Using JavaScript, it is possible to dynamically change parts of a page without requiring the entire page to reload — for instance, to update a list of search results on the fly, or to display a discreet alert or notification which does not require user interaction. While these changes are usually visually apparent to users who can see the page, they may not be obvious to users of assistive technologies. ARIA live regions fill this gap and provide a way to programmatically expose dynamic con...| MDN Web Docs
1 Language Power and Information Reuse| www.w3.org
86% of the top 100,000 websites use it, but what’s the cost to users?| Iain Bean
The WebAIM Million| webaim.org