What steps should I follow to set up my Angular library so that it properly links to the right installation of RxJS for local testing?

I managed to successfully build, link, and import my library into my main application. However, I encountered an issue where the return type of the RxJs Observable from my library's node_modules is different from that in the main application's node_modules:

Type 'import("D:/KeySystems-Angular-Packages/node_modules/rxjs/internal/Observable").Observable<boolean>' is not assignable to type 'import("d:/KeySystems-WebCustomerPortal/node_modules/rxjs/internal/Observable").Observable<boolean>'.
  Types of property 'source' are incompatible.
    Type 'import("D:/KeySystems-Angular-Packages/node_modules/rxjs/internal/Observable").Observable<any>' is not assignable to type 'import("d:/KeySystems-WebCustomerPortal/node_modules/rxjs/internal/Observable").Observable<any>'.ts(2322)

The package.json file from my Angular Library's Workspace looks like this:

{
  "name": "key-systems-core-workspace",
  "version": "0.0.0",
  "scripts": {},
  "dependencies": {
    // Dependencies list here
  },
  "devDependencies": {
    // Dev dependencies list here
  }
}

Here is the configuration for the Library project itself:

{
  "name": "state-management",
  "version": "0.0.1",
  "peerDependencies": {
    "@angular/common": "^7.0.0",
    "@angular/core": "^7.0.0",
    "rxjs": "^6.5"
  }
}

the library's workspace's tsconfig:

{
  // Tsconfig settings here
}

my application's tsconfig:

{
  // Application tsconfig details
}

Peer dependencies should be specified in the tsconfig path according to my understanding. Initially, I included them in the library's tsconfig but faced issues, so I also added them to the application's tsconfig.

This discrepancy causes the following error:

getBusinessClaims(): Observable<IBusinessClaims> {
    return this.stateService.get<IBusinessClaims>(ClaimType.Business);
}

Answer №1

It initially seemed like the import error was due to a different file location, but it turned out to be caused by a version compatibility issue. To prevent this from happening again, I suggest locking the RxJs package on the minor version rather than the major one.

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