Understand OpaqueToken in Angular
When using provider string tokens, there’s a chance they collide with other third-party tokens. Angular has with the concept of opaque tokens, that allow us to make whatever token we use unique, so we don’t run into collision problems. In this lesson we’ll explore how they work.
Brian
~ 8 years ago
What about using a Symbol
jason huang
~ 8 years ago
If we change the third-party to also use an opaque token How does Angular know which 'API_URL' token to use ?
<pre><code> providers: [ DataService, ConsoleService, { provideL LogDebugger, useFactory: (consoleService) => { return new LogDebugger(consoleService, true); }, deps: [ConsoleService] }, { provide: API_URL , useValue: 'http://localhost:4200/api'; }, THIRD_PARTY_PROVIDERS ] </code></pre>Erik Nijland
~ 7 years ago
This is deprecated since Angular 4. They're recommending a switch to InjectionToken.