It's all aspects of the same thing. You can't inject a nuclear reactor into a burrito in any language untyped or not because it will lead to an error. The onl

It's all aspects of the same thing. You can't inject a nuclear reactor into a burrito in any language untyped or not because it will lead to an error. The only difference is python/js the error will happen at runtime while in C$/java the error happens at compile time. The main difference is the type. In typed languages you need describe am interface or a class of types if you want to do mocking or dynamic dispatch while in dynamic languages you don't need to explicitly define this as a type, the definition exists in how you use the object that is passed in. Either way DI, however universal, in any language is bad practice.