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React Hook Form - performant, flexible and extensible form library

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# React Hook Form

Performant, flexible and extensible forms with easy-to-use validation.

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#### React Web

#### React Native

React WebReact Native

### DX

Intuitive, feature-complete API providing a seamless experience to developers when building forms.

### HTML standard

Leverage existing HTML markup and validate your forms with our constraint-based validation API.

### Super Light

Package size matters. React Hook Form is a tiny library without any dependencies.

### Performance

Minimizes the number of re-renders, minimizes validate computation, and faster mounting.

### Adoptable

Since form state is inherently local, it can be easily adopted without other dependencies.

### UX

Striving to provide the best user experience and bringing consistent validation strategies.

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# Less code. More performant

React Hook Form reduces the amount of code you need to write while removing unnecessary re-renders. Now dive in and explore with the following example:

## React Hook Form

import { useForm } from "react-hook-form";

const Example \= () \=> {

const { handleSubmit, register, formState: { errors } } \= useForm();

const onSubmit \= values \=> console.log(values);

return (

<form onSubmit\={handleSubmit(onSubmit)}\>

<input

type\="email"

{...register("email", {

required: "Required",

pattern: {

value: /^\[A\-Z0\-9.\_%+-\]+@\[A\-Z0\-9.-\]+\\.\[A\-Z\]{2,}$/i,

message: "invalid email address"

}

})}

/\>

{errors.email && errors.email.message}

<input

{...register("username", {

validate: value \=> value !== "admin" || "Nice try!"

})}

/\>

{errors.username && errors.username.message}

<button type\="submit"\>Submit</button\>

</form\>

);

};

# Isolate Re-renders

You have the ability to isolate component re-renders which leads to better performance on your page or app. The following example demonstrates this:

## React Hook Form

Child Component A

Child Component B

Child Component C

VS

## Controlled Form

Child Component A

Child Component B

Child Component C

# Subscriptions

Performance is an important aspect of user experience in terms of building forms. You will have the ability to subscribe to individual input and form State update without re-rendering the entire form.

# Faster Mounting

The following screenshots demonstrate how much faster component mounting is with React Hook Form compared to others:

## React Hook Form

- No. of mount(s): 1
- No. of committing change(s): 1
- Total time: **1800ms**

## Others

- No. of mount(s): 6
- No. of committing change(s): 1
- Total time: **2070ms**

- No. of mount(s): 17
- No. of committing change(s): 2
- Total time: **2380ms**

# Highlights

This project is getting recognized by the community and industry. It's helping more developers to build forms in React than ever.

### Javascript Rising Star

React Hook Form have matured and evolved around hooks. Simplifies a piece of React development.

### React Open Source Awards

The winner of 2020 GitNation React OS Award for the category of Productivity Booster.

### Technology Radar

The project is fortunate enough to be under the radar for the Languages & Frameworks section.

# The Community

Build and drive by the community. On a mission to make every React developer's life easier when it comes to building forms.

This is where it's at. A React form library that is both well thought out and flexible enough to get out of your way when you need it to. After fussing around with React forms for years, switching to react-hook-form feels like a superpower. Everything runs faster and my code is cleaner.

Creating a form is no more complicated while building a react application with the help of react-hook-form. Most of the time I use this package for creating a form as validation is so much simple here. It is the best form maker for me while I stop to work with formika. Very nice user interface and performance are good.

The best React form library that I have ever used while building a react app because of its utility and simplicity. It has a lot of useful tools and doesn’t require much code compared to Formik, and Redux Form. As the number of re-renders in the application is small and mounting time is less it is super smooth.

# Live Demo

The following form demonstrates form validation in action. Each column represents what has been captured in the custom hook. You can also change fields in the form by clicking the **EDIT** button.

## Example
Select...MrMrsMissDr

Yes No

Submit## or
Edit

## Watch

ⓘ Change inputs value to update watched values

{}

## Errors

ⓘ Validation errors will appear here

## Touched

ⓘ Touched fields will display here

\[\]

# Ready to get started?

Form handling doesn't have to be painful. React Hook Form will help you write less code while achieving better performance.

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