Copy Jira ticket identifier

script.js

// ==UserScript==
// @name         Copy Jira ticket identifier
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Concats the ticket number and title of a Jira ticket
// @author       mu88
// @match        https://<<Jira>>/browse/*
// @icon         https://<<Jira>>/s/<<Change>>/_/images/fav-generic.png
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var containingElement = document.getElementById('opsbar-jira.issue.tools');

    var clickElement = document.createElement('a');
    clickElement.onclick = click;
    clickElement.id = 'jira-copy-ticket-identifier';
    clickElement.href = '#';
    clickElement.classList.add('aui-button');
    clickElement.classList.add('toolbar-trigger');
    clickElement.innerText='Copy ticket identifier';

    containingElement.appendChild(clickElement);

    function click () {
        var ticketNumber = document.getElementById('key-val').innerText;
        var ticketTitle = document.getElementById('summary-val').innerText;
        var ticketUrl = window.location;
        var concatenatedIdentifier = ticketNumber + ': ' + ticketTitle;

        function listener(e) {
            e.clipboardData.setData("text/html", '<a href="' + ticketUrl + '">' + concatenatedIdentifier +'</a>');
            e.clipboardData.setData("text/plain", concatenatedIdentifier);
            e.preventDefault();
        }

        document.addEventListener("copy", listener);
        document.execCommand("copy");
        document.removeEventListener("copy", listener);
    }
})();