Conditional validation with Yup and Formik

Question

Here is my validation schema:

const validationSchema = Yup.object().shape({
      person: Yup.object().shape({
        name: Yup.string().required(\'Field is         


        

Answer 1

You can conditionally add to your validation schema just like any other object:

let validationShape = {
  company: Yup.object().shape({
    name: Yup.string().required('Field is required'),
    address: Yup.string().required('Field is required'),
    email: Yup.string()
      .email('Wrong e-mail format')
      .required('Field is required')
  })
};

if (this.state.isPerson) {
  validationShape.person = Yup.object().shape({
    name: Yup.string().required('Field is required'),
    surname: Yup.string().required('Field is required'),
    middleName: Yup.string().required('Field is required'),
    email: Yup.string()
      .email('Wrong e-mail format')
      .required('Field is required');
}

const validationSchema = Yup.object().shape(validationShape);