Valid attribute values (4.1.1.attribute-values)
Axe-core deprecated + obsolete
Attributes, such as value="example", are
properly formed with matching quotation marks.
Quotation marks missing:
This paragraph has aria-hidden="true",
without matching quotation marks.
(HTML auto-corrects this issue)
I like apples
Original source code of above paragraph has
aria-hidden=true
Note: HTML auto-corrects this issue.