formik and yup
import React from 'react';
import { Formik, Field, Form, ErrorMessage } from 'formik';
import * as Yup from 'yup';
const SignupForm = () => {
return (
<Formik
initialValues={{ firstName: '', lastName: '', email: '' }}
validationSchema={Yup.object({
firstName: Yup.string()
.max(15, 'Must be 15 characters or less')
.required('Required'),
lastName: Yup.string()
.max(20, 'Must be 20 characters or less')
.required('Required'),
email: Yup.string().email('Invalid email address').required('Required'),
})}
onSubmit={(values, { setSubmitting }) => {
setTimeout(() => {
alert(JSON.stringify(values, null, 2));
setSubmitting(false);
}, 400);
}}
>
<Form>
<label htmlFor="firstName">First Name</label>
<Field name="firstName" type="text" />
<ErrorMessage name="firstName" />
<label htmlFor="lastName">Last Name</label>
<Field name="lastName" type="text" />
<ErrorMessage name="lastName" />
<label htmlFor="email">Email Address</label>
<Field name="email" type="email" />
<ErrorMessage name="email" />
<button type="submit">Submit</button>
</Form>
</Formik>
);
};
export default SignupForm;