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+---
+title: "Community Round-up #4"
+layout: post
+author: Vjeux
+---
+
+React reconciliation process appears to be very well suited to implement a text editor with a live preview as people at Khan Academy show us.
+
+## Khan Academy
+
+[Ben Kamens](http://bjk5.com/) explains how [Ben Alpert](http://benalpert.com/) and [Joel Burget](http://joelburget.com/) are promoting React inside of [Khan Academy](https://www.khanacademy.org/). They now have three projects in the works using React.
+
+> Recently two Khan Academy devs dropped into our team chat and said they were gonna use React to write a new feature. They even hinted that we may want to adopt it product-wide.
+>
+> "The library is only a week old. It's a brand new way of thinking about things. We're the first to use it outside of Facebook. Heck, even the React devs were surprised to hear we're using this in production!!!"
+>
+> [Read the full post...](http://bjk5.com/post/53742233351/getting-your-team-to-adopt-new-technology)
+
+The best part is the demo of how React reconciliation process makes live editing more user-friendly.
+
+> Our renderer, post-React, is on the left. A typical math editor's preview is on the right.
+> [](http://bjk5.com/post/53742233351/getting-your-team-to-adopt-new-technology)
+
+## React Snippets
+
+Over the past several weeks, members of our team, [Pete Hunt](http://www.petehunt.net/) and [Paul O'Shannessy](http://zpao.com/), answered many questions that were asked in the [React group](https://groups.google.com/forum/#!forum/reactjs). They give a good overview of how to integrate React with other libraries and APIs through the use of [Mixins](/react/docs/mixins.html) and [Lifecycle Methods](/react/docs/advanced-components.html).
+
+> [Listening Scroll Event](https://groups.google.com/forum/#!topic/reactjs/l6PnP8qbofk)
+>
+> * [JSFiddle](http://jsfiddle.net/aabeL/1/): Basically I've given you two mixins. The first lets you react to global scroll events. The second is, IMO, much more useful: it gives you scroll start and scroll end events, which you can use with setState() to create components that react based on whether the user is scrolling or not.
+>
+> [Fade-in Transition](https://groups.google.com/forum/#!topic/reactjs/RVAY_eQmdpo)
+>
+> * [JSFiddle](http://jsfiddle.net/ufe8k/1/): Creating a new `` component and using jQuery `.fadeIn()` function on the DOM node.
+> * [JSFiddle](http://jsfiddle.net/R8f5L/5/): Using CSS transition instead.
+>
+> [Socket.IO Integration](https://groups.google.com/forum/#!topic/reactjs/pyUZBRWcHB4)
+>
+> * [Gist](https://gist.github.com/zpao/5686416): The big thing to notice is that my component is pretty dumb (it doesn't have to be but that's how I chose to model it). All it does is render itself based on the props that are passed in. renderOrUpdate is where the "magic" happens.
+> * [Gist](https://gist.github.com/petehunt/5687230): This example is doing everything -- including the IO -- inside of a single React component.
+> * [Gist](https://gist.github.com/petehunt/5687276): One pattern that we use at Instagram a lot is to employ separation of concerns and consolidate I/O and state into components higher in the hierarchy to keep the rest of the components mostly stateless and purely display.
+>
+> [Sortable jQuery Plugin Integration](https://groups.google.com/forum/#!topic/reactjs/mHfBGI3Qwz4)
+>
+> * [JSFiddle](http://jsfiddle.net/LQxy7/): Your React component simply render empty divs, and then in componentDidMount() you call React.renderComponent() on each of those divs to set up a new root React tree. Be sure to explicitly unmountAndReleaseReactRootNode() for each component in componentWillUnmount().
+
+## Introduction to React Screencast
+
+[Pete Hunt](http://www.petehunt.net/) recorded himself implementing a simple `
](http://bjk5.com/post/53742233351/getting-your-team-to-adopt-new-technology)