Greasemonkey script for GitHub pull requests and issues. Adds icon after title which, if clicked, copies the markup for a link to the PR to the clipboard

GitHub - click to copy link to PR or issue

// ==UserScript==
// @name         GitHub PR – click to copy link
// @version      0.1
// @description  Adds a "copy" link to the title of GitHub PR or issue. On clicking on it, copies link with title in text form to clipboard.
// @author       andfinally
// @match      	 https://github.com/*/pull/*
// @match        https://github.com/*/issues/*
// @icon         https://www.google.com/s2/favicons?domain=github.com
// @grant        none
// ==/UserScript==

'use strict';

if (document.readyState === 'loading') {
	document.addEventListener('DOMContentLoaded', afterDOMLoaded);
} else {
	afterDOMLoaded();
}

function afterDOMLoaded() {
	// Get PR title and URL
	const metaTag = document.querySelector("meta[property='og:url']");

	if (!metaTag) {
		return;
	}

	const url = metaTag.getAttribute('content');
	const h1 = document.querySelector('h1.gh-header-title');

	if (!h1) {
		return;
	}

	const title = h1.querySelector('.js-issue-title').textContent;

	// Add div to copy linked title
	const div = document.createElement('div');
	div.style.display = 'inline-block';
	div.style.color = 'rgb(139, 148, 158)';
	div.style.cursor = 'copy';
	div.style.width = '32px';
	div.style.height = '32px';
	div.style.fontSize = '32px';
	div.innerText = '⎘';

	const blob = new Blob(['<a href="' + url + '">' + title + '</a>'], { type: 'text/plain' });
	const clipboardData = [new window.ClipboardItem({ ['text/plain']: blob })];

	// Add event listener to save productId in clipboard
	div.addEventListener('click', () => {
		navigator.clipboard.write(clipboardData);
	});

	h1.insertAdjacentElement('beforeend', div);
}