open mulitple browserWindows with parent atach electronjs code example

Example 1: create window electron

const createWindow = () => {
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 400,
  });
  mainWindow.loadFile(path.join(__dirname, 'index.html'));
};

Example 2: create window electron

app.on('ready', createWindow);