The hash property of the HTMLAreaElement interface is a string containing a "#" followed by the fragment identifier of the <area> element's href. If the URL does not have a fragment identifier, this property contains an empty string, "".
See URL.hash for more information.
A string.
Given this HTML
<map name="infographic">
<area
id="mdn-circle"
shape="circle"
coords="130,136,60"
href="https://developer.mozilla.org/#ExampleSection"
alt="MDN" />
</map>
<img
usemap="#infographic"
src="/media/examples/mdn-info.png"
alt="MDN infographic" />you can get the hash of the area link like this:
const area = document.getElementById("mdn-circle");
area.hash; // '#ExampleSection'HTMLAreaElement interface it belongs to.