What are some examples of Yup schema validation?

What are some examples of Yup schema validation?

Yup is a JavaScript schema builder for value parsing and validation. Here are a few examples:

1. String Validation:

   const schema = Yup.string().required('This field is required.');
   

2. Number Validation:

   const schema = Yup.number().min(1, 'Must be greater than or equal to 1');
   

3. Email Validation:

   const schema = Yup.string().email('Invalid email format').required('Email is required.');
   

Would you like to see more examples or specific use cases?

Can you show me a complex example with nested objects?

Sure! Here's a complex example with nested objects:

const schema = Yup.object().shape({
  user: Yup.object().shape({
    name: Yup.string().required('Name is required'),
    age: Yup.number().min(18, 'Must be at least 18 years old'),
    email: Yup.string().email('Invalid email format').required('Email is required'),
  }),
  preferences: Yup.object().shape({
    newsletter: Yup.boolean(),
    notifications: Yup.boolean().required('Notification preference is required'),
  }),
});

This schema validates a user object with nested preferences. Would you like to know how to validate arrays?

Yes, how do I validate an array of items?

To validate an array of items, you can use the Yup.array() method. Here's an example:

const schema = Yup.object().shape({
  tags: Yup.array()
    .of(Yup.string().required('Tag is required'))
    .min(1, 'At least one tag is required'),
});

This schema ensures that the tags field is an array of strings, with at least one tag required. Do you have any other questions about Yup?