mtb-news.de Userscript, um alle neuen Beiträge mit einem Klick zu öffnen

mtb-news.de-notification.button.user.js

// ==UserScript==
// @name         mtb-news.de - Add "Open New Notifications" Button
// @namespace    net.sp00n
// @match        https://www.mtb-news.de/forum/*
// @grant        none
// @version      1.4
// @author       sp00n82
// @description  This needs an additional setting, at least for Firefox: Firefox Options -> Privacy & Security -> Permissions -> Block pop-up windows -> Exceptions -> Add "https://www.mtb-news.de" to the Allowed Websites list
// @downloadURL  https://gist.github.com/sp00n/61c2e6cf33553bf4d56062783a9228d3
// @license      Creative Commons CC BY-SA 3.0 DE
// ==/UserScript==

// Adds an "open new" button to the header of the notification popup
(function() {
    console.log("Init mtb-news notification observer");

    const buttonString = "Neue öffnen";
    const domain = "https://www.mtb-news.de";

    // Add the open all link element
    const addOpenAllLinkFunc = function(ele) {
        const header = ele.querySelector(".menu-header");

        // The open new link already exists
        if ( header.querySelector(".open-all-notifications") ) {
            console.log("Link already exits, aborting!");
            return false;
        }

        // Create the link element
        let button = document.createElement("button");
        button.classList.add("open-all-notifications", "button--primary", "button", "button--icon", "button--icon--notificationsOn");
        button.style.cssText = `
            font-size: 0.7em;
            position: relative;
            left: 1.5em;
        `;

        let span = document.createElement("span");
        span.classList.add("button-text");
        span.textContent = buttonString;

        button.appendChild(span);

        // And the click observer
        button.addEventListener("click", function(event) {
            event.preventDefault();

            // Handle only left and middle mouse clicks
            if ( event.which > 2 ) {
                console.log("Wrong mouse button, aborting");
                return;
            }

            const list  = ele.querySelector(".listPlain");
            const lis   = list.querySelectorAll("li.menu-row.is-unread");
            const aEles = [...lis].map(function(entry) {   // NodeList to Array
                return entry.querySelector("a.fauxBlockLink-blockLink");
            });
            const links = aEles.map(function(entry) {
                return entry.getAttribute("href");
            });

            let counter = 1;

            // Open each link in a new window (tab)
            links.forEach(function(link, key) {
                // Ignore links to other domains (e.g. Winterpokal)
                if ( link.indexOf("http") == 0 || link.indexOf("ftp") == 0 ) {
                    return;
                }

                window.open(domain + link, `_newtab_${counter}_${Date.now()}`);
                counter++;
            });
        });

        header.appendChild(button);
    };


    // Observe the notification popup element
    const observeElement = document.querySelector("div.menu[data-href='/forum/account/alerts-popup']");

    // Set up a Mutation Observer
    const config = {
          attributes        : true
        , attributeOldValue : true
        , attributeFilter   : ["class"]
    };

    // Observe it for class changes (which happens when it gets openend)
    const observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
            if ( mutation.attributeName == "class" ) {
                let ele = mutation.target;

                // The popup has finished opening, now we can add the open all link
                if ( ele.classList.contains("is-active") && ele.classList.contains("is-complete") && !ele.classList.contains("is-transitioning") ) {
                    addOpenAllLinkFunc(ele);
                }
            }
        });
    });

    observer.observe(observeElement, config);
})();

I liked your code, I implemented it in Tampermokey,
I sent you an email so you could help me with something related to it.