main.js

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

app.on('window-all-closed', function () {
  if (process.platform != 'darwin') {
    app.quit();
  }
});
let win;
function createWindow() {
  // Create the browser window.
  win = new BrowserWindow({ width: 1360, height: 800 });
  win.loadURL(`file://${__dirname}/src/index.html`);

  // 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
  })
}
app.on('ready', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  // On macOS 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 macOS 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();
  }
});