The ariaValueText property of the Element interface reflects the value of the aria-valuetext attribute, which defines the human-readable text alternative of aria-valuenow for a range widget.

A string.

In this example the aria-valuetext attribute on the element with an ID of slider is set to "Sunday" to give a human-readable value for the range. Using ariaValueText we update the value to "Monday".

<div
  id="slider"
  role="slider"
  aria-valuenow="1"
  aria-valuemin="1"
  aria-valuemax="7"
  aria-valuetext="Sunday"></div>

let el = document.getElementById("slider");
console.log(el.ariaValueText); // Sunday
el.ariaValueText = "Monday";
console.log(el.ariaValueText); // Monday