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.

TheariaLevel property of theElementInternals interface reflects the value of thearia-level attribute, which defines the hierarchical level of an element within a structure.

Note:Setting aria attributes onElementInternals 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 theAccessibility Object Model explainer.

Value

A string containing an integer.

Examples

In this example the value ofariaLevel is set to "1".

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