replace Yudkowsky with Ludkowsky on twitter

ludkowsky.user.js

// ==UserScript==
// @name           Replace Yudkowsky with Ludkowsky on Twitter
// @namespace      Violentmonkey Scripts
// @match          https://twitter.com/*
// @grant          none
// ==/UserScript==

(function() {
    'use strict';

    const replaceText = (text, source, replacement) => {
        const regex = new RegExp(source, 'gi');
        return text.replace(regex, replacement);
    }

    const replaceName = () => {
        const nameElems = document.querySelectorAll('[data-testid="UserCell"] span');
        nameElems.forEach(nameElem => {
            if (nameElem.innerText.includes('Yudkowsky')) {
                nameElem.innerText = replaceText(nameElem.innerText, 'Yudkowsky', 'Ludkowsky');
            }
        });
    }

    const replaceTweet = () => {
        const tweetElems = document.querySelectorAll('[data-testid="tweet"] span');
        tweetElems.forEach(tweetElem => {
            if (tweetElem.innerText.includes('Yudkowsky')) {
                tweetElem.innerText = replaceText(tweetElem.innerText, 'Yudkowsky', 'Ludkowsky');
            }
        });
    }

    const observer = new MutationObserver(mutations => {
        mutations.forEach(mutation => {
            if (mutation.type === 'childList') {
                mutation.addedNodes.forEach(node => {
                    if (node instanceof HTMLElement) {
                        if (node.matches('[data-testid="tweet"]')) {
                            replaceTweet();
                        } else if (node.matches('[data-testid="UserCell"]')) {
                            replaceName();
                        }
                    }
                });
            }
        });
    });

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

    replaceName();
    replaceTweet();
})();