create-file.js

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

const path = require('path')
const url = require('url')
const Storage = require('./storage.js');

// First instantiate the class
const storage = new Storage({
  defaults: {}
});

// 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 mainWindow

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({width: 800, height: 600})

  // and load the index.html of the app.
  mainWindow.loadURL(url.format({
    pathname: path.join(__dirname, 'create-file.html'),
    protocol: 'file:',
    slashes: true
  }))

  // The BrowserWindow class extends the node.js core EventEmitter class, so we use that API
  // to listen to events on the BrowserWindow. The resize event is emitted when the window size changes.
  mainWindow.on('resize', () => {
    // The event doesn't pass us the window size, so we call the `getBounds` method which returns an object with
    // the height, width, and x and y coordinates.
    let { width, height } = mainWindow.getBounds();
  });

  // Open the DevTools.
  mainWindow.webContents.openDevTools()

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // 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.
    mainWindow = null;

    storage.saveProject('project1', {'name': 'test', 'id': 5});
  })
}

// 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', function () {
  // 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', function () {
  // 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 (mainWindow === null) {
    createWindow()
  }
})