A Tampermonkey script to hide the gmail inbox to prevent being distracted

hide-gmail-inbox.js

// ==UserScript==
// @name         Temporarily hide gmail inbox at first
// @namespace    http://matt.might.net/
// @version      0.1
// @description  Intended to prevent being distracted by your inbox if you meant to send an email or search your inbox. Mouse over the Gmail in upper left to make it re-appear.
// @author       Matt Might
// @match        https://mail.google.com/mail/u/0/
// @icon         https://www.google.com/s2/favicons?domain=google.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // Your code here...

    setTimeout(function () {

        // WARNING: If the class name changes from "Cp" this will break:
        var inboxDivs = document.getElementsByClassName("Cp") ;

        var mainInbox = inboxDivs[1] ;

        mainInbox.style.display = "none" ;

        var inboxLabel = null;

        function showInboxAgain () {
            mainInbox.style.display = "block";

            inboxLabel.removeEventListener("mouseover",showInboxAgain,false) ;
        }

        var divs = document.getElementsByTagName("a");

        for (var i = 0; i < divs.length; ++i) {
            var d = divs[i] ;
            if (d.getAttribute("href") == "#inbox") {
                inboxLabel = d;
            }
        }

        inboxLabel.addEventListener("mouseover",showInboxAgain,false);

    },2000) ;

})();