The protocol property of the Location interface is a string containing the protocol or scheme of the location's URL, 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.
// Let's an <a id="myAnchor" href="https://developer.mozilla.org/en-US/Location.protocol"> element be in the document
const anchor = document.getElementById("myAnchor");
const result = anchor.protocol; // Returns:'https:'