EDIT(@gkalpak): Related to issue #24387.

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[x ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question
[ ] Other... Please describe:

Current behavior

I have my own service worker that listening push event. While building ngsw-worker.js auto generated and having push event available. Due to this website is showing notification two times. One from my service worker and another from ngsw-worker.js file.

Currently I have to comment that code each time I am building dist folder. Is there any option available that will automatically not include this push event listener?

this.scope.addEventListener('push', (event) => this.onPush(event));

Expected behavior

There should be option to not include this event.

Minimal reproduction of the problem with instructions

Problem required no plunkr. Its happening with PWA service worker js file.

Environment

Angular version: latest


Browser:
- [x] Chrome (desktop) version all
- [x] Chrome (Android) version all
- [x] Chrome (iOS) version all
- [x] Firefox version all
- [x] Safari (desktop) version all
- [x] Safari (iOS) version all
- [x] IE version all
- [x] Edge version all