main.js

const electron = require('electron');
// Module to control application life.
// const {app} = electron;
// Module to create native browser window.
// const {BrowserWindow} = electron;
const {app, BrowserWindow, ipcMain} = require('electron')

// var ipc = require('electron').ipcMain;


// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let win;

// Capture command line argument
let argsCmd = process.argv.slice(2);
let timerTime = parseInt(argsCmd[0]);

function createWindow() {
    // Create the browser window.
    win = new BrowserWindow({
        fullscreen: true,
        frame: false,
        width: 1280,
        height: 768,
        minWidth: 1024,
        minHeight: 576,
        resizable: true
    });
    // and load the index.html of the app.
    console.log('file:///' + __dirname + '/app/index.html');
    // win.loadURL('file:///app/index.html');
    win.loadURL('file:///' + __dirname + '/app/index.html');
    // setTimeout(() => {
    //     win.loadURL(`file:///${__dirname}/app/index.html`);
    //     win.webContents.openDevTools();
    // }, 2000); // 1 second wasn't enough lol

    // win.setMenu(null);

    // Open the DevTools.
    // win.webContents.openDevTools();

    // Emitted when the window is closed.
    win.on('closed', () => {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        win = null;
    });

    // When UI has finish loading
    // win.webContents.on('did-finish-load', () => {
    //     // Send the timer value
    //     win.webContents.send('timer-change', timerTime);
    // });
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', () => {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') {
        app.quit();
    }
});

app.on('activate', () => {
    // On OS X it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (win === null) {
        createWindow();
    }
});