Fun React

Fun React is a React framework.

Why?

Because I love functional programming and ELM, but I can only use JS in work.

Introduction

If you know ELM:

Great! Fun React is perfect for you. Because it basically mimic almost everything of ELM 0.17. I bet you can know how to use Fun React right after check the following example.

If you are using Redux:

The overall concept is the same: the state reducer. The main differences are:

1. We call reducers as update functions
2. We use simple type system to replace redux action
3. We use program instead of <Provider />
4. There is no connect.
   • For data, we encourage to pass data all the way down.
   • For event, we use very simple event system, there is only two function need to know:
     • event: event declaration
     • link: event binding between parent and children

If you are using Cycle React:

TODO

Installation

npm install --save fun-react cycle-react react rx

Example

To run example

cd examples/__the_example__
npm install
npm start

then open http://localhost:8080 in browser.

Basic counter

import React from 'react'
import ReactDOM from 'react-dom'
import {
  createProgram,
  fromSimpleInit,
  fromSimpleUpdate,
  createTypes,
  caseOf,
  createView
} from 'fun-react'
 
// 1. define message types by function createTypes
const Msg = createTypes('INC', 'DEC')
 
// 2. define init data
const init = 0
 
// 3. define update function
const update = caseOf({
  INC: (_, count) => count + 1,
  DEC: (_, count) => count - 1
})
 
// 4. define view by function createView
const Counter = createView('Counter', ({model}, {event}) => (
  <div>
    <h1>Count: {model}</h1>
    <button onClick={event(Msg.INC)}>INC</button>
    <button onClick={event(Msg.DEC)}>DEC</button>
  </div>
))
 
// 5. compose program by the defined `init`, `update`, `view`
const Program = createProgram({
  init: fromSimpleInit(init),
  update: fromSimpleUpdate(update),
  view: Counter,
  inputs: () => []
})
 
// 6. mount the Program to actual DOM
const rootEl = document.getElementById('app')
ReactDOM.render(<Program />, rootEl)

Nested counter

TODO

Use with vanilla React

TODO

Use with flowtype

TODO

Learn more

TODO

Philosophy

The name imply the philosophy. So why name it Fun React:

1. We treat react element as a functor of event and the virtual dom is the context of the functor, so Fun React means: Functor React.
2. It is fun.

TODO explain what is Functor, and why can react element be a functor

TODO

• restructure examples
  • nested counter
  • todo list
  • cycle interoperable
  • react interoperable
• write doc
  • README
  • API document
  • the config options
• add jsbin env
• add test
• Try to upgrade to rx 5 or annotate rx 4

Contributers

• rayshih: that's me
• wuct: https://github.com/wuct