// ==UserScript==
// @name         Auto Rejoin
// @namespace    https://greasyfork.org/users/945115
// @version      0.1
// @license      GPL-3.0
// @description  Automatically attempts to rejoin if a room is full.
// @author       left paren
// @match        https://bonk.io/gameframe-release.html
// @run-at       document-end
// @grant        none
// @downloadURL none
// ==/UserScript==

var target = document.getElementById("sm_connectingWindow_text")

var observer = new MutationObserver(function(mutations) {
    if (target.innerText.indexOf("room_full") != -1) {
        document.getElementById("roomlistjoinbutton").click()
    }
});

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