Getting dependency from Injector manually inside a directive

Question

I am trying to create a generic directive which will take a class type for rule validation and according to the rule in the class the directive will either show or hide an e

Answer 1

Just update for Angular version 10+:

• From your service:

  @Injectable({
    providedIn: 'any'
  })
  export class AdminOnly { ... }

• In your directive or a pure function, ...:

 import { Injector } from '@angular/core';

 ...
 const injector: Injector = Injector.create({
   providers: [{provide: AdminOnly, deps: []}]
 });
 const adminOnly: AdminOnly = injector.get(AdminOnly);

 let show = adminOnly.shouldShowElement();
 ...

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