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These tutorials have html examples.
'How to Use ARIA Effectively with HTML5,' https://www.sitepoint.com/how-to-use-aria-effectively-with-html5/
'Getting started with ARIA,' https://www.a11yproject.com/posts/2014-05-15-getting-started-aria/
'Background: An in-depth guide to ARIA roles,' https://www.a11yproject.com/posts/2020-08-20-an-indepth-guide-to-aria-roles/ .
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