Invalid aria-describedby on image

How to Fix the Problem

The aria-describedby attribute should associate an image with its text description, via the id attribute on the element where the text to be used as the description is found.

The Algorithm, in Simple Terms

Find <img>,<role=img> elements using an aria-describedby attribute where one of the following apply:

• at least one of the id references does not refer to any element in the document.
• one of the referred elements does not contain any text

Why Is it Important?

The aria-describedby attribute provides additional information to help AT users understand complex images.