// ==UserScript==
// @name         Old chat
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.twitch.tv/*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

var oldChat = false;
var chat;

new MutationObserver(function(mutations) {
    if (!chat)
        chat = document.querySelector("div.chat__container.full-width.full-height.overflow-hidden.flex.flex-column.flex-grow-1.flex-shrink-1 > div");
    if (chat) {
        if (!oldChat) {
            chat.innerHTML = '<iframe src="' + window.location.href + '/chat?popout=" style="height: 100%;"></iframe>';
            oldChat = true;
        }
        if (chat.childElementCount !== 1) {
            for (let x = 1;x < chat.childElementCount;x++) {
                chat.children[x].remove();
            }
        }
    }
}).observe(document, {childList: true, subtree: true});