✨react-incrementor🎄

Component to build simple, flexible, and accessible incrementor components

The problem

You want an incrementor component that's simple and gives you complete control over rendering and state.

This solution

This follows the controlled prop pattern and render prop pattern to expose an API that renders nothing and simply encapsulates the logic of a incrementor component.

Table of Contents

• Installation
• Usage
• Props:
  • defaultValue
  • value
  • onChange
  • render
• Inspiration
• LICENSE

Installation

This module is distributed via npm, which is bundled with node, and should be installed as one of your project's dependencies:

npm install --save react-incrementor

This package also depends on react and prop-types. Please make sure you have those installed as well.

Usage

import React from 'react';
import { render } from 'react-dom';

import Incrementor from 'react-incrementor';

function BasicIncrementor() {
  return (
    <Incrementor
      render={({ value, getDecrementerProps, getIncrementerProps }) => {
        return (
          <div>
            <div>
              <span>{value}</span>
            </div>

            <div>
              <button {...getDecrementerProps()}>Minus 1</button>
              <button {...getIncrementerProps()}>Plus 1</button>
            </div>
          </div>
        );
      }}
    />
  );
}

render(<BasicIncrementor />, document.getElementById('root'));

react-incrementor is the only component. It doesn't render anything itself, it just calls the render function and renders that.

Props:

defaultValue

number | defaults to 0

The default value state.

value

number | control prop

react-incrementor manages its own state internally and calls your onChange handler whenever the value state changes. Pass the value state as a prop and that state becomes controlled. It is your responsibility to keep the value updated by re-rendering the component.

onChange

function(value: number) | optional

Called at interaction with the incrementor

render

function({}) | required

This is called with an object that exposes the public API of this component.

The function is passed as the render prop: <Incrementor render={(value) => {/* awesome code */}} />

property	category	type	description
value	state	boolean	The current value state of the incrementor
getIncrementerProps	prop getter	function(props: object)	returns the props you should apply to the incrementer button element you render. Includes aria- attributes
getDecrementerProps	prop getter	function(props: object)	returns the props you should apply to the decrementer button element you render. Includes aria- attributes

Inspiration

This was build as a learning exercise for the controlled prop pattern and render prop pattern. It is heavily influenced by Kent C. Dodds's react-toggled component

LICENSE

MIT