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JavaScript Weekly Issue 182
May 23, 2014
Editor: Peter Cooper
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 from sorting algorithms and robots to image analysis on art and Web Components.
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.
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New Relic
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.
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
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
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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.
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.
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