It's an attribute designed to help assistive technology (e.g. screen readers) attach a label to an otherwise anonymous HTML element. ... <看更多>

In addition to providing the **ariaLabelledby** property, you should also use a **label** element to indicate a label for previous versions of the browser. ... <看更多>

Regarding: https://w3c.github.io/aria-practices/#naming_with_aria-labelledby: "It incorporates content from elements regardless of their ... ... <看更多>