Hide</h4>

   <p class="conformance-level">A</p>

   <p>For moving, <a>blinking</a>, scrolling, or auto-updating content, all of the following are true:</p>

   <dl>
      <dt>Moving, blinking, scrolling</dt>
      <dd>
         <p>For any moving, blinking or scrolling content that (1) starts automatically, (2)
            lasts more than five seconds, and (3) is presented in parallel with other content,
            there is a <a>mechanism</a> for the user to <a>pause</a>, stop, or hide it unless the movement, blinking, or scrolling is part of an activity
            where it is <a>essential</a>; and</p>
      </dd>
      <dt>Auto-updating</dt>
      <dd>
         <p>For any auto-updating content 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.</p>
      </dd>
   </dl>

   <p class="note">For requirements related to flickering or flashing content, refer to <a href="#seizures-and-physical-reactions">Guideline 2.3</a>.</p>
   
   <p class="note">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 <a href="#cc5">Conformance Requirement 5: Non-Interference</a>.</p>
   
   <p class="note">When auto-updating content is paused, it is not required
      for any of the updates that happened while the content was paused to be presented
      to the user once the content is un-paused again – as this may not be technically
      possible, and in many situations could be confusing or misleading.</p>
   
   <p class="note">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 is frozen or broken.</p>
</section>