When working with nested state structures, updating deeply nested data can be cumbersome in plain Redux since it requires manually copying each level to maintain immutability. Redux Toolkit simplifies this by using Immer, allowing you to write code that looks like it mutates deeply nested objects safely.

Key Points for Nested Updates

1
Immer creates a draft version of the state that can be safely modified at any depth.
2
You can directly update nested properties using dot or bracket notation.
3
After all changes, Immer produces a new immutable state reflecting the nested updates.
4
This avoids boilerplate and ensures reducer functions remain pure and easy to maintain.

Example: Updating Nested State in Redux Toolkit

Redux Toolkit’s integration with Immer ensures even deeply nested updates are performed immutably under the hood, making complex state modifications both simple and safe.