When I'm simply trying to put el: ElementRef in my directive constructor and use it in my component, I get the following error:

```
ERROR Error: Uncaught (in promise): Error: StaticInjectorError(AppModule)[SampleDirective -> ElementRef]:
StaticInjectorError(Platform: core)[SampleDirective -> ElementRef]:
NullInjectorError: No provider for ElementRef!
Error: StaticInjectorError(AppModule)[SampleDirective -> ElementRef]:
StaticInjectorError(Platform: core)[SampleDirective -> ElementRef]:
NullInjectorError: No provider for ElementRef!
```

component:

```template: `

directive:

```
@Directive({
selector: '[bsRotate]'
})
export class SampleDirective {

constructor(el: ElementRef) {
console.log(el);
}

}

```

Why i'm unable to use the element reference in my directive when generating a library?

The issue identifies the generated Angular library's SampleDirective and its consumer template; start by reproducing the constructor injection in that setup and inspecting how the library is built and consumed. Done means the directive can inject ElementRef when applied to the shown element without a NullInjectorError.

Written by the indexing model from the issue text.