Resolving the Invalid Hook Call Error When Using useQuery with React Hook Form

Learn how to fix the `Invalid Hook Call` error in React when using `useQuery` from React Query alongside React Hook Form. This guide provides a step-by-step guide for a smooth implementation.
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Navigating the Invalid Hook Call Error with React Query and React Hook Form

When building applications with React, utilizing hooks can sometimes lead to confusing errors, one of which is the Invalid Hook Call error. This error often surfaces when you try to use a hook outside the appropriate function component context. If you're encountering this issue while working with React Query's useQuery and React Hook Form, you’re not alone. In this guide, we will dive deep into understanding the problem and how to resolve it effectively.

Understanding the Problem

You might be getting an error message that looks something like this:

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

This error typically indicates that you're trying to invoke a hook (useQuery in this case) from a function that is not directly part of a React component's body, which is a violation of React's rules for hooks.

The Code Example

In this example, we have a Sign In form set up using React Hook Form, and you're trying to fetch user data through a useQuery call from inside a function called fetchUser. This is where the issue arises.

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

When you call the fetchUser function in your onSubmit callback, it triggers the hook call outside of the component body, leading to the error mentioned above.

Providing the Solution

To resolve this issue, you can follow these steps:

Step 1: Create a Custom Hook

Rename your fetchUser function to useUser, to follow React’s best practices for naming hooks. This will also clarify that it is a hook:

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

Step 2: Modify the Sign In Component

Update your SignInView component to utilize the useUser hook correctly. You’ll use the watch method from React Hook Form to monitor the input and utilize React Query’s refetch method to trigger the API call manually:

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

Step 3: Form Implementation

Here’s how you could structure your form using React Bootstrap components alongside React Hook Form:

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

Conclusion

By restructuring how you handle useQuery in conjunction with React Hook Form, you can prevent the Invalid Hook Call error effectively. Remember, React hooks like useQuery need to be called directly within the functional body of a component to maintain proper state and lifecycle.

Now, you can proceed with developing a seamless user sign-in experience without running into hook-related issues! Happy coding!