Cmd + Enter = Save on Google Calendar #tampermonkey

save-shortcut-google-calendar.js

// ==UserScript==
// @name         Google Calendar (Cmd + Enter = Save)
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Saves a calendar event when Cmd + Enter is pressed.
// @author       Trevi Awater
// @match        https://calendar.google.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    let isHoldingCmd = false;

    document.addEventListener('keydown', keyDown);
    document.addEventListener('keyup', keyUp);

    function keyDown (e) {
        if (e.code === 'MetaLeft') {
           isHoldingCmd = true;
        }

        else if (e.code === 'Enter' && isHoldingCmd) {
            document.getElementById('xSaveBu').click();
        }
    }

    function keyUp (e) {
        if (e.code === 'MetaLeft') {
           isHoldingCmd = false;
        }
    }
})();