InversifyJS - What is the difference between .to and .toService?

Question

I'm confused by the documentation, which states that .toService(MyClass) is used for transitive bindings. But in the examples shown, i can achieve the same thing using a regular .to(MyClass) as well.

https://github.com/inversify/InversifyJS/blob/master/wiki/transitive_bindings.md

What is the concrete use case of .toService()?

Answer 1

You use the .to() method is used when you are binding an interface or symbol to a concrete class.

container.bind(B).to(A);

For the .toService() method is used when you want to bind an interface or symbol to an already bound service in the container. InversifyJS will not create a new instance, but will return the same instance that was bound to the original service.

container.bind(C).toService(B);