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

# Customizing the `Field` component
By default, the `Field` component renders an input field. Any props we pass to it are passed as attributes to the input field. This means we can specify the `type` of the input field, for example, by passing it to the `type` prop of `Field`.

What if we wanted to render a field that is not an input field, for example, a textarea? Or a select dropdown? Or another React component?


## Customizing using the `as` props

The `Field` component accepts an `as` prop. This can be the name of an HTML element we want to render or a custom React component. The `onChange`,  `onBlur`, `value`, and other props we specify for `Field` will be passed to this element or component. Therefore, we must use elements or components that accept these attributes. We could use HTML elements like `input` (this is the default), `select`, `textarea`, or custom React components that accept these props.

An example that uses the HTML `select` element is given below:

// renders a select dropdown
<Field name="country" as="select" className="country-dropdown">
  <option value="nigeria">Nigeria</option>
  <option value="india">India</option>
  <option value="burkinafaso">Burkina Faso</option>
</Field>

// The component above renders
<select name="country" class="country-dropdown">
  <option value="nigeria">Nigeria</option>
  <option value="india">India</option>
  <option value="burkinafaso">Burkina Faso</option>
</select>

Here is an example that uses the HTML `textarea` element.

Learn how to customize the Formik components.

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

Rendering Custom Components

Customizing the `Field` component

Customizing using the `as` props