OpenJS World

If you haven’t written tests before, the subject can seem overwhelming. You might have questions like:
- “What’s a unit test?”
- “What’s an assertion?”
- “What’s a test fixture?”
…and that’s just the terminology!

A maintainer of Mocha since 2014, Chris will tenderly guide you through basic testing concepts using the JavaScript testing framework, Mocha. Chris will offer non-overwhelming, real-world examples of Mocha usage and how you can apply this to your own codebase. If you “don’t know what you don’t know” about testing JavaScript, this tutorial will clarify what you don’t know. In the nicest way possible, of course.

Breaking into the open source market can be key to not only developing a community of developers but also attracting talent to work at your organization, but what are you supposed to do if your product is proprietary? How do you get into open source without opening the money making code to the whole world?

In this lightning talk I'll discuss what steps can be taken to find open source opportunities where you may not expect to find them, including real life examples that we've taken at Qlik.

Curious about Artificial Intelligence, Machine Learning, or Deep Learning? What's the difference between them? Want to understand how others are using ML creatively? If you are new to these areas, learn what is going on behind the scenes, and take your first steps in JavaScript! No math / computer science background required.

This speedy tour of the state of Machine Learning by Jason Mayes, a Senior Developer Advocate within Research & Machine Intelligence (RMI) for TensorFlow.js at Google will cover a high-level overview of how deep neural networks work, their creative applications, along with some of the APIs + libraries you can use from Google to get started and do more advanced things. This fast-paced talk aims to educate, inspire, and enable you to rapidly prototype your next idea in this amazing industry.

Aimed at beginners, but everybody is welcome!

WebSockets hold a very special place in web development. They are a very useful solution for bidirectional communication on the web. It definitely feels like one of the most web-y technologies we have. When AWS introduced WebSocket capabilities to the API Gateway, I was thrilled. No more using IoT Core, or hijacking queues, it was a real WebSocket. In this talk, I set up an interactive demo that involves the audience and displaying it on the large screen with high entertainment value. I aim to make all of my talks appeal to multiple levels of developers, from beginners to veterans by showing examples and talking about real world experiences. We will revive WebSockets to their full glory in the serverless age!

In with ES6 JavaScript landed a fully-fledged module system, ECMAScript Modules (ESM). This module system was initially built for the front-end, and works rather well for that use case. However, JavaScript had already had multiple ecosystem-built module systems prior to this - one of which won: CommonJS (CJS).

Over the last few years, the Node.js project has been working on implementing ESM in a way that wouldn't break the 1+ million modules published to npm that folks already rely on for their production systems.

That implementation is (hopefully!) here, providing the ability to use ESM natively in Node.js.

In this talk, we'll go over the various distinct features of the new module system in Node.js. You'll walk away ready to use ESM as a first-class module within your next Node.js project.

A few years ago, Heartbleed epitomized a massive open source sustainability problem for critical parts of the internet infrastructure. The bug notably compromised the confidentiality of 4.5 million US patient records and cost the industry an estimated $500M.

It was soon revealed that the root-cause of the issue was that OpenSSL was precariously understaffed. Open source sustainability became a major theme overnight. Stories of maintainer burn-out made the headlines. Tentative solutions started to emerge, most of them donation-based.

In this talk we’ll explore a number of existing strategies to fund open source and make it more sustainable, from patronage to dedicated ad networks. And we’ll defend the idea that the best path to open source sustainability is to help companies understand the tangible business value they can get from contributing.

As our industry grows, more engineers from underrepresented groups are coming from nontraditional backgrounds. In this talk, Sofia discusses this growing movement through her own experience transitioning careers. She will discuss her transition by talking about her first major project, a probot github application that merges PR’s once all tests have passed. Sofia will cover five basic steps she took at building the bot, which serve as a mirror of the overall process of changing careers: she consulted with knowledgeable colleagues in the field, designed a clear but general plan, aimlessly gathered information, got an approving ‘catalyst’ that refined and clarified her plan, and finally, executed. By the end of this talk, Sofia will have taught her audience how to support their colleagues from nontraditional backgrounds, as well as the basics of how to build a merge-on-green bot.

The sheer vastness of the Node.js module ecosystem poses challenges for the consumers, authors, and maintainers. How do consumers know which of the 1 million modules to rely on for their production deployments? How do module authors handle their hobby projects evolving into a widespread, critical dependency? What happens to abandoned modules? How can a module author test the impact of their changes on dependant applications? This talk will highlight these problems, and also showcase the work that the Node.js Package Maintenance team is doing to try and help solve these problems.

In this session, you’ll get a musical introduction to the basics of Kubernetes, with the help of a keytar, React, and the Web MIDI API. Attendees will learn about fundamental Kubernetes concepts such as pods, services, and deployments as we build out a visual representation of a container-based, scalable web application.