whatsapp.toggle-button.user.js

// ==UserScript==
// @name        chats toggle button - whatsapp.com
// @match       https://web.whatsapp.com/
// @version     1.0
// @author      https://github.com/andersonbosa
// @description 7/3/2021, 2:20:32 PM
// ==/UserScript==


function addToggleButton () {
    // creating
    const smileBtn = window.document.querySelector('[data-state="closed"]')
    const newBtn = smileBtn.cloneNode(true)


    // adding
    parentDiv = smileBtn.parentNode
    parentDiv.appendChild(newBtn)
}

addToggleButton()

// problems:
//  each new chat need readd