--- title: "This week's JavaScript news, issue 219" publication: "JavaScript Weekly" issue: 219 published_at: "2015-02-12" canonical_url: "https://javascriptweekly.com/issues/219" --- This week's JavaScript news, issue 219 This week's JavaScript news — [Read this e-mail on the Web](http://javascriptweekly.com/issues/219) JavaScript WeeklyIssue 219 — February 12, 2015[Variables and Scoping in ECMAScript 6](http://www.2ality.com/2015/02/es6-scoping.html) Axel takes a serious dive into how variables and scoping are handled in ES6, including mutability, hoisting, and the ominous sounding ‘temporal dead zone’. Dr. Axel Rauschmayer [React Canvas: High Performance Canvas Rendering for React Components](https://github.com/flipboard/react-canvas) Adds the ability for React components to render to an HTML5 Canvas rather than the DOM. Flipboard [Building an Angular2 Todo App: A First Look At Angular2 App Development [video\]](https://www.youtube.com/watch?v=uD6Okha_Yj0) Angular core contributor David East gives an overview of what’s new in Angular and live codes a Angular2 ToDo app. YouTube [![Stormpath\](https://copm.s3.amazonaws.com/3e3aa30b.png)](https://stormpath.com/blog/token-auth-spa/?utm_source=javascript%20weekly=email=SPAjs)[New! Easy, Secure Token-Based Authentication for Single Page Applications](https://stormpath.com/blog/token-auth-spa/?utm_source=javascript%20weekly=email=SPAjs)The new Stormpath Angularjs SDK makes it easy to implement token or user authentication in single page apps - securely and easily! Backend support for Node, Express Java. StormpathSponsor [Embracing Promises in JavaScript](http://javascriptplayground.com/blog/2015/02/promises/) A simple look at how using promises can result in much nicer code when working with asynchronous concepts. It leans on the es6-promise library, a polyfill for ES6’s native promises construct. Jack Franklin [An In-Depth Guide To Writing Pebble Apps Using JavaScript](http://code.antrikshy.com/pebble-js-tutorial-a-guide-to-writing-pebble-apps-using-javascript/) The Pebble is a low-powered e-paper-based smartwatch. Antriksh Yadav [memory-stats.js: Minimal Monitor for JS Heap Size via performance.memory](https://github.com/paulirish/memory-stats.js) Inspired by stats.js, this lets you see the current JS memory usage in realtime in Chrome (only). It could help you in detecting memory leaks. Paul Irish [Joyent Moves to Establish Node.js Foundation](http://www.joyent.com/about/press/joyent-moves-to-establish-nodejs-foundation) Joyent, IBM, Microsoft, PayPal, Fidelity, SAP and The Linux Foundation have come together to establish a formal open governance model for Node. Joyent Jobs - [Senior Front End Developer at Lonely Planet (Franklin, TN)](http://www.lonelyplanet.com/careers/?#op-42938-senior-front-end-developer-online-team)As a member of the the Lonely Planet Online team, you will be an integral part of delivering the core experience to our customers ensuring our site is a place that inspires, connects and helps travellers. Lonely Planet - [JavaScript developer for Amazon Web Services in Berlin (m/f)](http://www.amazon.jobs/jobs/305736/software-development-engineer-javascript-web-components-for-amazon-web-services-berlin-mf?utm_source=javascriptweekly&utm_medium=email)Amazon Web Services (AWS) is looking for an experienced JavaScript developer to work on a frontend development framework based on upcoming web standards and latest technologies for evergreen browsers. Amazon Development Center DEU - [Freelance with Companies like Airbnb, IDEO JPMorgan](http://www.toptal.com/developers?utm_source=js_weekly=cpm-newsletter=js_weekly_job)Work on special projects with great companies through Toptal. Set your weekly/hourly rate, and work from anywhere in the world as an elite HTML5 developer. See if you have what it takes TopTal In Brief [Ember.js 1.10.0 and 1.11 Beta Released](http://emberjs.com/blog/2015/02/07/ember-1-10-0-released.html) news [Esprima 2.0 Released](http://blog.jquery.com/2015/02/06/esprima-2-0-released/) news The widely used JavaScript parser that powers many code analysis tools. Dave Methvin [Building AngularJS Applications Workshop](https://frontendmasters.com/workshops/angularjs-app-dev/) news Build an application from the ground up with AngularJS live online. Frontend MastersSponsor [Node v0.12.0 (Stable) Released](http://blog.nodejs.org/2015/02/06/node-v0-12-0-stable/) news node Official Node Blog [The jQuery Foundation's 2014 Annual Report](http://blog.jquery.com/2015/02/11/jquery-foundation-2014-annual-report/) news Some tidbits like jQuery’s CDN served up 290 billion requests and 11 petabytes of data in 2014. Official jQuery Blog [CoffeeScript 1.9 is Available, Introduces Generators Support](http://www.infoq.com/news/2015/02/coffeescript-19-generators) news InfoQ [Technical and Social Progress Toward ECMAScript 6 at Facebook](http://fluentconf.com/javascript-html-2015/public/content/2015/02/06-ecmascript-6-at-facebook) video From O'Reilly Fluent 2014. Ben Newman [How to Detect Problems in JavaScript Automatically with ESLint](http://davidwalsh.name/eslint) tutorial Jani Hartikainen [How to Correctly Use BootstrapJS and AngularJS Together](https://scotch.io/tutorials/how-to-correctly-use-bootstrapjs-and-angularjs-together) tutorial Chris Sevilleja [Iterating ES6 Numbers](http://blog.getify.com/iterating-es6-numbers/) tutorial Kyle Simpson [Animating Text with Blast.js](http://www.sitepoint.com/animating-text-with-blast-js/) tutorial code A jQuery plugin that allows you to animate individual characters, words, or sentences. SitePoint [Node.js Application Deployment & Hosting Simplified](http://modulus.io/?utm_campaign=Cooper%20Press%20-%20Node.js%20%26%20JavaScript%20Weekly=node.js%20newsletter=email=email) tools Modulus provides a portable, scalable and customizable Node.js hosting platform. Try it for free now. ModulusSponsor [Oceanic Next: An ES6-ready Sublime Text Theme](https://github.com/voronianski/oceanic-next-theme) tools Optimized for the 6to5-sublime package. Dmitri Voronianski [Performance Recommendation: Do Not Use jQuery's hide() Method. Ever.](https://github.com/jquery/jquery.com/issues/88?#issuecomment-72400007) opinion Paul Irish [React/Flux from an AngularJS Perspective](http://blog.celerity.com/react/flux-from-an-angularjs-perspective) opinion Micah Fulton [Plumin.js: Create and Manipulate Fonts using JavaScript](http://www.pluminjs.com/) code The demo on the front page converts ‘a’s to triangles and ‘o’s to circles on the fly. Clever stuff. Byte Foundry [Reapp: Build Hybrid Apps Quickly with React, Webpack, and ES6](http://reapp.io/) code An early-stage UI framework for building hybrid mobile apps. Reapp.io [NtSeq: JavaScript Bioinformatics Library for DNA Sequence Manipulation and Analysis](http://keithwhor.github.io/NtSeq/) code Keith Horwood [fecha: Lightweight Date Formatting and Parsing](https://github.com/taylorhakes/fecha) code Taylor Hakes Curated by [Peter Cooper](http://twitter.com/peterc) and published by [Cooperpress](https://cooperpress.com/). Like this? You may also enjoy: [FrontEnd Focus](http://frontendfocus.co/) : [Node Weekly](http://nodeweekly.com/) : [React Status](http://react.statuscode.com/) [Stop getting JavaScript Weekly](*|UNSUB|*) : [Change email address](*|UPDATE_PROFILE|*) : [Read this issue on the Web](http://javascriptweekly.com/issues/219) © Cooperpress Ltd. Fairfield Enterprise Centre, Lincoln Way, Louth, LN11 0LS, UK