Immer: Write Mutable Code for Immutable State
Immer lets you write simple, mutable-style code to produce an immutable next state. It's essential in Redux or with React's useState to avoid complex spread operators for deep updates. The footgun: mutations are only safe inside Immer's `produce` function.
Immer lets you write simple, mutable-style code to produce an immutable next state, like having a personal assistant for your data. You get a temporary `draft` of your state, modify it directly, and Immer handles the complex copying. This is a game-changer for managing complex state in React or Redux. Instead of manually spreading objects at every level, you just write `draft.user.active = true`. The footgun: this magic is confined to Immer's `produce` function; direct mutation outside it still breaks immutability.
Read the original → immerjs.github.io
- #state management
- #react
- #immutability
- #javascript
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