What are intersection types in TypeScript?

What are intersection types in TypeScript?

Intersection types in TypeScript allow you to combine multiple types into one. This means a variable can hold values that satisfy multiple type constraints.

Can you give me an example of how to use intersection types?

Sure! Here's an example:

interface A {
  a: number;
}

interface B {
  b: string;
}

type C = A & B;

const example: C = {
  a: 1,
  b: 'hello'
};

In this case, C is an intersection of A and B, so example must have properties from both.

What are the benefits of using intersection types?

Using intersection types helps in creating more flexible and reusable code. It allows you to compose types and ensures that objects conform to multiple interfaces, enhancing type safety.

Are there any limitations to intersection types?

Yes, one limitation is that if two types have properties with the same name but different types, it can lead to conflicts. TypeScript will require that property to be of a type that satisfies both.