The HTMLAreaElement.href property is a stringifier that returns a string containing the whole URL, and allows the href to be updated.
A string.
// An <area id="myArea" href="https://developer.mozilla.org/en-US/HTMLAreaElement"> element is in the document
const area = document.getElementById("myArea");
area.href; // returns 'https://developer.mozilla.org/en-US/HTMLAreaElement'HTMLAreaElement interface it belongs to.