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Re: [csswg-drafts] [css-images] Disabling image animation

From: Dan Harkless via GitHub <sysbot+gh@w3.org>
Date: Sat, 07 Oct 2017 14:10:06 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-334937655-1507385391-sysbot+gh@w3.org>
Simon, thank you very much for opening this issue.  I think it's much more than a "nice to have", though. The Web Content Accessibility Guidelines require that users be given the ability to pause, stop, or hide any animation that starts automatically and lasts more than 5 seconds (e.g. looping animated GIFs and PNGs).  This is as it should be, since, for example, users with hypervigilance (little to no ability to employ selective attention) are unable to "just ignore" or "tune out" distracting extraneous animations in the field of view.

Firefox (and previously Netscape), for example, originally had the ability to stop animated GIFs by pressing the Stop button or hitting the Esc key.  Then this ability was eliminated as a side effect of fixing an XMLHttpRequest bug, and now browser add-ons must be installed in order to restore it.  Unfortunately these add-ons utilize browser hooks that will no longer be available when Firefox support for add-ons other than WebExtensions is eliminated in November 2017.

Currently, WebExtensions have no ability to stop image animations, so it seems that a CSS property is required to allow browsers like Firefox to meet this aspect of the W3C accessibility guidelines.

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GitHub Notification of comment by DanHarkless
Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1615#issuecomment-334937655 using your GitHub account
Received on Saturday, 7 October 2017 14:09:57 UTC

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