gleish / Script Auto-Close Whatsapp reminders

// ==UserScript==
// @name         Script Auto-Close Whatsapp reminders
// @namespace    http://tampermonkey.net/
// @version      0.13
// @description  Latest version
// @author       gleish
// @license MIT
// @match        https://web.whatsapp.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var textbox;
    var success = false;

    let intervalFrame = setInterval(() => {
        textbox = document.querySelectorAll('div[data-tab="10"]')[0];

        if(textbox) {
            clearInterval(intervalFrame);

            let includes = textbox.textContent.includes('!!');

            if(includes) {
                console.log("closing");
                document.querySelector('span[data-icon="send"]').parentElement.click();
                if(window.opener) {
                    window.opener.postMessage('closed_successfully', '*');
                }

                setTimeout(() => {

                    window.close();

                }, 10000);
             
            }

        }

        console.log(textbox);
    }, 2000);

    // Your code here...
})();