react-component-form/README.md

<h1 align="center">react-component-form</h1>

<p align="center">
  <strong>Manage React Forms with ease.</strong>
</p>

<p align="center">
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  <a href="./LICENSE"><img src="https://img.shields.io/badge/licence-MIT-blue.svg" alt="Licence MIT"/></a>
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  <br />
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  <br />
  <a href="https://conventionalcommits.org"><img src="https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg" alt="Conventional Commits" /></a>
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  <a href="https://www.npmjs.com/package/react-component-form"><img src="https://img.shields.io/npm/v/react-component-form.svg" alt="npm version"></a>
</p>

## 📜 About

**react-component-form** is a lightweight form component for [React.js](https://reactjs.org/), it allows you to get the inputs values without state thanks to `onChange` or `onSubmit` props.

There is also a [React Hooks](https://reactjs.org/docs/hooks-intro.html) to be used in combination with the `<Form />` component to validate the data with [Ajv JSON schema validator](https://ajv.js.org/), see [advanced usage](#%EF%B8%8F-advanced-usage).

Demo: [https://divlo.github.io/react-component-form/](https://divlo.github.io/react-component-form/).

## 💾 Install

```sh
npm install --save react-component-form
```

## ⚙️ Usage

_Note : The examples use TypeScript, but obviously you can use JavaScript. Be aware that `HandleForm` is the type definition for the `onChange` and `onSubmit` props._

```tsx
import React from 'react'
import { Form } from 'react-component-form'
import type { HandleForm } from 'react-component-form'

export const Example = () => {
  const handleSubmit: HandleForm = (formData, formElement) => {
    console.log(formData) // { inputName: 'value of the input' }
    formElement.reset()
  }

  return (
    <Form onSubmit={handleSubmit}>
      <input type='text' name='inputName' />
      <button type='submit'>Submit</button>
    </Form>
  )
}
```

Basically you have access to the same props of the HTML `form` tag in React, but the onSubmit and the onChange props are differents.

Instead to get the `event` param you get `formData` and `formElement` parameters:

- `formData`: It's an object where the keys are the name of your inputs and the current value. Behind the scene, it uses the [FormData](https://developer.mozilla.org/docs/Web/API/FormData) constructor.
- `formElement`: It's the actual HTML form element in the DOM so for example you can access the `.reset()` method on a [HTMLFormElement](https://developer.mozilla.org/docs/Web/API/HTMLFormElement).

## ⚙️ Advanced Usage

This example shows how to use the `<Form />` component with `useForm` hook to validate the data with [Ajv JSON schema validator](https://ajv.js.org/).

You can see a more detailled example in the [./example](./example) folder.

```tsx
import React from 'react'
import { Form, useForm } from 'react-component-form'
import type { HandleUseFormCallback } from 'react-component-form'

const schema = {
  inputName: {
    type: 'string',
    minLength: 3,
    maxLength: 20
  }
}

export const Example = () => {
  const { errors, handleUseForm } = useForm(schema)

  const onSubmit: HandleUseFormCallback<typeof schema> = (
    formData,
    formElement
  ) => {
    console.log(formData) // { inputName: 'value of the input validated' }
    formElement.reset()
    return null
  }

  return (
    <Form onSubmit={handleUseForm(onSubmit)}>
      <input type='text' name='inputName' />
      {errors.inputName != null && <p>{errors.inputName[0].message}</p>}

      <button type='submit'>Submit</button>
    </Form>
  )
}
```

## 💡 Contributing

Anyone can help to improve the project, submit a Feature Request, a bug report or
even correct a simple spelling mistake.

The steps to contribute can be found in [CONTRIBUTING.md](./CONTRIBUTING.md).

## 📄 License

[MIT](./LICENSE)