Outlook unread email count

Display the number of unread messages in the tab title

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Outlook unread email count
// @description Display the number of unread messages in the tab title
// @author      Drew Burden
// @namespace   DrewABurden
// @version     1.0
// @match       https://outlook.office365.com/*
// @license     MIT
// @grant       none
// ==/UserScript==
var title;

function updateUnreadCount()
{
    var url = window.location.href;
    if (url.startsWith("https://outlook.office365.com/mail"))
    {
        var numUnread = 0;

        var unreadEls = document.evaluate("//div[@data-folder-name='inbox']//span[contains(., 'unread')]", document, null, XPathResult.ANY_TYPE, null );
        var unreadElContainer = unreadEls.iterateNext();
        if (unreadElContainer)
        {
            numUnread = unreadElContainer.firstChild.firstChild.innerText;
        }

        if (numUnread > 0)
        {
            document.title = "(" + numUnread + ") " + title;
        }
        else
        {
            document.title = title;
        }
    }
    setTimeout(updateUnreadCount, 5 * 1000);
}

function getInitialTitle()
{
    var url = window.location.href;
    if (url.startsWith("https://outlook.office365.com/mail"))
    {
        title = document.title;
        updateUnreadCount();
    }
    else
    {
        setTimeout(getInitialTitle, 5 * 1000);
    }
}

(
    function()
    {
        'use strict';
        setTimeout(getInitialTitle, 3000);
    }
)();