copy.js

/* タイトルと URL コピーするやつ */

!function (document) {
    var text = prompt("コメント:");
    if (text == null) {
        return;
    }
    text = text === "" ? "" : text + "\n\n";
    var body = document.body;
    var element = document.createElement("textarea");
    element.textContent = text + document.title + " - " + location.href;
    body.appendChild(element);
    element.select();
    document.execCommand("copy");
    body.removeChild(element);
}(document);