Element: ariaSetSize property

Baseline 2023
Newly available

Since October 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The ariaSetSize property of the Element interface reflects the value of the aria-setsize attribute, which defines the number of items in the current set of listitems or treeitems.

Value

A string containing an integer.

Examples

In this example the aria-setsize attribute on the element with an ID of tab-id is set to "3", to inform a device that there are currently 3 tabs in the group. Using ariaSetSize we update the value to "4".

html
<button
  role="tab"
  aria-selected="true"
  aria-setsize="3"
  aria-controls="tabpanel-id"
  id="tab-id">
  Tab label
</button>
js
let el = document.getElementById("tab-id");
console.log(el.ariaSetSize); // 3
el.ariaSetSize = "4";
console.log(el.ariaSetSize); // 4

Specifications

Specification
Accessible Rich Internet Applications (WAI-ARIA)
# dom-ariamixin-ariasetsize

Browser compatibility

BCD tables only load in the browser

See also