Show progress percentage of cache.add() in Service Worker

Question

• In AngularJS 1.5, I replaced ServiceWorker instead of ApplicationCache(because of deprecation)
• In ApplicationCache version, there was a dialog box showing progress

applicationCache.addEventListener('progress', function (e) { ... }

• I would like to do same way in ServiceWorker version, however, I couldn't find the solution of showing progress dialog in SW(there is no progress event in SW)

• I've found the following similar questions but they don't solve

  1. Show progress while caching files using a service worker
  2. service worker cache progress

• Is there anyone who've got the way to show the progress of caching file in ServiceWorker? Thanks a lot in advance !!!