What are immutable objects in TypeScript?

What are immutable objects in TypeScript?

Immutable objects are objects whose state cannot be modified after they are created. In TypeScript, you can create them using the readonly modifier.

Can you give me an example of how to create an immutable object?

Sure! Here's a simple example:

interface User {
  readonly id: number;
  readonly name: string;
}

const user: User = { id: 1, name: 'Alice' };
// user.id = 2; // This will cause an error because 'id' is readonly.

What are the benefits of using immutable objects?

Using immutable objects can help prevent unintended side effects, make your code easier to reason about, and improve performance in certain scenarios, especially in functional programming.

Are there any libraries that help with immutable data structures in TypeScript?

Yes, libraries like Immutable.js and Immer provide powerful tools for working with immutable data structures in TypeScript.