--- title: "This week's JavaScript news, issue 220" publication: "JavaScript Weekly" issue: 220 published_at: "2015-02-20" canonical_url: "https://javascriptweekly.com/issues/220" --- JavaScript Weekly 220 This is the text that appears under the subject line bit in certain clients. ![](http://no.gd/jsw.jpg) Facebook [![\](http://no.gd/play.png)React.js Conf Round-up 2015: 20 Sessions to Watch](/) — The first ever React.js Conf appears to have been a success and you can enjoy 20 of the talks here in video form. Smashing Magazine [![\](http://no.gd/play.png)Terrible JavaScript Mistakes to Avoid with a Static Code Analyzer](/) — Zack Grossbart explains why he uses static analyzers to poke at his code and the sorts of errors they can dig up. Dr.​ Axel Rauschmayer [![\](http://no.gd/play.png)A 90 Minute Overview of ECMAScript 6 (video)](/) — Axel is clearly on a roll in researching for his new ES6 book and here he shares a talk he gave at the Rolling Scopes Conference earlier this month. The audio are video are both clear too, yay! Frontline Systems Inc.​ [![\](http://no.gd/play.png)Try RASON™ – RESTful Analytic Solver™ Object Notation for Web/Mobile Apps](/) — Be the first to try the [RASON](https://rason.com/?utm_source=jsweekly=email=feb20)™ beta – the super-easy way to solve powerful optimization and simulation models from your web or mobile app. Use a high-level modeling language embedded in JSON, and a simple REST API that’s free for small problems, but scalable to handle huge models. npm Inc.​ [![\](http://no.gd/play.png)jQuery Plugin Registry Now Read-Only; Publish to npm Instead](/) — Use ‘jquery-plugin’ as a keyword in your package.json. Lin Clark has [a tutorial about how to publish a jQuery plugin via npm.](http://blog.npmjs.org/post/111475741445/publishing-your-jquery-plugin-to-npm-the-quick) IEBlog [![\](http://no.gd/play.png)Bringing asm.js to the Chakra JavaScript Engine](/) — Support for asm.js has been one of the most requested items on the IE Suggestion Box and it’s now ‘in development’ within IE’s JavaScript engine on Windows 10. Kyle Simpson [![\](http://no.gd/play.png)The 'You Don't Know JS' Book Series](/) — 3 of the 6 titles are finished and you can read the drafts free online or buy final published versions. O'Reilly Media [![\](http://no.gd/play.png)2 Live Online Hybrid Mobile App Dev Talks on February 25](/) — O'Reilly's holding a free online event featuring Holly Schinsky talking about using the iOS8 WKWebView and TJ Van Toll talking about NativeScript, a new JavaScript-basd cross platform mobile app technology. New Relic [![\](http://no.gd/play.png)Analytics Engineer at New Relic (Portland, OR)](/) — If you've built multiple responsive Web applications, have years of full-time JavaScript experience, and want to ship new features that will be used by the thousands of other developers who use our tools, apply to New Relic. We can help with relocation and are open to H1-B transfers. Hired [![\](http://no.gd/play.png)Hired gives top Javascript developers more power in their job search.](/) — You'll create a profile over 1 week tech companies will apply to you! You'll get salary/equity offers upfront you're under no obligation to accept any offer. Interested? Join Hired today! Skyscanner [![\](http://no.gd/play.png)Software Engineers at Skyscanner (remote – with 20% of time in Edinburgh, Scotland)](/) — Comfortable with client MVC frameworks and have a strong grasp of modern client toolsets? Come and help us craft new products and services for Skyscanner’s 200 million visitors a year. Babel [![\](http://no.gd/play.png)The 6to5 JavaScript Transpiler has Renamed to Babel](/) — io.​js [![\](http://no.gd/play.png)The io.js Roadmap](/) — Slides outlining where the Node.js fork is headed. InfoWorld [![\](http://no.gd/play.png)Eich: JavaScript Will Deliver On Java's Broken Promise](/) — Paul Krill picks up on some comments Brendan Eich made at the Node Summit. Garris Shipon [![\](http://no.gd/play.png)Visual Regression Testing For Angular Applications](/) — Lin Clark [![\](http://no.gd/play.png)How to Publish Your jQuery Plugins to npm](/) — Dr.​ Axel Rauschmayer [![\](http://no.gd/play.png)Classes in ECMAScript 6: The Final Semantics](/) — ZingChart [![\](http://no.gd/play.png)Fast JavaScript Charts That Work Everywhere](/) — Charts break when data gets big? Compatibility issues? Time to try ZingChart! See it in action. Oguz Bastemur [![\](http://no.gd/play.png)Now asm.js is Available for Node Apps](/) — Using the alternative JXcore implementation which embeds Firefox’s SpiderMonkey JS engine. Red Gate Software [![\](http://no.gd/play.png)24% of database devs don’t use source control. Do you?](/) — Database source control is now standard. SQL Source Control is an easy way to start – it links your database to any source control system. Try it free Mathias Bynens [![\](http://no.gd/play.png)JavaScript Loves Unicode](/) — One of the most popular sessions at O’Reilly Fluent 2014 looked at how JavaScript’s handling of Unicode can produce unexpected results. Miroslav Magda [![\](http://no.gd/play.png)favico.js: Make Use of Your Site's Favicon with Badges, Images or Videos](/) — Jeremy Ashkenas [![\](http://no.gd/play.png)Underscore.js 1.8.0 Released: The Functional Programming Helper Library](/) — There have been numerous changes, including [breaking ones](https://github.com/jashkenas/underscore/issues/2061), such as renamed and removed methods. Knock Me Out [![\](http://no.gd/play.png)Knockout.js 3.3 Released](/) — Maker Studios [![\](http://no.gd/play.png)ko-calendar: A Datetime Picker Built with Knockout.js](/) — Nathan Rutzky [![\](http://no.gd/play.png)jQuery.scrollSpeed: Lightweight jQuery Extension for Modifying Vertical Scrolling Speed](/) — Facebook [![\](http://no.gd/play.png)Jest: A Jasmine-based Unit Testing Framework](/) — Automatically finds tests to execute and automatically mocks dependencies for you.