ElementInternals: ariaColIndex 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 ariaColIndex property of the ElementInternals interface reflects the value of the aria-colindex attribute, which defines an element's column index or position with respect to the total number of columns within a table, grid, or treegrid.

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 which contains an integer.

Examples

In this example the value of ariaColIndex is set to "2".

class CustomControl extends HTMLElement {
 constructor() {
 super();
 this.internals_ = this.attachInternals();
 this.internals_.ariaColIndex = "2";
 }
 // ...
}