main.js

const { app, BrowserWindow } = require('electron')
if (require('electron-squirrel-startup')) return app.quit();
function createWindow () {
  // Create the browser window.
  let win = new BrowserWindow({
    width: 1000,
    height: 650,
    webPreferences: {
      nodeIntegration: true
    }
  })

  // and load the index.html of the app.
  win.loadFile('index.html')
  // win.webContents.openDevTools()
}

app.whenReady().then(createWindow)

app.on('window-all-closed', () => {
  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 (BrowserWindow.getAllWindows().length === 0) {
    createWindow()
  }
})