Solving the redux-toolkit Error: "A non-serializable value was detected in the state"

Learn how to solve the common error in `redux-toolkit` related to non-serializable values detected in state and understand the importance of plain JavaScript objects in React applications.
---
This video is based on the question https://stackoverflow.com/q/72281545/ asked by the user 'Francesco Bonizzi' ( https://stackoverflow.com/u/1090403/ ) and on the answer https://stackoverflow.com/a/72282119/ provided by the user 'markerikson' ( https://stackoverflow.com/u/62937/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: react-native redux-toolkit: a non-serializable value was detected in the state, but my object is serializable

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Tackling the redux-toolkit Error: A Non-Serializable Value Detected in the State

When working with redux-toolkit in a React Native application, you might encounter a frustrating error: "A non-serializable value was detected in the state." This issue often arises unexpectedly, especially after migrating from an older version of Redux. In this guide, we'll break down this error and provide a straightforward solution to help you get your application back on track.

Understanding the Error

The error typically occurs when you're trying to store a complex object in your Redux state, particularly if that object is an instance of a class. In your case, the error message specified that a CurrentUserSessionData class instance was detected, which Redux cannot serialize properly.

Why Serialization Matters

Serialization is the process of converting an object into a format that can be easily stored and transferred. Redux relies on serializable state to ensure features like time travel debugging and state persistence work correctly. Therefore, non-serializable values, such as class instances or functions, should be avoided in the Redux state.

The Solution

To resolve the error you've encountered, you need to replace the class instance with a plain JavaScript object. This change ensures that Redux can serialize the state correctly. Follow these steps to modify your code:

Step 1: Modify the Initial State

Instead of initializing your state with a class instance, use a plain object. Change your line of code from this:

[[See Video to Reveal this Text or Code Snippet]]

to:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the Reducer

With the initial state now being a plain object, ensure your reducer logic is designed to handle this structure effectively. Your extraReducers section in the slice will remain unchanged if it correctly handles the payloads that you dispatch.

Step 3: Simplifying Store Setup (Optional)

You may have noticed that you explicitly used combineReducers. While this approach works, it is unnecessary because configureStore can automatically combine your reducers for you. You can simply create your store like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By avoiding complex objects and class instances in your Redux state, you can prevent serialization errors and create a more efficient state management solution. Remember, Redux is designed to work best with plain JavaScript objects. If you encounter similar errors in the future, check for non-serializable values.

Final Thoughts

Don't overlook the importance of serialization when working with Redux. Ensuring your state contains simple, serializable structures will enhance your application's stability and keep implementation errors at bay. If you continue to have questions or encounter issues, feel free to reach out to the community or refer back to this guide.

Whether you're debugging or just getting started with redux-toolkit, keeping your state clean and straightforward will always pay off in smoother development experiences!

Видео Solving the redux-toolkit Error: "A non-serializable value was detected in the state" канала vlogize