aria-describedby property to provide a descriptive label for user interface controlsTechnologies that support Accessible Rich Internet Applications (WAI-ARIA).
The purpose of this technique is to demonstrate how to use the WAI-ARIA aria-describedby property to provide programmatically determined, descriptive information about a user interface element. The aria-describedby property may be used to attach descriptive information to one or more elements through the use of an id reference list. The id reference list contains one or more unique element ids.
Refer to ARIA in HTML for information on how to provide WAI-ARIA States and Properties with HTML. WAI-ARIA States and Properties are compatible with other languages as well; refer to documentation in those languages.
The aria-describedby property is not designed to reference descriptions on an external resource - since it is an id, it must reference an element in the same DOM document.
aria-describedby to associate instructions with form fieldsSample form field using aria-describedby to associate instructions with form fields while there is a form label.
<form>
<label for="fname">First name</label>
<input aria-describedby="int2" autocomplete="given-name" id="fname" type="text">
<p id="int2">Your first name is sometimes called your "given name".</p>
</form>aria-describedby property to provide more detailed information about the button<div>
<span id="fontDesc">Select the font faces and sizes to be used on this page</span>
<button aria-describedby="fontDesc" id="fontB" type="button">Fonts</button>
</div>
<div>
<span id="colorDesc">Select the colors to be used on this page</span>
<button aria-describedby="colorDesc" id="colorB" type="button">Colors</button>
</div>
<div>
<span id="customDesc">Customize the layout and styles used on this page</span>
<button aria-describedby="customDesc" id="customB" type="button">Customize</button>
</div>aria-describedby attribute that references one or more elements via unique id.