Question 1

How to update deeply nested state with Redux Modifiers?

Accepted Answer

Use the updateIn function with a selection path in the action payload, like selected: ['foo', 'name'], to target specific parts of state, as shown in the README example for modifying nested objects.

Question 2

Redux Modifiers vs Redux Toolkit: which should I use?

Accepted Answer

Redux Toolkit is the modern standard with built-in immutability via Immer and broader ecosystem support, while Redux Modifiers is niche for teams already using ImmutableJS. For new projects, Redux Toolkit is generally recommended due to better maintenance and features.

Question 3

Can I use Redux Modifiers without ImmutableJS?

Accepted Answer

No, it's built on top of ImmutableJS and requires it for state conversion and operations. If you're not using ImmutableJS, this library adds unnecessary dependency and complexity.

Question 4

How to convert state back to plain JavaScript in React?

Accepted Answer

Call toJS() on the state retrieved from the reducer to convert ImmutableJS structures to vanilla JavaScript objects, useful for components that need standard object access, as mentioned in the interoperability note.

Question 5

What are the performance impacts of using Redux Modifiers?

Accepted Answer

Performance depends on ImmutableJS, which can be slower for frequent updates due to structural sharing, but it ensures immutability. The library itself adds minimal overhead but requires careful handling of large state trees.

Question 6

How to write custom reducer functions with Redux Modifiers?

Accepted Answer

Define custom functions in the reducer map that use ImmutableJS APIs on state, like in the ADD_NESTED_ITEM example where state.updateIn is called with a custom function for pushing values.

redux-modifiers

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