docs.sheetjs.com/docz/static/electron/main.js

/* sheetjs (C) 2013-present SheetJS -- http://sheetjs.com */
var electron = require('electron');
var XLSX = require('xlsx');
var app = electron.app;
require('@electron/remote/main').initialize(); // required for Electron 14+

var win = null;

function createWindow() {
  if (win) return;
  win = new electron.BrowserWindow({
    width: 800, height: 600,
    webPreferences: {
      worldSafeExecuteJavaScript: true, // required for Electron 12+
      contextIsolation: false, // required for Electron 12+
      nodeIntegration: true,
      enableRemoteModule: true
    }
  });
  win.loadURL("file://" + __dirname + "/index.html");
  require('@electron/remote/main').enable(win.webContents); // required for Electron 14+
  win.webContents.openDevTools();
  win.on('closed', function () { win = null; });
}
if (app.setAboutPanelOptions) app.setAboutPanelOptions({ applicationName: 'sheetjs-electron', applicationVersion: "XLSX " + XLSX.version, copyright: "(C) 2017-present SheetJS LLC" });
app.on('open-file', function () { console.log(arguments); });
app.on('ready', createWindow);
app.on('activate', createWindow);
app.on('window-all-closed', function () { if (process.platform !== 'darwin') app.quit(); });