Learn how to leverage Formik to create complex and straightforward forms with ease.

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This course focuses on Formik, a JavaScript library for building forms in React. The ability to handle form data is crucial in modern web development, and Formik simplifies the process by allowing you to create forms with less code. You'll learn how to leverage Formik to create complex and straightforward forms with ease.

You'll start with the basics of Formik and gradually work your way up to more advanced topics. You'll learn how to create form fields, handle validation, manage form states, and submit forms. You'll also learn how to use Formik with other popular libraries like Yup for more advanced validation scenarios. 

By the end of this course, you'll be able to create robust and scalable forms in React using Formik. You'll have a deep understanding of how to manage form states, handle form submissions, and validate user input. Data collection is a key element in information technology and will enable you to build better, more organized forms with less code.

Writing React Forms Like a Pro with Formik

We were able to display the error messages for each field by getting the message from the `formik.errors` object in real time. For example, for the "Phone" field, we display the error message using the following snippet:
```
{
  formik.errors.phone && 
    <small>{formik.errors.phone}</small>
}
```

Here, we use the short circuit operator `&&` to display the error message only when it exists. 

For those wondering why we check that it exists before displaying it (after all, if it doesn't exist, it displays nothing), the reason why we add the condition is to prevent the entire element (in this case, the `<small>` tag) from displaying. This is because, sometimes, we could style the element to have padding and border lines, and so, if the node is displayed when there is no error message, we'll always see the padding and border lines, even when there is no message.

Learn how to display error messages to the user only after they have visited a field. 

Getting Started

Managing the Form State

Validating Forms

Submitting Forms

Assessment: Formik Essentials — From Managing State to Submission

Reducing Boilerplate

Creating Reusable Form Components

Additional Concepts

Final Assessment

Project: Build a Multi-Step Checkout Form with React and Formik

Display Error Messages When Necessary