Identifies the element that provides a detailed, extended description for the object.
Description
New in ARIA 1.1

Identifies the element that provides a detailed, extended description for the object. See related aria-describedby.

The aria-details attribute references a single element that provides more detailed information than would normally be provided by aria-describedby. It enables assistive technologies to make users aware of the availability of an extended description as well as navigate to it. Authors SHOULD ensure the element referenced by aria-details is visible to all users.

Unlike elements referenced by aria-describedby, the element referenced by aria-details is not used in either the Accessible Name Computation or the Accessible Description Computation as defined in the Accessible Name and Description specification [accname-aam-1.1]. Thus, the content of an element referenced by aria-details is not flattened to a string when presented to assistive technology users. This makes aria-details particularly useful when converting the information to a string would cause a loss of information or make the extended description more difficult to understand.

In some user agents, multiple reference relationships for descriptive information are not supported by the accessibility API. In such cases, if both aria-describedby and aria-details are provided on an element, aria-details takes precedence.

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