Why is React Hook Form better than other forms? (2024)

Bigscal Technologies

Re-render isolated components:

With React Hook Form, you can isolate a component and avoid having other components re-render. Using this feature, other child components won’t be rendered in an unwanted manner which will improve performance. However, libraries like Formik and Redux-Form also re-render the other child components along with the form component.

Reducing rendering:

Besides isolating the component, it restricts its form rendering to events like onChange,onBlur, etc.

Faster mounting process:

It is approximately 13% quicker than Formik and 25% faster than Redux-Form to mount. Other libraries are slower at inserting the DOM elements into the form’s tree, so this library will render faster than other libraries.

Enter Subscription Changes:

It allows you to subscribe to each input component without going through the there-rendering of each component inside the form component.

Typescript Compatibility:

It is constructed with TypeScript and can define a FormData type to support form values.

Less Code to Maintain:

There are fewer bugs when there is less code! The useForm() hook is provided by the React Hook Form and consists of the handle submit, register, and errors methods and props. They’d take care of the submit events, register the input via refs, and display any mistakes. However, you must create your custom handlers for events and validations in the other two libraries.

The basic concept of all three libs is to make the building of forms as easy as possible, but there are some important differences between the three. Designed for uncontrolled inputs, react-hook-form strives to provide you with the best performance and smallest amount of re-rendering. Furthermore, react-hook-form is built with React Hooks and utilized as a hook, which means you do not have to import any components. These are some of the detailed differences:

Why is React Hook Form better than other forms? (3)

npm install react-hook-form

A useForm hook is provided by the react-hook-form library, which allows us to work with forms.

You can import the useForm hook like this:

import { useForm } from ‘react-hook-form’;

The useForm hook is used as follows:

const { register, handleSubmit, errors } = useForm();
Here,

Register fields:-

Using the, one of the key concepts is registering your uncontrolled component in the hook. This will make its value available for form validation and submission.

Handle Submit:-

When the form is submitted, we can call handleSubmit.

Errors:-

If any validation errors occurred, they will be in the errors.

Apply validation:

It aligns with the existing HTML standard for form validation, making form validation easy.

Here is a list of the validation rules that are supported:

required
min
max
minLength
maxLength
pattern
validate

Code:

import React from "react";
import ReactDOM from "react-dom";
import { useForm } from "react-hook-form";
import "./styles.css";function App() {
 const {
 register,
 handleSubmit,
 watch,
 formState: { errors }
} = useForm();const onSubmit = (data) => {
 alert(JSON.stringify(data));
};// your form submit function which will invoke after successful validation
 console.log(watch("example"));// you can watch individual input by pass the name of the input
return (
 <form onSubmit={handleSubmit(onSubmit)}>
 <label>First Name</label>
 <input
 {...register("firstName", {
 required: true,
 maxLength: 20,
 pattern: /^[A-Za-z]+$/i
 })}
/>
 {errors?.firstName?.type === "required" && <p>This field is required</p>}
 {errors?.firstName?.type === "maxLength" && (
 <p>First name cannot exceed 20 characters</p>
)}
 {errors?.firstName?.type === "pattern" && (
 <p>Alphabetical characters only</p>
)}
 <label>Laste Name</label>
 <input {...register("lastName", { pattern: /^[A-Za-z]+$/i })} />
 {errors?.lastName?.type === "pattern" && (
 <p>Alphabetical characters only</p>
)}
 <label>Age</label>a
 <input {...register("age", { min: 18, max: 99 })} />
 {errors.age && (
 <p>You Must be older then 18 and younger then 99 years old</p>
)}
 <input type="submit" />
 </form>
);
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

Why is React Hook Form better than other forms? (4)

Why is React Hook Form better than other forms? (5)

Why is React Hook Form better than other forms? (6)

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This article was first published by Smit Kanpara here.
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