W3cubDocs

/Web APIs

ElementInternals: ariaExpanded property

The ariaExpanded property of the ElementInternals interface reflects the value of the aria-expanded attribute, which indicates whether a grouping element owned or controlled by this element is expanded or collapsed.

Note: Setting aria attributes on ElementInternals allows default semantics to be defined on a custom element. These may be overwritten by author-defined attributes, but ensure that default semantics are retained should the author delete those attributes, or fail to add them at all. For more information see the Accessibility Object Model explainer.

Value

A string with one of the following values:

"true"

The grouping element this element owns or controls is expanded.

"false"

The grouping element this element owns or controls is collapsed.

"undefined"

The element does not own or control a grouping element that is expandable.

Examples

In this example the value of ariaExpanded is set to "true".

js

this.internals_.ariaExpanded = "true";

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ariaExpanded 81 81 119 No 68 16.4 81 81 119 58 16.4 13.0

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/ariaExpanded