Resolving the useForm Error Issues with React Hook Form and Zod in T3 Apps

Discover how to fix the issue of `useForm` not returning any errors in formState with React Hook Form and Zod in T3 apps. Learn best practices for form handling!
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Solving the useForm Issue in React Hook Form with Zod and T3 Applications

Building applications with modern frameworks and libraries like T3, React Hook Form, and Zod can sometimes lead to unexpected challenges, especially when it comes to handling forms. One common issue developers encounter is getting useForm to return errors in the formState. In this post, we’ll address this problem, explore the setup involved, and offer a clear solution.

The Problem

Example of the Form Setup

Here’s a simplified version of how your form and schema might look:

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

Here, you defined a schema using Zod to validate fields title and description, and you utilized the useForm hook to manage form validation and submission. However, this setup results in issues as described.

The Solution

Identifying the Culprit: The Use of void

Why It Matters:

void Keyword: When placed before handleSubmit, it signals that the function’s intention is to not return any value. This can inadvertently disrupt the form’s ability to handle potential asynchronous operations that should set the errors properly in formState.

How to Fix It

To resolve the issue of the form not capturing errors, simply remove the void keyword from the onSubmit handler:

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

Testing the Changes

After making this change, test your form again:

Enter invalid input in the required fields.

Attempt to submit the form.

Check the console for any logged error messages regarding the title and description fields.

Conclusion

In conclusion, when working with React Hook Form and Zod in your T3 applications, understanding how the useForm hook operates and how to manage promises properly is essential for effective form handling. Removing the void keyword from your handleSubmit can significantly impact the behavior of your form, ensuring that it returns validation errors as expected. Happy coding!