Fix Aternos Load Speed

Blocks the slow header-bidding script on Aternos.
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// ==UserScript==
// @name         Fix Aternos Load Speed
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Blocks the slow header-bidding script on Aternos.
// @author       Dax
// @match        https://aternos.org/server/
// @match        https://aternos.org/servers/
// @run-at       document-start
// @grant        none
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    const targetDomain = 'hb.vntsm.com';

    const nativeCreateElement = document.createElement;
    document.createElement = function(tagName, options) {
        const el = nativeCreateElement.call(document, tagName, options);
        if (tagName.toLowerCase() === 'script') {
            const originalSetAttribute = el.setAttribute;
            el.setAttribute = function(name, value) {
                if (name === 'src' && value.includes(targetDomain)) {
                    return;
                }
                return originalSetAttribute.call(el, name, value);
            };
            Object.defineProperty(el, 'src', {
                set: function(value) {
                    if (value.includes(targetDomain)) {
                        return;
                    }
                    this.setAttribute('src', value);
                },
                get: function() {
                    return this.getAttribute('src');
                }
            });
        }
        return el;
    };

    const observer = new MutationObserver((mutations) => {
        for (const mutation of mutations) {
            for (const node of mutation.addedNodes) {
                if (node.tagName === 'SCRIPT' && node.src && node.src.includes(targetDomain)) {
                    node.type = 'javascript/blocked';
                    node.parentElement.removeChild(node);
                }
            }
        }
    });

    observer.observe(document.documentElement, {
        childList: true,
        subtree: true
    });
})();