What does the following code demonstrate? function merge(a: T, b: U): T & U { return { …a, …b }; }

Question

TypeScript Associate — Hard

What does the following code demonstrate? function merge(a: T, b: U): T & U { return { …a, …b }; }

Accepted Answer

The code demonstrates a generic function that merges two types, T and U, into an intersection type. This means the resulting type will have all properties from both T and U, ensuring full type safety.