Dina Goldshtein demonstrates how to use the Canvas API to draw a very large number of shapes in the browser, animate them, and apply various transformations. Dina also shares some best practices for wrapping the Canvas API with custom JavaScript classes.

Is your AngularJS application becoming too difficult to maintain? Corinna Cohn explains how to take an overburdened application and make it maintainable by separating concerns of retrieving models, creating components, and isolating business logic. You will learn techniques for making your own code cleaner and more maintainable by writing small, testable modules instead of tangled monoliths.

Building Docker images is easy; thats why there are over 45,000 public images on Docker Hub today (albeit only 100 of them "official" images). Creating reproducible, secure images from source that are easily maintained and updated takes a bit more planning and automation. Ryan Jarvinen illustrates what it takes to create a successful (and secure) build strategy.

Oliver Friedmann introduces Ziggeo's open source framework for video recording and playback, which features responsive HTML5-enabled components with Flash fallbacks for older browsers. It is customizable and extendable via the components' state machines and their dynamic templating system and works across all platforms, including mobile browsers.

Web apps are complex and comprised of many technologies. It can be difficult to simultaneously scale large server and client codebases. Scala is an expressive, performant language that can now run in your browser as well as on the JVM. Paul Draper explains how Scala's presence on the two most ubiquitous runtimes greatly assists web developers.

It's one thing to create a sample RESTful API using Node.js, but it's quite another to horizontally scale your architecture to hundreds of thousands of concurrent connections while trying to ensure redundancy and high availability. Volkan zelik shows what it takes to create real-life, scalable, highly available, and highly responsive Node.js applications.

If you work with web technology, at some point you'll work on something people will see. What's the quickest way to better interfaces? Tracy Osborn explores the two most important principles to get you started on the path to being a better designer.

Feel free to submit a pull request. For some, this is a welcome invitation, but for many developers, pull requests are intimidating, discouraging them from contributing to the community. Kent Dodds demonstrates how easy and fun it is to create a pull request as a first timer. And if youre a project maintainer, Kent will show what you can do to make contributing easier and more inviting.

From unit testing to visual-regression testing to even testing accessibility, the list of frameworks that help you test your codealready quite a large landscapecontinues to grow over time. Alicia Sedlock gives an overview of the state of frontend testing and explains how you should go about choosing which tests work best for your product.

As JavaScript has evolved over the past several years, so have the patterns for handling its asynchronous nature. Through callbacks, Promises, and now async functions, JavaScript has made asynchronous control flow easier to tackle. Jeremy Fairbank dives into the new async functions landing in ES7 and investigates various use cases and gotchas along the way.

The Web has grown to become a hugely important medium, but it has also become horrendously complex, which extends development schedules and promotes bug formation. Douglas Crockford introduces Seif, an open source project started at PayPal with the goal of transitioning the Web into an application delivery system that will be safer, easier to use, and easier to develop for.

If you've always wanted to play around with D3 or Julia, Philip Tellis will bring you up to speed very quickly. Philip explores both Julia and D3 to demonstrate how to extract meaningful information from web-performance data and guides participants through some fun visualizations that are possible only when using these tools together.

The ability to visualize millions of data points opens up a world of applications. But its hard to quickly render that much data, let alone compute anything with it. Thibaud Hottelier shares the GPU technologya hybrid client/server GPU engine using Node-OpenCL and a new library, CL.jsthat Graphistry used to break the million datapoint barrier for fast, interactive visualizations.

The Internet's security depends on cryptography. People use "secure" websites to take advantage of current cryptography methods. But what if users can't (or don't want to) trust the web server with their secrets? Web-page authors can use the Web Cryptography API to give their users end-to-end secrecy and authentication through web servers, not just to them. Charles and Laurie will show you how.

Tony Parisi explores the latest developments in web graphics using WebGL 2. Tony covers the new version of the 3D standard, as well as related technologies such as glTF for 3D data transmission and WebVR for web-based virtual reality.