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ElementInternals: ariaLevel 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 ariaLevel property of the ElementInternals interface reflects the value of the aria-level attribute, which defines the hierarchical level of an element within a structure.

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 containing an integer.

Examples

In this example the value of ariaLevel is set to "1".

class CustomEl extends HTMLElement {
  constructor() {
    super();
    this.internals_ = this.attachInternals();
    this.internals_.ariaLevel = "1";
  }
  // …
}

Specifications

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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
ariaLevel 81 81 119 68 16.4 81 119 58 16.4 13.0 81 16.4

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/ariaLevel