pronextjs / forms-management

Form validation and posting example in the NextJS App Router

This is a Next.js project bootstrapped with create-next-app.

Getting Started

First, run the development server:

npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev

Open http://localhost:3000 with your browser to see the result.

You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.

This project uses next/font to automatically optimize and load Inter, a custom Google Font.

Learn More

To learn more about Next.js, take a look at the following resources:

• Next.js Documentation - learn about Next.js features and API.
• Learn Next.js - an interactive Next.js tutorial.

You can check out the Next.js GitHub repository - your feedback and contributions are welcome!

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Check out our Next.js deployment documentation for more details.

forms-management's Issues

Error: Manual Form Submit

Issue Title:
Error: Form Submit

Description:
After adding the useFormState hook and switching to manual form submission using formRef, I encountered issues with the functionality: time to time, I get the error (attached screenshot)

Expected Behavior:
We can workaround it using client and react-hook-form in such way:

	const form = useForm<FormValues>({
		resolver: zodResolver(schema),
		defaultValues: {
			email: '',
			password: '',
			confirmEmail: '',
		},
	});
	const {
		formState: { errors },
	} = form;

	const onSubmit = async (data: FormValues) => {
		const response = await signUpAction(data);

		if (response.error) {
			form.setError('root.serverError', {
				type: '400',
				message: response.message,
			});
		}
	};
    
      // and view (JSX)
      	{errors.root?.['serverError'] && (
		<HelperText className="my-4 text-center" variant="error">
			<b>Server Error: </b>
			{errors.root?.['serverError'].message}
		</HelperText>
	)}

But your version is elegant and much better.

Actual Behavior:
Screenshot with error attached.
It happens here

	<form
		action={formAction}
		className="flex flex-col gap-y-28"
		onSubmit={form.handleSubmit(() => formRef?.current?.submit())} // <=== Here. 
		ref={formRef}
	>

Link to place in repo https://github.com/ProNextJS/forms-management/blob/main/src/app/RegistrationForm.tsx#L95C8-L95C71
Recommendations in Error stack trace also don't work :(

Have you come across such issue?

Screenshots (if applicable):

Additional Information:
Operating System: macOS Sonoma 14.4.1
Browser/Software Version: Google Chrome Version 123.0.6312.87

file input form?

Thanks so much for the great tutorial.
Would it be possible to show an example of an input of type="file"?
My attempt give the following error:
Type '{ onChange: (...event: any[]) => void; onBlur: Noop; value: File; disabled?: boolean | undefined; name: "file"; ref: RefCallBack; placeholder: string; accept: string; type: "file"; }' is not assignable to type 'InputProps'. Types of property 'value' are incompatible. Type 'File' is not assignable to type 'string | number | readonly string[] | undefined'.

Code typo on async validation lesson

Thanks for putting this together! I’ve got my whole team working through the course this week 💪

When taking the course myself, I noticed a small typo in the lesson text of the “Implement Async Server-Side Validation” chapter:

https://www.pronextjs.dev/tutorials/forms-management-with-next-js-app-router/forms/implement-async-server-side-validation#building-a-zip-code-validator

In the following code block,

"use server";

export async function validateZipCode(zipCode: string): Promise<boolean> {
  console.log("validateZipcode on SERVER", zipCode)
  return /^/d{5}.test(zipCode) && zipCode.startsWith('9');
}

/^/d{5}.test(zipCode) should be /^\d{5}/.test(zipCode) instead. The original code causes a syntax error crash when used.

Also, validateZipcode.ts is duplicated as validateZipcode.tsx in the repository. There should be only be the .ts one, right?

Thanks again! We’re excited to put this pattern into development ✨

onSubmit fn in RegistrationForm file doesn't match video

Hey @jherr , thank you for the great tutorial about form management. I learned a ton!
I was reviewing the code attached to the lesson Implement a Server Action for Handling Form Data and I noticed that in Github the onSubmit on the <form .../> is different to what I see on the video. Maybe a typo?

What I see on your video:

But what I have on Github is:

https://github.com/ProNextJS/forms-management/blob/main/src/app/RegistrationForm.tsx#L95C6-L100C11