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The picture element and associated features are W3C standard HTML features that allow web developers to deliver an appropriate image to every user depending on a variety of conditions like screen size, viewport size, screen resolution, and more. Picturefill is a JavaScript file (or a polyfill to be more specific) that enables support for the picture element and associated features in browsers that do not yet support them, so you can start using them today!

A set of really nice and modern animated GIF preloaders by PixelBuddha. The colorful set comes with seven unique square style activity indicators in three sizes

Improve your Analytics skills with free online courses from Google.

Sidebar Transitions: Transition effects for off-canvas views

NGINX 1.6 and 1.7 are the current 'stable' and 'mainline' versions of NGINX. This article explains the NGINX versioning and release standards.

This post is the first in the A Node.JS Holiday Season series from the Identity team at Mozilla, who last month delivered the first ...

Zend Framework 2.2.7 and Zend Framework 2.3.1: These fix a security issue reported at http://framework.zend.com/security/advisory/ZF2014-03 - a potential XSS vulnerability in a number of ZF2 view helpers. Additionally, ZF 2.3.1 contains more than 80 bugfixes; you can read about these releases at http://bit.ly/zf-2-3-1 If you are using ZF2, and specifically view helpers, we highly recommend upgrading to either 2.2.7 or 2.3.1 ASAP.

The CSS Timing Function Explained: It’s one of the less obvious animation-based CSS properties, whereas most of its counterparts are rather self-explanatory. Nevertheless, the gist of it is that it enables you to control and vary the acceleration of an animation — that is, it defines where the animation speeds up and slows down over the specified duration.

hackathon-starter - A boilerplate for Node.js web applications

PredictionIO is an open source machine learning server for software developers to create predictive features, such as personalization, recommendation and content discovery. Building a production-grade ...

Award-winning data science platform for open technologies: Pig, Python, MongoDB and more. Easily run a custom recommender system, analyze logs, or do NLP.

And they make Heartbleed a thousand times worse

Creating, testing and maintaining a large JavaScript code base is not easy — especially since great resources on how to do this are hard to find. This page is a collection of the best articles, videos and presentations we've found on the topic.

Progress Button Styles: Creative effects for loading buttons

Cluster is the first native mobile app I’ve designed, and the experience has taught me a lot about things to consider that aren’t necessarily a concern on..

Up your JavaScript debugging kung fu with asynchronous call stack traces in the Chrome DevTools.

A very simplistic form interface that shows only one text input at a time and reveals the next input with a subtle transition. The concept is based on the form

GitHub showcases

Seamlessly track client-side JavaScript errors with enough information to actually fix them! We built an event recording system to capture interesting context about your application, the network transactions, and what your visitor was doing on the page.

In our boot camps, students are introduced to several tools and libraries to expand the abilities of their code. Kalina, one of our current JavaScript students, compiled a list of these tools and wanted to share it with other Code Fellows.

TypeScript Language team blog

LiquidFun is a 2D physics engine for games. Go to our landing page to browse our documentation and see some examples.