Angular 6 / 7 “the result of a dependency is an expression”

Question

I\'m trying to create an Angular 6 library and use it in an Angular 6 app. I\'ve boiled it down to a minimal test case. (Update: since Angular 7 is out, I\'ve tried that as

Answer 1

I encountered the same warning about "the result of a dependency is an expression” referencing fesm5.js in a new Angular 7 cli generated project.

This particular project has a reference to a local npm package with a relative path beginning with file://../ which seemed to cause the warning.

After some research I found this Github issue which explains how we can fix it in Angular 6+ cli generated apps.

What worked for me was to open the angular.json file in the client project's root folder (not the shared library's) and find this path:

projects > (your project name) > architect > build > options

and add the key:

"preserveSymlinks": true

with all the rest of the file omitted here are the relevant parts:

{
  "projects": {
    "MyAwesomeProject": {
      "architect": {
        "build": {
          "options": {
            "preserveSymlinks": true
          }
        }
      }
    }
  }
}

After adding this I get normal ng build without warnings. Hope that helps!