Built-in Mapped Types
Learn how built-in mapped types such as Partial, Required, Pick, and Record work in TypeScript. This lesson helps you grasp how to modify object types by making properties optional, required, or selecting subsets, enabling you to write clearer and more maintainable advanced type definitions.
Partial
Partial<T> returns a type that has the same properties as T but all of them are optional. This is most useful when the strictNullChecks flag is enabled. Partial works on a single level, meaning it doesn’t affect nested objects. A good use case for Partial is when you need to type a function that lets you override default values of ...