My learning diary

react-hook-form validations

Feeling a little abashed about leaving a bug unresolved for the day, but I want a break and keep the team posted. And I also want to share what I’ve learnt. However, if you know what’s the problem with my commit, please don’t hesitate to reach out!

Back to the main learning point I’m trying to share: In the pull request above, look at the first screenshot. The first screenshot was supposed to depict a form field that has gone through the validation function despite being untouched. Based on my understanding of the mockups I was given, this was the intended behaviour.

Though, this was not a default behaviour in react-hook-form. So I had to do the following:

import { SubmitHandler, useForm } from 'react-hook-form'
  const {
    formState: { errors },
  } = useForm<TransferOwnershipInputs>({
    mode: 'onChange',
  useEffect(() => {
  }, [])

I’ve not looked into whether the current approach is the ideal approach. If I come across anything better, I’ll write about it!

As for the actual validation functions, I got to know of a shorthand through Stack Overflow. As a result, registration looked like:

{...register('email', {
  required: REQUIRED_ERROR,
  validate: (value) => isEmail(value) || INVALID_EMAIL_ERROR,

I suppose I could merge the check for required into validate, but it wouldn’t be as readable.

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