Gain insights into creating robust React forms with Formik. Delve into managing form states, validation with Yup, and handling submissions to build scalable, efficient forms.

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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

# Issues with creating forms in React
Let's explore some of the problems that can arise during the various stages of form development in React, particularly when dealing with larger forms.


## Managing the form state

When creating a React form the traditional way, we need to set up states to keep track of the `values` and `errors` in each of our form fields. We also need to keep track of the `touched` state so we know the input fields that have been visited. 

As the form gets bigger, we have more fields, and this increases the size of our state. This is because for each field we're tracking, at least three states—the `value` of the field, the `touched` state, and the `error` state. All of these states make the form more difficult to manage. 


## Validating form values

We used multiple `if` statements to test for different possible validation constraints of each field. More fields in our form mean more validation constraints. This means we'll have even more `if` and `nested if` statements. You can imagine how complicated our code base becomes when this happens.


## Submitting the form

If we disable the default validation behavior of our form using the `novalidate` attribute in the `<form>` tag, clicking the "Submit" button submits the form whether or not error messages are displayed. To fix this, we have to call the submission logic conditionally. We can write a condition that ensures there are no error messages in any of the fields in the state and no invalid fields. 



Learn how Formik makes it easier to create React forms.

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

Introduction to Formik

Issues with creating forms in React

Managing the form state

Validating form values