main.js

// Modules to control application life and create native browser window
const { app, BrowserWindow, ipcMain, shell, dialog, Menu } = require('electron')
const path = require("path");

const menu = Menu.buildFromTemplate([])
Menu.setApplicationMenu(menu)

let mainWindow

if (process.defaultApp) {
  if (process.argv.length >= 2) {
    app.setAsDefaultProtocolClient('myori-thermal', process.execPath, [path.resolve(process.argv[1])])
  }
} else {
  app.setAsDefaultProtocolClient('myori-thermal')
}

const gotTheLock = app.requestSingleInstanceLock()

if (!gotTheLock) {
  app.quit()
} else {
  // Create mainWindow, load the rest of the app, etc...
  app.whenReady().then(() => {
    createWindow()
  })
}

function createWindow() {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 300,
    height: 300,
    icon: path.join(__dirname, "assets/myorilogo.png"),
    webPreferences: {
      preload: path.join(__dirname, "preload.js"),
      nodeIntegration: true,     // ATENÇÃO AQUI - attention here - that's why your node_module works or not
    },
  });


  mainWindow.setResizable(false)
  // and load the index.html of the app.
  mainWindow.loadFile("index.html");

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

// 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 () {
  if (process.platform !== "darwin") app.quit();
});