Ensure that the function's parameters are entered exclusively through TypeScript interfaces

How can I efficiently organize and maintain the function's arguments below without utilizing Typescript? Can this be achieved using Interfaces?

// external file
export interface TSomeFunctionArgs {
   someKey: string
   // there should also be a type for a function here
} 

// main file
import { TSomeFunctionArgs } from "pathToFile"

const someFunction = (args: TSomeFunctionArgs) => {
   // ... function's logic
}

someFunction({ someKey: "some string" }, someAnotherFunction)

In this scenario, I am passing two arguments - an object with a specific key-value pair as the first argument, and any function as the second argument.

Is there a way to accurately describe this setup in the Interface defined above?

Answer №1

Utilizing generics in this scenario allows for a more flexible approach, and the implementation would look similar to the following:

interface ArgsType {
   key: string
} 

const myFunction = <X, Y>(args: X, callback: Y) => {
   // ... function's logic
}

function anotherFunction() {}

// By using generics, you can specify the types of both parameters when calling the function.
myFunction<ArgsType, () => void>({ key: "example" }, anotherFunction)

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