Partial and Required

The Partial type produces a new object type where all properties are optional, and Required produces an object type where all properties are required.

The Partial<T> specification is often used when working with a subset of an object's properties. In the example below, a simple updateUser function allows a partial set of user properties to be updated.

We can combine Partial and Required to build a type where some keys are optional, and others are required. Suppose we want to store all color definitions properties in a single Color interface: