Error when trying to inject a service into an angular component “EXCEPTION: Can't resolve all parameters for component”, why?

Question

I\'ve built a basic app in Angular, but I have encountered a strange issue where I cannot inject a service into one of my components. It injects fine into any of the three o

Answer 1

For the benefit of searchers; I got this error. It was simply a missing @ symbol.

I.e. This produces the Can't resolve all parameters for MyHttpService error.

Injectable()
export class MyHttpService{
}

Adding the missing @ symbol fixes it.

@Injectable()
export class MyHttpService{
}