Browser window is not a constructor about electron-progressbar HOT 5 CLOSED

const {app, BrowserWindow, ipcMain} = require('electron');
const ProgressBar = require('electron-progressbar');

let mainWindow;
let progressBar;

function loadApp () {
  mainWindow = new BrowserWindow({
    width : 300,
    height : 200
  });
  
  mainWindow.loadURL(`file://${__dirname}/test_page.html`);
};

function showProgressbar () {
  if (progressBar) {
    return;
  }
  
  progressBar = new ProgressBar({
    text: 'Preparing data...',
    detail: 'Wait...'
  });
  
  progressBar
    .on('completed', function() {
      progressBar.detail = 'Task completed. Exiting...';
      progressBar = null;
    });
  
  // launch the task...
  // launchTask();
}

function setProgressbarCompleted () {
  if (progressBar) {
    progressBar.setCompleted();
  }
}

function init () {
  loadApp();
  
  ipcMain.on('show-progressbar', showProgressbar);
  
  ipcMain.on('set-progressbar-completed', setProgressbarCompleted);
}

app.on("ready", init);

ipc.send('set-progressbar-value', {value:9});

progressBar.value = x;