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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/Element/ariaRoleDescription below:

Element: ariaRoleDescription property - Web APIs

Baseline 2023

Newly available

The ariaRoleDescription property of the Element interface reflects the value of the aria-roledescription attribute, which defines a human-readable, author-localized description for the role of an element.

A string.

In this example the aria-roledescription attribute on the element with an ID of myApplication has been set. Using ariaRoleDescription we can update the value.

<div
  id="myApplication"
  role="application"
  aria-roledescription="a description of this widget">
  …
</div>

let el = document.getElementById("myApplication");
console.log(el.ariaRoleDescription); // "a description of this widget"
el.ariaRoleDescription = "an updated description of this widget";
console.log(el.ariaRoleDescription); // "an updated description of this widget"

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