Greasemonkey script for linking from new to old jira tracker

greasemonkey-ibexa-atlassian-net.user.js

// ==UserScript==
// @name         Link from new Jira cloud to old Jira
// @namespace    https://gist.github.com/vidarl/633e2a8dfe055fd4a0d61e46ebc1c267
// @version      1.0
// @description  Add a link to the corresponding issues.ibexa.co ticket page
// @match        https://ibexa.atlassian.net/*
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    // Match /browse/some_string-some_number
    const match = window.location.pathname.match(/^\/browse\/([a-zA-Z0-9_-]+-\d+)$/);
    if (!match) return;

    const browseId = match[1];
    const targetUrl = `https://issues.ibexa.co/browse/${browseId}`;

    // Find header and nav
    const header = document.querySelector('header');
    if (!header) return;

    const nav = header.querySelector(':scope > nav');
    if (!nav) return;

    // Prevent duplicate insertion
    if (header.querySelector('.issues-link-container')) return;

    // Create container div
    const container = document.createElement('div');
    container.className = 'issues-link-container';

    // Create link
    const link = document.createElement('a');
    link.href = targetUrl;
    link.textContent = 'View on issues.ibexa.co';
    link.target = '_blank';
    link.rel = 'noopener noreferrer';

    // Optional styling
    link.style.display = 'inline-block';
    link.style.padding = '0.5em';

    container.appendChild(link);

    // Insert just before <nav>
    header.insertBefore(container, nav);
})();