Userscript that detects unwanted popups on the Amazon Music web player and closes them automatically (like asking "Hören Sie noch zu?" or trying to sell Amazon Music Unlimited memberships)

Amazon Music Dialoghandler.user.js

// ==UserScript==
// @name         Amazon Music Dialoghandler
// @namespace    https://gist.github.com/neon-dev
// @version      0.2
// @description  Closes unwanted popups on the Amazon Music web player
// @author       Neon
// @match        https://music.amazon.de/*
// @match        https://music.amazon.com/*
// @match        https://music.amazon.co.uk/*
// @icon         https://d5fx445wy2wpk.cloudfront.net/icons/amznMusic_favicon.png
// @updateURL    https://gist.github.com/neon-dev/8ad468508996a6fff17c8c237d689c71/raw
// @downloadURL  https://gist.github.com/neon-dev/8ad468508996a6fff17c8c237d689c71/raw
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    const buttonQuerySelectorByDialogTitle = {
        'Melden Sie sich bei Amazon Music Unlimited an':                '#dialogCloseButton music-button',
        'Sign Up for Amazon Music Unlimited':                           '#dialogCloseButton music-button',
        'Dieses Feature ist nur mit  Amazon Music Unlimited verfügbar': '#dialogCloseButton music-button',
        'This feature is only available with Amazon Music Unlimited':   '#dialogCloseButton music-button',
        'Hörst du noch zu? ':                                           '#dialogButton1',
        'Are you still listening ? ':                                   '#dialogButton1'
    }
    new MutationObserver((mutations, observer) => mutations.forEach(m => m.addedNodes.forEach(handle)))
        .observe(document.querySelector('#overlay div'), { subtree: true, childList: true });

    handle(document.getElementById('dialog')); // sometimes the popup is shown on page (re)load

    function handle(dialog) {
        const dialogTitle = dialog?.id === 'dialog' ? dialog.querySelector('#dialogHeader').textContent || dialog.querySelector('#dialogBodyText').textContent : '';
        const buttonQuerySelector = dialogTitle ? buttonQuerySelectorByDialogTitle[dialogTitle] : null;
        if (buttonQuerySelector) {
            const button = dialog.querySelector(buttonQuerySelector);
            if (button) {
                button.click();
                console.debug('[Amazon Music Dialoghandler] Clicked button ' + (button.textContent ? '"' + button.textContent + '" ' : '') + 'of dialog: "' + dialogTitle + '"');
            } else {
                console.debug('[Amazon Music Dialoghandler] No button matched configured query selector for dialog: "' + dialogTitle + '"');
            }
        } else if (dialogTitle) {
            console.debug('[Amazon Music Dialoghandler] No action for dialog: ' + dialogTitle);
        }
    }
})();