TownStar Additional Leaderboard Buttons

// ==UserScript==
// @name         Leaderboard Jump
// @namespace    http://tampermonkey.net/
// @version      1
// @description  Adds jump to buttons for the leaderboard
// @author       wherr
// @match        https://townstar.sandbox-games.com/launch
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    // Change these to whatever additional buttons you want (set to May Mayhem by default)
    let jumpToButtons = [
        2000,
        1000,
        300,
        200,
        100,
    ];
    let loaded = 0;

    new MutationObserver(function(mutations) {
        if (document.querySelector('.leaderboard .tab-buttons') && loaded == 0) {
            loaded = 1;
            LoadLeaderBoardJumpButtons();
            self.disconnect();
        }
    }).observe(document, {childList: true, subtree: true});

    function LoadLeaderBoardJumpButtons() {
        let tabButtons = document.querySelector('.leaderboard .tab-buttons');

        for (let button of jumpToButtons) {
            let buttonElem = document.createElement('button');
            buttonElem.classList.add('tab', 'button-top-' + button);

            let buttonSpan = document.createElement('span');
            buttonSpan.innerHTML = 'Top ' + button;

            buttonElem.onclick = function (){
                let leaderboardUI = Game.app.root.findByName('LeaderboardUi').script.leaderboardUi.UI;
                leaderboardUI.playerTarget && API.scoreLeaderboard(button - 5, button + 5).then((e=>{
                    leaderboardUI.playerTarget.innerHTML = "",
                    leaderboardUI.setLeaderboard(e, !0);
                    leaderboardUI.div.querySelector(".player-rank-" + button).scrollIntoView();
                }
                ))
            };

            buttonElem.appendChild(buttonSpan);
            tabButtons.insertBefore(buttonElem, tabButtons.querySelector('.button-top-10'));
        }
    }
})();