The ariaReadOnly property of the Element interface reflects the value of the aria-readonly attribute, which indicates that the element is not editable, but is otherwise operable.

A string with one of the following values:

"true"

The user cannot change the value of the element.

"false"

The user can set the value of the element.

In this example the aria-readonly attribute on the element with an ID of txtBoxInput is set to "true" indicating that this input is currently read only. Using ariaReadOnly we update the value to "false".

<div id="txtboxMultilineLabel">Enter the tags for the article</div>
<div
  role="textbox"
  id="txtBoxInput"
  contenteditable="true"
  aria-multiline="true"
  aria-labelledby="txtboxMultilineLabel"
  aria-readonly="true"></div>

let el = document.getElementById("txtBoxInput");
console.log(el.ariaReadOnly); // "true"
el.ariaReadOnly = "false";
console.log(el.ariaReadOnly); // "false"

• ARIA: textbox role