--- title: "This week's JavaScript news, issue 303" publication: "JavaScript Weekly" issue: 303 published_at: "2016-09-29" canonical_url: "https://javascriptweekly.com/issues/303" --- This week's JavaScript news, issue 303 This week's JavaScript news — [Read this e-mail on the Web](http://javascriptweekly.com/issues/303) JavaScript WeeklyIssue 303 — September 29, 2016[React Status: Our New React-Focused Newsletter](http://react.statuscode.com/)It’s been in beta for several weeks, but our new React-focused newsletter is going well :-) If React is your thing, definitely check it out. [Latest issue here.](http://react.statuscode.com/issues/5) Cooper Press [optimize-js: Optimize JS for Faster Initial Loading](https://github.com/nolanlawson/optimize-js)A tool that wraps all immediately-invoked functions or likely-to-be-invoked functions in parentheses to speed up most JavaScript parsers’ initial parsing times. Nolan Lawson [Node.js Debugging with Chrome DevTools in Parallel with Browser JavaScript](https://blog.hospodarets.com/nodejs-debugging-in-chrome-devtools)The latest Chrome Canary lets you debug your browser JavaScript files and Node.js ones in the same DevTools window in parallel. Serg Hospodarets [![Frontend Masters\](https://copm.s3.amazonaws.com/f29c4bef.png)](https://frontendmasters.com/courses/react-intro/?utm_source=javascriptweekly&utm_medium=email)[🔥 Course: Complete Intro to React (feat. Redux & Router)](https://frontendmasters.com/courses/react-intro/)Brian Holt (Netflix) introduces you to React plus surrounding ecosystem including: Redux for state management, React Router for navigation and more! Frontend MastersSponsor [Chrome Experimenting with Foreign Fetch for Cross-Origin Service Workers](https://developers.google.com/web/updates/2016/09/foreign-fetch)All very experimental for now but the idea is to let third-party services deploy their own network request handlers. For example, a Web font service could install a service worker to cache fonts across all tabs. Google Developers [Understanding Reactive Programming and RxJS](https://auth0.com/blog/understanding-reactive-programming-and-rxjs/)A practical look at using reactive programming with RxJS to build a weather app. Martin Gontovnikas [JavaScript Asynchronous Iteration Proposal](https://ponyfoo.com/articles/javascript-asynchronous-iteration-proposal)A look at the proposal currently in the works at TC39 to simplify asynchronous iteration even further. Nicolás Bevacqua [Electron: Building Desktop Apps with Web Languages](https://www.youtube.com/watch?v=FNHBfN8c32U)A look at the things you can create using features and tools that Electron inherits from the Chromium browser, Node, and the vast ecosystem of npm modules. _42 minutes_. Zeke Sikelianos [Leaflet 1.0: A JavaScript Library for Interactive Maps](http://leafletjs.com/2016/09/27/leaflet-1.0-final.html)Years of work has culminated in a 1.0 release for this mobile-friendly interactive map generation library. Vladimir Agafonkin [g9.js: Generate Automatically Interactive Graphics](http://omrelli.ug/g9/)Draw graphics, then g9 automatically makes them interactive for end users. There’s a great set of [code-driven explanations and demos](http://omrelli.ug/g9/gallery/) to learn more. bijection Jobs - [Staff UI Engineer at LendingHome (fintech + San Francisco, CA)](https://www.lendinghome.com/careers/join-us?utm_source=javascriptweekly&utm_medium=email)LendingHome is seeking a Staff UI Engineer who is ready to create positive experiences for customers, solve complex problems and has a strong background in building best-in-class large-scale SaaS or consumer applications. Lendinghome - [Get 5+ Engineering Job Offers in 1 Week](https://hired.com/?utm_source=newsletters&utm_medium=petercooperpress&utm_campaign=q3-16-javascriptweekly)With Hired, companies apply to hire you - get salary and equity offers before you interview from companies like Facebook, Postmates, & Square Hired.com In Brief [Node v6.7.0, v0.12.16, v0.10.47 and v4.6.0 Released](https://nodejs.org/en/blog/release/v6.7.0/) news node Several releases for [important security reasons.](https://nodejs.org/en/blog/vulnerability/september-2016-security-releases/) Node.js Foundation [jQuery 3.1.1 Released (A Patch Release, No New Features)](http://blog.jquery.com/2016/09/22/jquery-3-1-1-released/) news jQuery Foundation [Manage State in Your React App with Redux](https://stormpath.com/blog/build-a-redux-powered-react-application?utm_source=javascript-weekly&utm_medium=newsletter&utm_campaign=react) tutorial Write a Redux application from scratch and learn how to reduce boilerplate in your next React project. StormpathSponsor [Quick Examples to Help You Work With the DOM](https://medium.com/@pakastin/master-the-dom-bc1a2a06089b) tutorial Covers the basics. Juha Lindstedt [3 Useful Babel Presets](http://www.2ality.com/2016/09/three-useful-babel-presets.html) tutorial Dr. Axel Rauschmayer [How to Add or Remove a CSS Class with Vanilla JavaScript](https://www.sitepoint.com/add-remove-css-class-vanilla-js/) tutorial Sitepoint [The 4 Stages of Perf Tuning Your Angular2 App](https://medium.com/@areai51/the-4-stages-of-perf-tuning-for-your-angular2-app-922ce5c1b294) tutorial Vinci Rufus [JavaScript Promises 102: The 4 Promise Methods](https://bitsofco.de/javascript-promises-102/) tutorial Ire Aderinokun [Slackwatch: Monitor Your AWS Service from Slack using Cloudwatch and SNS](http://blog.bandwidth.com/slackwatch-monitor-your-aws-service-from-slack-using-cloudwatch-and-sns/?utm_medium=advertising&utm_source=javascript_weekly&utm_campaign=2016_Q3_job-481_using_slack_and_cloudwatch_advertising&utm_content=job-481_using_slack_and_cloudwatch) tutorial Take a note from Bandwidth developer Ed Hintz on how to monitor your AWS service via Slack - it's an easy way to make Slack work for you and your team even more effectively. BandwidthSponsor [Building an Angular 2 App with a Java EE Backend](https://www.youtube.com/watch?v=rcSNj1b4s-k) video Adam Bien [Things You Can Do In ES6 That Can't Be Done In ES5](https://www.youtube.com/watch?v=GbVAMgU3Jj0) video _24 minutes._ Dan Shappir [Thoughts on JavaScript vs C++ After Creating The Same 3D Game in Both](http://www.irrlicht3d.org/pivot/entry.php?id=1513) opinion Irrlicht3d [Why Learning Angular 2 Was Excruciating](https://hackernoon.com/why-learning-angular-2-was-excruciating-d50dc28acc8a) opinion _“like trying to learn a new video game and starting on hard core mode”_ Liz Bennett [Why You Should Avoid document.write, Specifically for Script Injection](http://blog.dareboost.com/en/2016/09/avoid-using-document-write-scripts-injection/) opinion Damien Jubeau [Clipboard.js: Copy to Clipboard Without Flash](https://clipboardjs.com/) code Zeno Rocha [Choreographer: A Simple Library to Take Care of Complex CSS Animations](https://github.com/christinecha/choreographer-js) code [Demo here.](https://christinecha.github.io/choreographer-js/) Christine Cha [Bcoin: An Advanced Full Node JS Bitcoin Implementation](https://medium.com/purse-essays/introducing-bcoin-fdfcb22dfa34) code Even works in the browser. Purse [Marko: Templating Engine and UI Component Library from eBay](http://markojs.com/) code eBay [navigo: A Simple Vanilla JavaScript Router with Fallback for Older Browsers](https://github.com/krasimir/navigo) code Krasimir Tsonev [Render React and React Router v4 On-Demand with CDN Caching](https://github.com/hoppula/react-apig-lambda) code Uses Amazon API Gateway, AWS Lambda, and CloudFront. Lari Hoppula [CurrencyFormatter.js: Easy Formatting of Values in 155 Currencies](https://osrec.github.io/currencyFormatter.js/) code Contains 155 currency and 715 locale definitions out of the box. OSREC Financial [Taggd: A jQuery Plugin to Add Notes to Images](https://timseverien.com/taggd/) code Add notes and additional information to images, responsively. Tim Severien Curated by [Peter Cooper](http://twitter.com/peterc) and published by [Cooperpress](https://cooperpress.com/). Like this? 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