Userscript - Horizontal Scroll Google Calendar

calendarscroll.user.js

// ==UserScript==
// @name         Shift Scroll google calendar
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Enables holding shift + scrolling to move to previous/next day/week/month.
// @author       Nathan Beals
// @updateURL    https://gitlab.com/-/snippets/2543244/raw/main/calendarscroll.user.js
// @downloadURL  https://gitlab.com/-/snippets/2543244/raw/main/calendarscroll.user.js
// @match        https://calendar.google.com/calendar/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function SingleContains(selector, text) {
        var elements = Array.from(document.querySelectorAll(selector));

        return elements.find(el => RegExp(text).test(el.textContent))
    }

    function NextWeek() {
        let next = SingleContains("button > i", "navigate_next")

        if (next) {
            next.click()
        }
    }

    function PrevWeek() {
        let prev = SingleContains("button > i", "navigate_before")

        if (prev) {
            prev.click()
        }
    }


    const validPathRegex = RegExp("/day|/week|/agenda|/customday")
    const basePathRegex = RegExp("^/calendar/u/0/r/?$")

    document.addEventListener('wheel',(event) => {
        if (event.shiftKey && (validPathRegex.test(window.location.pathname) || basePathRegex.test(window.location.pathname) )) {

            if (event.deltaX > 0) { // scroll down
                NextWeek()
            }
            else if (event.deltaX < 0) { // scroll up
                PrevWeek()
            }
        }
    });

})();