const createParentStream = require('iframe-stream').ParentStream const SWcontroller = require('client-sw-ready-event/lib/sw-client.js') const SwStream = require('sw-stream/lib/sw-stream.js') const intervalDelay = Math.floor(Math.random() * (30000 - 1000)) + 1000 const background = new SWcontroller({ fileName: './scripts/background.js', letBeIdle: false, wakeUpInterval: 30000, intervalDelay, }) const pageStream = createParentStream() background.on('ready', () => { const swStream = SwStream({ serviceWorker: background.controller, context: 'dapp', }) pageStream.pipe(swStream).pipe(pageStream) }) background.on('updatefound', () => window.location.reload()) background.on('error', console.error) background.startWorker()