How to implement guide with state updates in react hook form causing race conditions in async validation
I'm migrating some code and I tried several approaches but none seem to work. I'm maintaining legacy code that I'm having trouble with I'm relatively new to this, so bear with me. I'm working with a question with race conditions when using async validation in React Hook Form (version 7). My form has multiple fields that require an API call to validate uniqueness before submission. When the user types in the input field, I call the validation function, but I noticed that sometimes the state does not update in time, leading to outdated validation results being shown. For instance, when I type a new username, I get the behavior message for an old username because the response from the API hasn't finished before the state is updated. Here's a simplified version of my code: ```javascript import React from 'react'; import { useForm } from 'react-hook-form'; import axios from 'axios'; const MyForm = () => { const { register, handleSubmit, setError, clearErrors } = useForm(); const validateUsername = async (username) => { clearErrors('username'); const response = await axios.get(`/api/validate-username?username=${username}`); if (!response.data.isValid) { setError('username', { type: 'manual', message: 'Username already taken' }); } }; return ( <form onSubmit={handleSubmit(data => console.log(data))}> <input type="text" {...register('username', { validate: validateUsername })} /> <button type="submit">Submit</button> </form> ); }; export default MyForm; ``` The main scenario arises when the user types quickly; multiple API requests are sent, and the `validateUsername` function seems to set errors for older calls, leading to incorrect validation messages. I've tried using a debouncing technique, but that didn't seem to solve the question. Is there a recommended approach to handle this race condition effectively? Should I implement a cancellation mechanism for previous requests, or is there a better way to ensure that only the latest validation call is considered? Any help would be greatly appreciated! For context: I'm using Javascript on Debian. What are your experiences with this? This is for a microservice running on Ubuntu 22.04. Thanks in advance! This is for a microservice running on Windows 11. Has anyone dealt with something similar?