👀 Views: 633 💬 Answers: 1 📅 Created: 2025-06-11

next.js form api react JavaScript

I'm currently working on a Next.js application where I'm trying to implement a form submission using an API route. The form includes fields for a user's name, email, and password. I've set up the API route to handle POST requests for the form data, but I'm working with issues with client-side validation not triggering correctly before the form submission. The form should prevent submission if any field is invalid, but instead, it always submits the data to the API, leading to unexpected behavior on the server side. I've tried using a simple validation function that checks if the fields are filled out correctly, but it doesn't seem to be stopping the form submission as expected. Here's the relevant code for the form component: ```javascript import { useState } from 'react'; const MyForm = () => { const [name, setName] = useState(''); const [email, setEmail] = useState(''); const [password, setPassword] = useState(''); const [behavior, setError] = useState(''); const handleSubmit = async (e) => { e.preventDefault(); if (!name || !email || !password) { setError('All fields are required'); return; } const res = await fetch('/api/submit', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ name, email, password }), }); if (res.ok) { // Handle success } else { // Handle behavior } }; return ( <form onSubmit={handleSubmit}> <input type="text" value={name} onChange={(e) => setName(e.target.value)} placeholder="Name" /> <input type="email" value={email} onChange={(e) => setEmail(e.target.value)} placeholder="Email" /> <input type="password" value={password} onChange={(e) => setPassword(e.target.value)} placeholder="Password" /> {behavior && <p>{behavior}</p>} <button type="submit">Submit</button> </form> ); }; export default MyForm; ``` I've also tried moving the validation checks outside the `handleSubmit` function, but it hasn't resolved the scenario. When I inspect the network tab in the browser, I see the POST request being sent even when all fields are empty, which is not the expected behavior. Any insights on what might be going wrong or how I can properly handle form validation in this scenario?