main.js

const { app, BrowserWindow } = require('electron');
const remote = require('@electron/remote/main');

const path = require('path');
const url = require('url');

let mainWindow;

function createWindow() {
  mainWindow = new BrowserWindow({
    webPreferences: {
      webSecurity: false,
      nodeIntegration: true,
      contextIsolation: false,
      enableRemoteModule: true,
    },
    autoHideMenuBar: true,
    // fullscreen: true,
    show: false
  });

  remote.enable(mainWindow.webContents);

  mainWindow.loadURL(url.format({
    pathname: path.join(__dirname, 'index.html'),
    protocol: 'file:',
    slashes: true
  }));

  // mainWindow.webContents.openDevTools()

  mainWindow.on('closed', () => {
    mainWindow = null;
  });

  mainWindow.once('ready-to-show', () => {
    mainWindow.maximize();
    mainWindow.show();
  });
}

remote.initialize();

app.on('ready', createWindow);

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});

app.on('activate', () => {
  if (mainWindow === null) {
    createWindow();
  }
});