copy-url-on-hover/copylinkaddress.js

let popSoundUrl = chrome.runtime.getURL('sounds/pop.mp3');
let popSoundAudio = new Audio(popSoundUrl);

function getAbsoluteURL(url) {
    var link = document.createElement("a");
    link.href = url;
    return (link.protocol + "//" + link.host + link.pathname);
}

window.onkeydown = function(event) {
    var hoveredLink = $('a:hover');
    if (hoveredLink.length) {
        if (event.key == "x") {
            navigator.clipboard.writeText(hoveredLink.text())
        } else if (event.key == "y") {
            var hoveredHrefAttr = hoveredLink.attr('href');
            navigator.clipboard.writeText(getAbsoluteURL(hoveredHrefAttr));
        } else {
            return;
        }
        popSoundAudio.play();
    }
}