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HTMLAnchorElement: protocol property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The protocol property of the HTMLAnchorElement interface is a string containing the protocol or scheme of the <a> 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.
js
// 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:'