What are the best practices for using arrays in React?

What are the best practices for using arrays in React?

When using arrays in React, it's important to ensure that you use keys for list items, avoid mutating the state directly, and utilize methods like map, filter, and reduce effectively.

Can you explain why using keys is important?

Keys help React identify which items have changed, are added, or are removed. This improves performance and helps maintain component state.

What should I avoid when working with arrays?

Avoid directly mutating the array state. Instead, use methods that return new arrays, like spread operator or array methods.

How can I optimize rendering of large arrays?

You can optimize rendering by using techniques like virtualization, where only a portion of the array is rendered at a time, or memoization to prevent unnecessary re-renders.