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

It helps the user supply the right answers to the form.

It reduces the number of error messages the form can display.

Which one is a valid reason for using reusable form components?

Which one is a valid reason for using reusable form components?

Which hook helps to hook up components to Formik?

Which hook helps to hook up components to Formik?

An object that contains the `name` field.

What does <code>useField(&quot;name&quot;)</code> return?

What is the most suitable component to use for a form field that has 35 options and allows the user to select one of them? 

What is the most suitable component to use for a form field that has 35 options and allows the user to select one of them?

`        form.setFieldValue(selectedOption.name, field.value)
`

`        form.setFieldValue(field.name, selectedOption.value)
`

`form.setValue(selectedOption.name, field.value)
`

In the `onChange` function below, we want to update the `value` of the form's field with the `value` of the `selectedOption`. Which option best completes the function?

```js
const SelectDropdown = ({ name, label, options, ...restOfProps }) => {
 return (
 <Field
 name={name}
 {...restOfProps}
 options={options}
 component={SelectField}
 />
 );
};

const SelectField = ({ options, form, field }) => {
 return (
 <Select
 options={options}
 onChange={(selectedOption) => {
 // complete this function
 }}
 // ...
 />
 );
};

```

In the <code>onChange</code> function below, we want to update the <code>value</code> of the form’s field with the <code>value</code> of the <code>selectedOption</code>. Which option best completes the function?
<pre><code class="language-js">const SelectDropdown = ({ name, label, options, ...restOfProps }) =&gt; {
 return (
 &lt;Field
 name={name}
 {...restOfProps}
 options={options}
 component={SelectField}
 /&gt;
 );
};

const SelectField = ({ options, form, field }) =&gt; {
 return (
 &lt;Select
 options={options}
 onChange={(selectedOption) =&gt; {
 // complete this function
 }}
 // ...
 /&gt;
 );
};

</code></pre>

`options.filter((option) => option.value === field.value)`

`options.find((option) => option.value === field.value)[0]`

`options.find((option) => option.value === field.value)`

`options.map((option) => option.value === field.value)`

Which expression will set the `value` of the `SelectField` component below to the object in the `options` array with a value that is the current field’s value?
```js
const SelectDropdown = ({ name, label, options, ...restOfProps }) => {
 return (
 <Field
 name={name}
 {...restOfProps}
 options={options}
 component={SelectField}
 />
 );
};

const SelectField = ({ options, form, field }) => {
 return (
 <Select
 options={options}
 value={
 // selected option
 }
 // ...
 />
 );
};

```

Which expression will set the <code>value</code> of the <code>SelectField</code> component below to the object in the <code>options</code> array with a value that is the current field’s value?
<pre><code class="language-js">const SelectDropdown = ({ name, label, options, ...restOfProps }) =&gt; {
 return (
 &lt;Field
 name={name}
 {...restOfProps}
 options={options}
 component={SelectField}
 /&gt;
 );
};

const SelectField = ({ options, form, field }) =&gt; {
 return (
 &lt;Select
 options={options}
 value={
 // selected option
 }
 // ...
 /&gt;
 );
};

</code></pre>

Which method of creating a reusable form component is more suitable for a form field that needs to update other form fields?

Which method of creating a reusable form component is more suitable for a form field that needs to update other form fields?

It helps wrap the app so that any form created is secure.

It initializes the form's state and creates a context provider that gives its children access to this state.

It's used to create a reusable form component.

It prevents the app from losing data when the page is refreshed.

What is the purpose of the `FormikWrapper` given below?
```
import {Formik} from "formik";
```



What is the purpose of the <code>FormikWrapper</code> given below?
<pre><code>import {Formik} from &quot;formik&quot;;
</code></pre>

Test yourself on creating reusable form 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

Quiz Yourself on Creating Reusable Form Components