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gaearon / connect.js
Last active Sep 10, 2022
connect.js explained
View connect.js
// connect() is a function that injects Redux-related props into your component.
// You can inject data and callbacks that change that data by dispatching actions.
function connect(mapStateToProps, mapDispatchToProps) {
// It lets us inject component as the last step so people can use it as a decorator.
// Generally you don't need to worry about it.
return function (WrappedComponent) {
// It returns a component
return class extends React.Component {
render() {
return (
istarkov / 00
Last active Nov 26, 2017
How to style React components
View 00

How to style React components

If you use sass and css-modules and want to restyle some base component without changing its code. (base component already use css-modules and exposes styles property)

I know two way how to do it.

  1. Using composes css-modules operator. Just extend classes you need, then in javascript code combine both styles as {...baseStyle, ...myStyleSimple}
jlongster /
Last active Sep 11, 2021
List of immutable libraries

A lot of people mentioned other immutable JS libraries after reading my post. I thought it would be good to make a list of available ones.

There are two types of immutable libraries: simple helpers for copying JavaScript objects, and actual persistent data structure implementations. My post generally analyzed the tradeoffs between both kinds of libraries and everything applies to the below libraries in either category.

Libraries are sorted by github popularity.

Persistent Data Structures w/structural sharing

sebmarkbage /
Last active Sep 30, 2018
Global Shared [Synchronous] State

setProps - depends on reading the last reconciled props from the current reconciled state of the app, at the time of the call. It also depends on an object that doesn't necessarily need to be there outside reconciliation. This is unlike setState, which is state that needs to be there. setState is queued up and merged at the time of reconciliation. Not at the time of the call. setState has a side-effect but is not a stateful nor mutative API.

isMounted - reads the current state of the tree, which may be stale if you're in a batch or reconciliation.

getDOMNode/findDOMNode - Reads the currently flushed node. This currently relies on the state of the system and that everything has flushed at this time. We could potentially do a forced render but that would still rely on the state of the system allowing us to synchronously being able to force a rerender of the system. Note: in 0.14, refs directly to DOM node will resolve to the DOM node. This allow you to get access to a node at the time of its choos

jhorneman / async data loading in
Last active Aug 22, 2016
Thoughts on where to do async data loading in Flux
View async data loading in

Async data loading in Flux

I've been working with Flux a lot recently, and one of the questions I've been struggling with is in which part of the Flux cycle to put my asynchronous data requests.

Here are some different opinions:

The diagram

The famous Flux diagram puts them in the action creators.

The chat example

danielgtaylor / gist:0b60c2ed1f069f118562
Last active Oct 22, 2021
Moving to ES6 from CoffeeScript
View gist:0b60c2ed1f069f118562

Moving to ES6 from CoffeeScript

I fell in love with CoffeeScript a couple of years ago. Javascript has always seemed something of an interesting curiosity to me and I was happy to see the meteoric rise of Node.js, but coming from a background of Python I really preferred a cleaner syntax.

In any fast moving community it is inevitable that things will change, and so today we see a big shift toward ES6, the new version of Javascript. It incorporates a handful of the nicer features from CoffeeScript and is usable today through tools like Babel. Here are some of my thoughts and issues on moving away from CoffeeScript in favor of ES6.

While reading I suggest keeping open a tab to Babel's learning ES6 page. The examples there are great.


Holy punctuation, Batman! Say goodbye to your whitespace and hello to parenthesis, curly braces, and semicolons again. Even with the advanced ES6 syntax you'll find yourself writing a lot more punctuatio

imjasonh / markdown.css
Last active Mar 11, 2022
Render Markdown as unrendered Markdown (see
View markdown.css
* {
font-size: 12pt;
font-family: monospace;
font-weight: normal;
font-style: normal;
text-decoration: none;
color: black;
cursor: default;
View gist:a93fd88d93cbf42d4d24
var pureRender = (Component) => {
Object.assign(Component.prototype, {
shouldComponentUpdate (nextProps, nextState) {
return !shallowEqual(this.props, nextProps) ||
!shallowEqual(this.state, nextState);
module.exports = pureRender;
sebmarkbage / Enhance.js
Last active Sep 19, 2022
Higher-order Components
View Enhance.js
import { Component } from "React";
export var Enhance = ComposedComponent => class extends Component {
constructor() {
this.state = { data: null };
componentDidMount() {
this.setState({ data: 'Hello' });
render() {
View es6mixin.js
var Bar1 = base => class extends base {
var Bar2 = base => class extends base {