Hides the Zeplin sidebar that opens by default and requires mouse drag to close

hide_zeplin_sidebar.js

// ==UserScript==
// @name         Hide Zeplin Sidebar
// @namespace    https://app.zeplin.io/
// @version      0.1
// @description  Hides the Zeplin sidebar that opens by default and requires mouse drag to close
// @author       Carlos Feliciano-Barba
// @match        https://app.zeplin.io/project/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    (new MutationObserver(check)).observe(document, {childList: true, subtree: true});

    function check(changes, observer) {
        // Disconnect the observer once the elements are rendered
        if(document.querySelector('.sidebar .tabContent')) {
            observer.disconnect();

            var sidebar = document.querySelector('.sidebar');
            sidebar.classList.add("collapsed");
            sidebar.style.minWidth = "10px";
        }
    };
})();