What is the most effective way to create a function or functions that utilize a generic type argument and have a default value of null?

edit

One way to create a function with a generic type argument and a default value of null is:

function myFunction<T = null>(param: T = null): T {
  // Function code here
  return param;
}

In this example, the T parameter is a generic type argument with a default value of null. The param parameter is of type T and has a default value of null. The function code can use T as needed.

Another way to implement the same thing in TypeScript is by using Partial<T>:

function myFunction<T>(param: Partial<T> = {}): T {
  // Function code here
  return param as T;
}

This implementation allows the param argument to be an object that is a partial implementation of the T interface. The default value is an empty object {} which satisfies the Partial<T> type. The function code can use T as needed, and the return value is cast to type T.