React Form Submission Delay When Using useEffect and setTimeout
I'm trying to implement I've been struggling with this for a few days now and could really use some help. I'm experiencing a strange delay when submitting my form in a React application. I'm using React 18 with functional components and hooks. When I try to submit the form, I have a `useEffect` that triggers a `setTimeout` function to simulate a delay for processing the form data. However, it seems that the form submission is being delayed indefinitely, and I even receive an behavior about the form being submitted multiple times. Here's a simplified version of my code: ```javascript import React, { useState, useEffect } from 'react'; const MyForm = () => { const [formData, setFormData] = useState({ name: '', email: '' }); const [isSubmitting, setIsSubmitting] = useState(false); useEffect(() => { if (isSubmitting) { const timer = setTimeout(() => { console.log('Form submitted!', formData); // Simulate form submission setIsSubmitting(false); }, 3000); return () => clearTimeout(timer); } }, [isSubmitting, formData]); const handleChange = (e) => { const { name, value } = e.target; setFormData({ ...formData, [name]: value }); }; const handleSubmit = (e) => { e.preventDefault(); setIsSubmitting(true); // This is where I suspect the question starts... }; return ( <form onSubmit={handleSubmit}> <input name="name" value={formData.name} onChange={handleChange} placeholder="Name" required /> <input name="email" value={formData.email} onChange={handleChange} placeholder="Email" required /> <button type="submit">Submit</button> {isSubmitting && <p>Submitting...</p>} </form> ); }; export default MyForm; ``` The scenario I'm working with seems to be that when I submit the form, the `setIsSubmitting` state is set to `true`, triggering the `useEffect`, but the form doesn't seem to finish processing before I can submit it again, causing potential multiple submissions. Additionally, I'm getting an behavior in the console stating `Warning: need to perform a React state update on an unmounted component` if I navigate away before the timeout completes. How can I resolve the submission delay and handle the form submission without errors? I'm working on a API that needs to handle this.