Types for handler function

[M46O]

A nice improvement would be to add type control for the parameter that the pipe returns like this:

export class PipeFunction implements PipeTransform {
  public transform<Type>(value: any, handler: (value: any) => Type, context?: any): Type {
    if (context) {
      return handler.call(context, value);
    }

    return handler(value);
  }
}

https://www.typescriptlang.org/docs/handbook/2/generics.html#working-with-generic-type-variables

[nrauschcom]

Since this project seems to be unmaintained and the author didn't reply to my mail for some months, I would suggest you to take a look at ngx-function-expression