main.js

const { app, BrowserWindow, Menu } = require('electron');
const path = require('path');

// Create new window
function createWindow () {
    const win = new BrowserWindow({
        width: 800,
        height: 600,
        webPreferences: {
            preload: path.join(__dirname, 'preload.js'),
            nodeIntegration: true,
            contextIsolation: false,
            enableRemoteModule: true
        }
    });
    win.maximize();

    win.loadFile('index.html');
}

// When app starts
app.whenReady().then(() => {
    createWindow();

    app.on('activate', () => {
        if (BrowserWindow.getAllWindows().length === 0) {
            createWindow();
        }
    });
})

// When app closes
app.on('window-all-closed', () => {
    if (process.platform !== 'darwin') {
        app.quit();
    }
});