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WCAG 2.0 Success Criteria for Important Messages

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From: Brian Lovely
Date: Jun 17, 2015 11:26AM

We have important messages that may appear on our pages. They are HTML elements styled to catch the attention of the visually oriented user, not window alerts. In recommending that we expose these alert messages to assistive technology, I am asked to refer to the pertinent level A and/or level AA success critera (for instance, 1.1.1 Non-text Content [Level A]). What success criteria should I cite for this? Some of these alerts will be there on page load (for instance, if a user's account is overdrawn), and some will appear based on user actions (for instance, if they attempt to make a payment from a locked account).

Brian Lovely
<EMAIL REMOVED>