As Ivy is behaving differently, it is now mandatory to add @Injectable on a service.
This commit adds an update note at the beginning of an old blog post of mine where I explained how @Injectable worked,
and warns that this is no longer the case in Angular 9/Ivy.
As Ivy is behaving differently, it is now mandatory to add
@Injectableon a service. This commit adds an update note at the beginning of an old blog post of mine where I explained how@Injectableworked, and warns that this is no longer the case in Angular 9/Ivy.