The hash property of the HTMLAnchorElement interface is a string containing a "#" followed by the fragment identifier of the <a> 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
<a id="myAnchor" href="/en-US/docs/Web/API/HTMLAnchorElement/hash#examples">
Examples
</a>you can get the hash of the anchor like this:
const anchor = document.getElementById("myAnchor");
anchor.hash; // '#examples'HTMLAnchorElement interface it belongs to.