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https://rawgithub.com/whatwg/html-differences/master/Overview.html#new-attributes [[ The role and aria-* collection attributes which can be used to instruct assistive technology. ]] there are different implementation and author requirements between w3c and whatwg in the aria section
https://github.com/whatwg/html-differences/commit/67c16829accbb4b6a2870bccbf955e114f520b85