⚛️ 💼 React Form

React hooks for managing form state and lifecycle

Intro

React Form is currently in alpha! This means:

The existing API is not stable. Expect major changes/additions as minor and patch releases while use-cases evolve.
It is not recommended for mission critical production code.

Table of Contents

Installation
Quick Example

Installation

$ yarn add react-form
# or
$ npm i react-form --save

Quick Start

This will render a very basic form:

import React from 'react'
import { useForm, useField } from 'react-form'

// Build an input field
const InputField = React.forwardRef(function TextField(
  { field, ...rest },
  ref
) {
  // Use the useField hook with form props to access form state
  const {
    field: { setValue, value, setTouched, error, touched }
  } = useField(field)

  // Build your form input
  return (
    <>
      <input
        ref={ref}
        // Use setValue to update form values
        onChange={e => setValue(e.target.value)}
        // Use setTouched to update form touch state
        onBlur={() => setTouched(true)}
        value={value || ''}
        {...rest}
      />
      {
        // Use touched and error state to show errors
        touched && error ? <em>{error}</em> : null
      }
    </>
  )
})

function MyForm() {
  // Pass default values (be sure to memoize any options used)
  const defaultValues = React.useMemo(
    () => ({
      foo: 'hello',
      bar: {
        baz: 'world'
      }
    }),
    []
  )

  // Use the useForm hook to create a form instance
  const { Form } = useForm({
    // Pass the default values
    defualtValues,
    // Use a validate function
    validate: values => ({
      foo: !values.foo && 'Foo is required',
      bar: {
        baz: !values.bar.baz && 'Baz is required'
      }
    })
    // Handle form submission
    onSubmit: values => {
      console.log('These are the values:', values)
    }
  })

  return (
    // Use the built-in Form component provided by the hook
    // (or optionally construct your own with the `handleSubmit` function)
    <Form>
      <InputField field="foo" />
      <InputField field="bar" />
      <button type="submit">Submit</button>
    </Form>
  )
}

Documentation

Complete documentation is coming soon.

Any sparse documentation available in this Readme is being progressively improved as the API evolves.

API

React Charts exposes these top-level exports:

useForm - The primary hook for creating a form.
useField - A hook for utilizing form state and lifecycle on the field level.

madhusinha/react-form

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