Javascript周报#182

This week’s JavaScript news

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JavaScript Weekly

Issue 182 May 23, 2014

Editor: Peter Cooper

Featured

Data-Binding Revolutions with Object.observe() — Object.observe(), part of a future ECMAScript standard, is a method for asynchronously observing changes to JavaScript objects (for frameworkless two-way binding, say). Support for it has arrived in Chrome 36 beta and Addy Osmani presents a full lowdown on its use.

HTML5 Rocks

24 Talk Videos from EmpireJS — EmpireJS took place in New York City just a few weeks ago but all of the talks are already available to watch. Lots of topics fromsorting algorithms and robots to image analysis on art and Web Components.

EmpireJS

Flo: A New Live Coding Tool for Chrome by Facebook — A Chrome extension that lets you modify running apps without reloading. Live edit JavaScript, CSS, images, etc, and works with your editor of choice.

Facebook

From our Sponsor

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Reading

The Curious Case of JavaScript NaN — NaN (meaning Not a Number) is a special value in JavaScript that denotes an undefined or unrepresentable value. However, it can also feel like it means ‘Not a NaN’ because NaN === NaN is false. Confused? Ariya lays it out.

Ariya Hidayat

Script-injected “async scripts” Considered Harmful — Script-injected scripts (i.e. scripts dynamically included via JavaScript) do not block the network in the usual way synchronous scripts do. However, there is still a gotcha, as they’re not truly asynchronous.

Ilya Grigorik

A Guide to JavaScript Memory Profiling with Google Chrome — A guide to profiling memory issues in JavaScript webapps, particularly memory leaks and garbage collection pauses.

Google Chrome

Frame-by-Frame Animation with HTML and JavaScript — A detailed walkthrough on creating frame-by-frame animation using JavaScript and the benefits and drawbacks of the technique by Bartek Drozdz.

Flippin’ Awesome

Using Media Queries in JavaScript with AbsurdJS — AbsurdJS provides a polyfill for window.matchMedia which allows you to both make media queries within the browser and also define callbacks for when a media query’s condition matches the environment.

Tech.pro

Convention Based Routing In JavaScript Apps — A look at the state of routing in JavaScript apps and how to implement convention based routing by Burke Holland.

Flippin’ Awesome

Web Animations – element.animate() Is Now in Chrome 36

HTML5 Rocks

Flux in Practice: A Guide to Building UIs with React — What does it actually mean to write an application in the Flux way? (Flux is a set of principles for building scalable apps with React.)

Gary Chambers

Communicating Large Objects with Web Workers in JavaScript

Samuel Mendenhall

Creating Asynchronous Alerts, Prompts, And Confirms In AngularJS — See the comments for some provisos.

Ben Nadel

Fixture Adapters – Ember.js With No Server

SitePoint

Watching

Lesser Known Debugging Techniques — At EmpireJS, Amjad Masad gave a 25 minute talk about debugging, starting with some history and crude methods before moving to monkey patching, live editing, breakpoints, and more.

Amjad Masad

JavaScript Jabber Discusses AngularJS with Igor Minar — A 45 minute round-table discussion featuring the AngularJS project’s team leader, Igor Minar.

JavaScript Jabber

Easing into ECMAScript 6 and Beyond — Facebook’s Ben Newman looks at the future of JavaScript and explores the idea of easing into using ES6’s most useful features from ES5 to avoid a Python 3-style ‘big jump’ situation.

Ben Newman

Jobs

Developer Evangelist — Want to make being part of the Node and Javascript developer community your full time job? Then Orchestrate is looking for you.

Orchestrate

Frontend Developer at Kyto (Berlin, Germany) — Take your chance to develop an entire frontend concept in a team of 6 hungry brains. Create a web app feeling for our B2B online marketing tool.

Kyto

JavaScript Developer — Booking.com is looking for the world’s best Front End Developers all around the globe. Join us at our beautiful headquarters in Amsterdam and work on planet Earth’s #1 accommodation website with some of our industry’s smartest people.

Booking.com

Code, Libraries and Tools

Google Open Sources ‘JsAction’, A JavaScript Event Delegation Library — A tiny event delegation library that allows decoupling the DOM nodes on which the action occurs from the JavaScript code that handles the action.

Google

forms-angular: Form Generation Framework On Top of MEAN and Bootstrap

Mithril: Another Client-side MVC Framework — Encourages MVC best practices, small API, gentle learning curve, only 3KB gzipped.

Leo Horie

EchoJS: An Ahead of Time Compiler and Runtime for ECMAScript — Seems to be very much a prototype/proof of concept.

Chris Toshok

Fluxxor: Tools to Build JS Data Layers with the Flux Architecture — Includes helpers for use with React.

Last but not least..

24% of devs don’t use database source control – make sure you aren’t one of them — Databases are catching up with applications when it comes to version control. So what steps can you take to source control your databases? SQL Source Control connects databases to the source control system you already use. Try SQL Source Control free.

Red Gate Software  Sponsored

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