Is presence of aria-hidden sufficient or is value set to “true” required (aria-hidden=“true”)

Question

The html \"hidden\" attribute is a boolean and does NOT need a value set. It\'s mere presence is sufficient.

What about the \"aria-hidden\" attribute? Is it\'s mere p

Answer 1

aria-hidden must have a value of true|false. Note, however, that aria-hidden is not needed if you are using the hidden attribute or if you are using CSS visibility:none or display:hidden. All three of these latter three ways to hide will also hide the element from a screen reader. You only need aria-hidden="true" if there's something on the display that you want to hide from a screen reader, such as a decorative element that does not add meaning to the page.

If you are "hiding" an object by setting its font size to 0 or using a clipping rectangle or "pushing" the element off the screen with x or y, then you will need to set aria-hidden="true" on that element because the former techniques are only visually hiding the element and not truly hiding the element.

Answer 2

You must supply a value for aria-hidden.

"If an element is only visible after some user action, authors MUST set the aria-hidden attribute to true. When the element is presented, authors MUST set the aria-hidden attribute to false or remove the attribute, indicating that the element is visible."

https://www.w3.org/WAI/PF/aria/states_and_properties#aria-hidden