Add back link to network graph in github project nav

guthub-network.userscript.js

// ==UserScript==
// @name         github network link
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  add back link to network graph on github
// @author       MightyPork
// @match        https://github.com/*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function addNetworkButton() {
        const rn = document.querySelector('.reponav');
        const oldbutt = rn.querySelector('.nwk-butt');
        if(oldbutt) rn.removeChild(oldbutt);

        if (rn) {
            const butt = document.createElement('a');
            butt.href = location.href.replace(/(https:\/\/github.com\/[^/]+\/[^/]+).*/, "$1/network");
            butt.innerHTML = '<svg class="octicon octicon-git-branch" height="16" version="1.1" viewBox="0 0 14 16" width="14" aria-hidden="true"><path fill-rule="evenodd" d="M10 5c0-1.11-.89-2-2-2a1.993 1.993 0 0 0-1 3.72v.3c-.02.52-.23.98-.63 1.38-.4.4-.86.61-1.38.63-.83.02-1.48.16-2 .45V4.72a1.993 1.993 0 0 0-1-3.72C.88 1 0 1.89 0 3a2 2 0 0 0 1 1.72v6.56c-.59.35-1 .99-1 1.72 0 1.11.89 2 2 2 1.11 0 2-.89 2-2 0-.53-.2-1-.53-1.36.09-.06.48-.41.59-.47.25-.11.56-.17.94-.17 1.05-.05 1.95-.45 2.75-1.25S8.95 7.77 9 6.73h-.02C9.59 6.37 10 5.73 10 5zM2 1.8c.66 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2C1.35 4.2.8 3.65.8 3c0-.65.55-1.2 1.2-1.2zm0 12.41c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2zm6-8c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2z"></path></svg> Network';
            butt.className = "js-selected-navigation-item reponav-item nwk-butt";
            rn.appendChild(butt);
        }
    }

    addNetworkButton();

    document.querySelector('head').addEventListener('DOMNodeRemoved', function() {
        addNetworkButton();
    });
})();