The ariaHasPopup property of the Element interface reflects the value of the aria-haspopup attribute, which indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.

A string with one of the following values:

"false"

The element does not have a popup.

"true"

The element has a popup that is a menu.

"menu"

The element has a popup that is a menu.

"listbox"

The element has a popup that is a listbox.

"tree"

The element has a popup that is a tree.

"grid"

The element has a popup that is a grid.

"dialog"

The element has a popup that is a dialog.

In this example, the aria-haspopup attribute on the element with an ID of animal is set to "true". Using ariaHasPopup, we update the value to "listbox", which is the expected value for a combobox that invokes a listbox popup.

<div class="animals-combobox">
  <label for="animal">Animal</label>
  <input
    id="animal"
    type="text"
    role="combobox"
    aria-autocomplete="list"
    aria-controls="animals-listbox"
    aria-activedescendant=""
    aria-expanded="false"
    aria-haspopup="true" />
  <ul id="animals-listbox" role="listbox" aria-label="Animals">
    <li id="animal-cat" role="option">Cat</li>
    <li id="animal-dog" role="option">Dog</li>
  </ul>
</div>

let el = document.getElementById("animal");
console.log(el.ariaHasPopup); // true
el.ariaHasPopup = "listbox";
console.log(el.ariaHasPopup); // listbox