Improvised Twitch emotes

twitch-emote.js

(function() {
    const emoteMap = {
        "monke": "🐒",
        "pog": "😲",
        "pepega": "🧠❌",
        "sadge": "😢",
        "OMEGALUL": "🤣",
        "KEKW": "😂",
        "PeepoHappy": "😊",
        "FeelsStrongMan": "💪",
        "catJAM": "🐱🎵",
        "PepeHands": "🙌🐸",
        "PepeLaugh": "😏🐸",
        "widepeepoHappy": "😀✨"
    };

    const replaceWithEmotes = (node) => {
        if (node.nodeType === Node.TEXT_NODE) {
            let original = node.textContent;
            for (let keyword in emoteMap) {
                let regex = new RegExp(keyword, 'gi'); // global + case insensitive
                original = original.replace(regex, emoteMap[keyword]);
            }
            node.textContent = original;
        } else if (node.nodeType === Node.ELEMENT_NODE) {
            node.childNodes.forEach(replaceWithEmotes);
        }
    };

    const target = document.querySelector('.chat-list--default');

    if (target) {
        replaceWithEmotes(target);

        const observer = new MutationObserver((mutations) => {
            mutations.forEach((mutation) => {
                mutation.addedNodes.forEach(replaceWithEmotes);
            });
        });

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

        console.log('Twitch-style emote replacer is now live! 🐸');
    } else {
        console.warn('No element found with .chat-list--default');
    }
})();

Just paste this in your browser dev console.
What could go wrong 😳