The protocol property of the HTMLAnchorElement interface is a string containing the protocol or scheme of the <area> element's href, including the final ":".
This property can be set to change the protocol of the URL. A ":" is appended to the provided string if not provided. The provided scheme has to be compatible with the rest of the URL to be considered valid.
See URL.protocol for more information.
A string.
// An <a id="myAnchor" href="https://developer.mozilla.org/en-US/HTMLAnchorElement"> element is in the document
const anchor = document.getElementById("myAnchor");
anchor.protocol; // returns 'https:'HTMLAnchorElement interface it belongs to.