---
title: ElementInternals.ariaLevel
slug: Web/API/ElementInternals/ariaLevel
tags:
  - API
  - Property
  - Reference
  - ariaLevel
  - AriaAttributes
  - AriaMixin
  - ElementInternals
browser-compat: api.ElementInternals.ariaLevel
---
{{DefaultAPISidebar("DOM")}}

The **`ariaLevel`** property of the {{domxref("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](https://wicg.github.io/aom/explainer.html#default-semantics-for-custom-elements-via-the-elementinternals-object).

## Syntax

```js
let ariaLevel = ElementInternals.ariaLevel;
ElementInternals.ariaLevel = ariaLevel;
```

### Value

A {{domxref("DOMString")}} containing an integer.

## Examples

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

```js
this.internals_.ariaLevel = "1";
```

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}

## See also

- [ARIA: heading role](/en-US/docs/Web/Accessibility/ARIA/Roles/heading_role)
