Electronで、ファイル保存

const remote = require('electron').remote;
const {dialog} = require('electron').remote;
var fs = require('fs');

var window = remote.getCurrentWindow();
var options = {
  title: 'タイトル',
  filters: [
    { name: 'ドキュメント', extensions: ['txt', 'text']},
    { name: 'All Files', extensions: ['*'] }
  ],
  properties: ['openFile', 'createDirectory']
};
dialog.showSaveDialog(window, options,
  // コールバック関数
  function (filename) {
    if (filename) {
      var data = 'ほげほげー';
      writeFile(filename, data);
    }
  });
console.log('saved!');

function writeFile(path, data) {
  fs.writeFile(path, data, 'utf8', function (err) {
    if (err) {
      return console.log(err);
    }
  });
}