Unlock the Power of Immer 7.0: A Game-Changer for Immutable State in JavaScript
Are you tired of dealing with the complexities of immutable state in JavaScript? Do you wish there was a more convenient way to manage your state without sacrificing the benefits of immutability? Look no further than Immer, a revolutionary package that’s changing the game for JavaScript developers.
What is Immer?
Immer is a tiny yet powerful package that allows you to work with immutable state in a more efficient and convenient way. By creating a draft state that’s a proxy of your current state, Immer enables you to make changes to your state without mutating the original object. This approach ensures that your state remains immutable, while also providing a seamless development experience.
A Working Demo
To see Immer in action, let’s take a look at a simple demo. First, upgrade to the latest version of Immer (currently 7.0.5). Then, create a JavaScript file and paste in the following code:
“`
import { produce } from ‘immer’;
const baseState = { a: 1, b: 2 };
const nextState = produce(baseState, draft => {
draft.a = 2;
draft.b = 3;
});
“`
As you can see, the baseState remains untouched, while the nextState is a new, immutable tree that reflects all the changes made to the draftState.
What’s New in Immer 7.0?
The latest release of Immer brings a host of exciting innovations, optimizations, and breaking changes. Let’s dive into the top 5 key updates:
1. Introducing the current Method
Immer now exposes a named export, current, which creates a copy of the current state of the draft. This utility is perfect for debugging, as it provides a snapshot of the current state without freezing the object.
2. Consistent Handling of Getters and Setters
In Immer 7.0, owned getters are now involved in the copy process, just like Object.assign would otherwise be. This means you can work with classes and Vue or React without encountering errors.
3. No More Nondraftable Objects
Immer 7.0 no longer accepts nondraftable objects as the first argument. This change ensures that only JSON-serializable objects are supported, making development more predictable and efficient.
4. original Can Only Be Called on Drafts
The original API now throws an error if called on objects that cannot be proxied. This change provides a more robust development experience, ensuring that you’re always working with proxy objects.
5. Array Patches Computation
The patches for arrays are now computed differently, fixing various scenarios where they were incorrect. This update ensures that Immer provides optimal performance and accuracy when working with arrays.
Take Your Development to the Next Level
With Immer 7.0, you can unlock the full potential of immutable state in JavaScript. By leveraging these powerful new features and updates, you can build more efficient, scalable, and maintainable applications. So why wait? Start exploring Immer today and discover a better way to manage your state!