+ .then(bootstrapModule => {
+ // TODO: Uncomment and remove unregistration when https://github.com/angular/angular/issues/21191 is fixed
+ // TODO: Remove when https://github.com/angular/angular-cli/issues/8779 is fixed?
+ // if ('serviceWorker' in navigator && environment.production) {
+ // navigator.serviceWorker.register('/ngsw-worker.js')
+ // .catch(err => console.error('Cannot register service worker.', err))
+ // }
+
+ if (navigator.serviceWorker) {
+ navigator.serviceWorker.getRegistrations()
+ .then(registrations => {
+ for (const registration of registrations) {
+ registration.unregister()
+ }
+ })
+ }
+
+ return bootstrapModule
+ })
+ .catch(err => {
+ console.error(err)
+ return null
+ })