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In Redux, reducer composition with combineReducers offers a powerful way to handle complex update logic of an application. A reducer can encapsulate all the ways a part of the state is mutated because it can react to multiple types of actions.

But in some cases there is also a need for another type of factoring: often the update logic is simple (for example setting a single value), and the there are many places in the state shape where the update logic is the same.

yelouafi / Counter.jsx
Last active Oct 5, 2016
redux-saga with vanilla React
View Counter.jsx
import React, { Component } from 'react'
import { runSaga, delay } from 'redux-saga'
import { take, put, call } from 'redux-saga/effects'
// helper functions
const bindFunc = (comp, method) => (...args) => method.apply(comp, args)
const bindSaga = (comp, method) => (...args) => runSaga(method.apply(comp, args), {})
export default class Counter extends React.Component {
View do-notation.sjs
syntax seq = function (ctx) {
let monad =;
let bodyCtx =;
function next() {
let result
let n =
if(n.done) return #``
View data-driven.js
// Getter a :: () -> a
// gmap :: ((a -> b), Getter a), Getter b
function gmap(fn, getter) {
return () => fn(getter())
// gcombine2 :: ((a,b) -> c, Getter a, Getter ab) -> Getter c
function gcombine2(fn, getter1, getter2) {
yelouafi / redux-obs-tree.html
Last active May 16, 2016
Observable state tree
View redux-obs-tree.html
<!DOCTYPE html>
<title>Redux basic example</title>
<script src=""></script>
<script src="redux-dirty.js" charset="utf-8"></script>
View rawc.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>Raw DOM Nostalgia</title>
.done {
text-decoration: line-through;
View model-helpers.js
"use strict"
const assign = Object.assign
function push(arr, item) {
let newArr = (arr && arr.slice()) || []
return newArr
View rocketLauncher.html
<!DOCTYPE html>
<title>Redux rocket launcher example</title>
<script src=""></script>
<script src=""></script>
Example created to compare Redux + redux-saga implementation with
yelouafi / redux-actions-spec.js
Last active Feb 3, 2016
redux actions specs
View redux-actions-spec.js
const empty = {}
const ktrue = () => true
const contract = p => (v, field) => {
if(p(v, field))
return v
throw `Invalid value ${v} for field ${field}`
// builtin validators
View test-runSaga.js
import { createStore, applyMiddleware } from 'redux'
import sagaMiddleware, { runSaga, storeIO, take, put } from 'redux-saga'
// Sagas
You can’t perform that action at this time.