What are immutable data structures in JavaScript?

What are immutable data structures in JavaScript?

Immutable data structures are data types that cannot be modified after they are created. In JavaScript, this means that once you create an object or an array, you cannot change its content directly.

Why would I want to use immutable data structures?

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

Can you give me an example of an immutable data structure in JavaScript?

Sure! A common example is using the Object.freeze() method, which prevents any changes to an object. For instance: const obj = Object.freeze({ name: 'Alice' });.

Are there libraries that help with immutable data structures?

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