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UI toasts, notifications and conforming to time limits (2.2.1)

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From: Matt Gregg
Date: Jul 11, 2018 9:34AM

Many design systems for web applications (e.g., Google's Material, Salesforce Lightning, IBM's Carbon) include UI components such as toasts or notifications that are configured to disappear after a period of time (typically 3-10 second range). My interpretation of success criteria 2.2.1 would be that these would fail and thus wouldn't conform to WCAG 2.0 in use. The content of the message could disappear before someone could read it for a variety of circumstances. 

https://www.linkedin.com/redir/redirect?url=https://www.w3.org/TR/UNDERSTANDING-WCAG20/time-limits-required-behaviors.html&urlhash=qEiL&_t=tracking_anet

A similar topic had been discussed previously in a list thread https://webaim.org/discussion/mail_thread?thread„68
It lists out some criteria for toasts which includes having them disappear after a time duration as well.

I'm wondering if there is some other interpretation or way to consider this success criteria that I'm missing where these disappearing messages would conform and be highly accessible to the all users? Or, is this scenario not covered by this success criteria for some reason? 

We're working on a design system and have been discussing if we should include this capability for these type of components to disappear after a time period or only support a user having to dismiss them explicitly. 

Thanks,
Matt




Matt Gregg
Manager, User Experience

Blackbaud, Inc.
2000 Daniel Island Drive, Charleston, SC 29492
Phone: 843.654.2979
<EMAIL REMOVED> | blackbaud.com <http://www.blackbaud.com>;