Solvedangular Library code cannot utilize critical services

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x ] Bug report  
[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

Current behavior

If a packaged library is included in an Angular project, many framework provided services are not available to it, such as Router and ViewContainerRef. For example:

StaticInjectorError[Router]:
StaticInjectorError[Router]:
NullInjectorError: No provider for Router!

Other services have errors, such as Http having CookieXSRFStrategy.configureRequest throw the following error:

Cannot read property 'getCookie' of null

Expected behavior

These services to be available to library code by default, or in the worst case there is a mechanism to provide them.

Minimal reproduction of the problem with instructions

  1. Start a package library from https://github.com/dherges/ng-packaged
  2. In the default service of that seed, inject Router via the constructor
  3. Build the package using npm run buid:lib
  4. Create a basic angular application with routing using the CLI
  5. npm link to the created package
  6. Add a dependency to the package's service in app component
  7. Serve the application and open the dev console to see the errors

What is the motivation / use case for changing the behavior?

The current restrictions effectively make building a maintainable platform around Angular impossible as complex libraries simply fail.

Specifically, I am trying to make a library that contains modules preconfigured with routes, guards, and complex components. Some of these components rely on ng-bootstrap (which of course is listed as a dependency of the library). So far this has proved impossible using the Angular package format and webpack; which I would really like to use as it seems to be the "official" approach.

Environment

Angular version: 5.0.2

Browser:
- [ x] Chrome (desktop) version 62.0
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: 9.1  
- Platform:  Windows

Others:
The site is being served through IIS express. 

I have found a partial workaround as I can export an abstract class from the package that the application implements to provide the restricted functionality. Unfortunately this approach doesn't seem to apply to all the restricted providers.

15 Answers

✔️Accepted Answer

In case someone is using npm link(s), the following does the job:

In .angular-cli.json add/replace:

"defaults": {
    "styleExt": "css",
    "component": {},
    "build": {
        "preserveSymlinks": true
    }
}

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