A userscript for adding link rel='next' to the head of the perl.org NNTP browser

link-rel-next-userscript.js

// ==UserScript==
// @name         Add link rel=next for "Thread Next" links
// @namespace    https://github.com/ernstki
// @version      2024-11-13
// @description  For use with https://gitlab.com/arty.name/firefox-extension-find-next-page or similar
// @author       Kevin Ernst (ernstki -at- mail.uc.edu)
// @match        https://www.nntp.perl.org/*
// @icon         https://icons.duckduckgo.com/ip4/perl.org.ico
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var link, head, haveLinkRel = false;
    Array.prototype.forEach.call(document.getElementsByTagName('a'), e => {
        if (e.textContent == 'Thread Next') {
            if (haveLinkRel) return;
            link = document.createElement('link');
            head = document.getElementsByTagName('head')[0];
            link.setAttribute('rel', 'next');
            link.setAttribute('href', e.getAttribute('href'));
            head.appendChild(link);
            haveLinkRel = true;
        }
    });
})();