- From: Jeanne Spellman <jeanne@w3.org>
- Date: Thu, 28 Jun 2012 12:44:11 -0400
- To: UAWG <w3c-wai-ua@w3.org>
ACTION-518: Combine 2.11.2-4 (auto and executable content) into 1 sc with IER Proposed 2.11.2 Control of Autoplay: The user controls the autoplay of time-based media such that all the following are true: * the user can override autoplay on load * a placeholder provided by either the author or the user agent is displayed to the user * the user can toggle play function for the media. IER: Users who need to avoid signals that may trigger seizures, users who are easily distracted, and users who have difficulty interacting with the controls provided for playing media need to be able to load media in a paused state by default. The user agent provides a global control that sets a state equivalent to "paused waiting for user interaction" for all recognized media when a page loads. As an opt-in user setting, autoplay for media is off/paused, until the user activates 'play'. The user agent provides a visual or auditory (as appropriate) indicator that the video is in paused state and needs user interaction to start. This prevents media from playing without explicit request from the user. Note: Some web applications and document may be essentially empty until scripts are run. However, it is still important for users to have this level of control. There may times when media doesn't have a native control in the page. That is, the media is not in the actual document, but rather has simply been created with document.createElement('audio'). Here, the user agent does not recognize that the media exists. The user agent cannot give a visual indication by default, as it wouldn't be clear where that indication should appear in the page. At that stage, it will be up to the author to provide the controls See WCAG in resources below. Examples: Evan is blind. He sets the option in his browser so that when a web page loads it does not automatically run an executable object, so that any or music or speech they play won't interfere with his ability to hear his screen reader. When he is ready to start it playing he navigates to the placeholder and presses the Enter key to activate it. Jane has difficulty concentrating. In order to concentrate on the text of a document she wants to prevent any animations, media, or dynamic content from executing until she is ready. She clicks on the placeholder image when she wants to start the content. She can pause the content when she wants to go back to reading the text.
Received on Thursday, 28 June 2012 16:44:14 UTC