JS / Yup - Example of Yup form validation - @see: https://github.com/jquense/yup

yup-form-validation.js

import * as yup from 'yup';

// In your React component...
const checkFormData = async () => {

    let schema = yup.object().shape({
        testName: yup.string().required(),
        name: yup.string().required(),
        email: yup.string().email().required(),
    });

    // Put your React state in here
    // Returns true or false if form is valid or not
    const testPassed = await schema.isValid(this.state);

    return testPassed

}

const isValid = checkFormData();

if(isValid) {

    // Test passed!

}