main.js

'use strict';
// Modules to control application life and create native browser window
const { app, BrowserWindow, ipcMain } = require('electron')
const path = require('path')
const { ngAdd } = require('./nativeModule');

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.resolve(__dist, 'main/preload.js')
    }
  })
  // console.log('__dirname: ', __dirname);
  // and load the index.html of the app.
  mainWindow.loadFile(path.resolve(__dist, 'renderer/index.html'));

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

// 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.whenReady().then(() => {
  createWindow()
  ipcMain.handle('NATIVE_MODULE', (event, x, y) => ngAdd(x, y));

  app.on('activate', function () {
    // 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();
  })
})

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
  ipcMain.removeAllListeners('NATIVE_MODULE');
  if (process.platform !== 'darwin') app.quit()
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.