What does a mapped type’s ‘as’ clause enable that wasn’t possible with basic mapped types?

Question

TypeScript Professional — Medium

What does a mapped type’s ‘as’ clause enable that wasn’t possible with basic mapped types?

Accepted Answer

The 'as' clause in a mapped type allows for key remapping, which means transforming, filtering, or renaming keys in the output. This is achieved using template literals or conditional types, providing more flexibility in defining the structure of the mapped type.