I have the following code:

Let’s say I have a generic function with the following definition:

Let’s say I have a generic function with the following definition:

This question already has answers here: Typescript Function with Generic Return Type (3 answers) ‘R’ could be instantiated with an arbitrary type which could be unrelated to ‘Response<Command>’ (2 answers) TypeScript Generics with interface parameters (2 answers) Closed 4 mins ago. Given type Fn = <T extends Event>(e: T) => any; const fn: Fn = […]

This question already has answers here: Typescript Function with Generic Return Type (3 answers) ‘R’ could be instantiated with an arbitrary type which could be unrelated to ‘Response<Command>’ (2 answers) TypeScript Generics with interface parameters (2 answers) Closed 4 mins ago. Given type Fn = <T extends Event>(e: T) => any; const fn: Fn = […]

I’m defining an RPC-like interface using single huge nested type that names, in order, the namespace, the method name, and the parameters:

I am trying to understand how to use generic in typescript.
I have the following code

I am making a simple i18n system.
I have an object, which keys are language codes and values are phrases objects: phraseId: phraseText.

I am making a simple i18n system.
I have an object, which keys are language codes and values are phrases objects: phraseId: phraseText.

What is the difference between: