What is Root Container Resolution in Aurelia?
Imagine that we have a single instance of Container called root. If a developer (or Aurelia) invokes root.get(A) to resolve an instance of A, the root will first check to see if it has a Resolver for A. If one is found, the Resolver is used to get the instance, which is then returned to the developer. If one is not found, the container will auto-register a Resolver for A. This resolver is configured with a singleton lifetime behavior. Immediately after auto-registration, the Resolver is used to get the instance of A which is returned to the developer. Subsequent calls to root.get(A) will now immediately find a Resolver for A which will return the singleton instance.
