Solving the Issue: Redux Toolkit Doesn't Dispatch Async Thunk in Typescript

Learn how to resolve the issue of Redux Toolkit not dispatching async thunks in TypeScript. This guide covers the necessary setups and solutions for efficient state management.
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Solving the Issue: Redux Toolkit Doesn't Dispatch Async Thunk in Typescript

Using Redux Toolkit with TypeScript can sometimes lead to challenges, especially when dealing with async calls for operations like user authentication. If you're encountering an error that states, "Argument of type 'AsyncThunkAction ... ' is not assignable to parameter of type 'AnyAction'," you are not alone! In this guide, we'll explore the potential reasons for this error and how to resolve it effectively.

Understanding the Error

This error typically arises when TypeScript is unable to recognize the type of the async thunk action you're trying to dispatch. It often occurs due to the generic types not being adequately defined for your async thunk and the dispatch function. To resolve this, we'll need to ensure that our createAsyncThunk function and the dispatch mechanisms are correctly set up.

Step-by-Step Solution

Let's break down the solution into clear, organized sections.

1. Define the Async Thunk with Correct Types

When using createAsyncThunk, you must specify the return type and argument types in its generic. Here's how to adjust your UserLogin function:

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

2. Create Typed Dispatch and Selector Hooks

Next, you will need to create a custom hook for dispatching actions and allow TypeScript to infer types correctly. Here’s how to set it up:

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

3. Configure the Store Correctly

Ensure your main reducer file is properly configured with the types. This step is crucial for leveraging TypeScript throughout your Redux store. Below is a comprehensive way to set it up:

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

4. Update Your Component

Lastly, ensure that your Login component correctly uses the new useAppDispatch:

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

Conclusion

By following these steps, you should be able to resolve the issue where your async thunk is not dispatching as expected in Redux Toolkit with TypeScript. Ensuring that you've defined types correctly in your createAsyncThunk, along with setting up typed hooks for dispatch and selector, can help prevent type-related errors.

If you encounter further issues, double-check your type definitions and ensure all necessary imports are included.

Happy coding!