NG6 - ngsw doesn't work offline

[renydev]

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Command (mark with an x)

- [ ] new
- [x] build
- [ ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Versions

Win 10
Angular CLI: 6.2.2
Node: 8.11.2
npm: 5.6.0
OS: win32 x64
Angular: 6.1.7
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router, service-worker

Package Version

@angular-devkit/architect 0.8.2
@angular-devkit/build-angular 0.8.2
@angular-devkit/build-optimizer 0.8.2
@angular-devkit/build-webpack 0.8.2
@angular-devkit/core 0.8.2
@angular-devkit/schematics 0.8.2
@angular/cdk 6.4.7
@angular/cli 6.2.2
@angular/material 6.4.7
@angular/pwa 0.8.2
@ngtools/webpack 6.2.2
@schematics/angular 0.8.2
@schematics/update 0.8.2
rxjs 6.2.2
typescript 2.9.2
webpack 4.19.0

Repro steps

To reproduce this bug you can:

• npm install -g @angular/cli@latest
• ng new project
• ng add @angular/material
• ng add @angular/pwa
• ng build --prod

I did some lazy load but I think it doesn't matter...

The log given by the failure

When I refresh the browser on offline mode, none of my files stay on cache. The service worker ngsw-worker.js get registered normally online andit seems that cache some of my *.js and *.css files, but not my main.js or index.html. And then, again, offline it caches nothing.

I would like to solve this by not creating my own sw.js, but I am new at angular and I think it is the only way for now.