JSJ 275: Zones in Node with Austin McDaniel

JSJ 275: Zones in Node with Austin McDaniel

JSJ 275: Zones in Node with Austin McDanielThe panel for this week on JavaScript Jabber is Cory House, Aimee Knight, and Charles Max Wood. They speak with special guest Austin McDaniel about Zones in Node. Tune in to learn more about this topic![00:01:11] Introduction to Austin Austin has worked in JavaScript for the past ten years. He currently works in Angular development and is a panelist on Angular Air. He has spent most of his career doing work in front-end development but has recently begun working with back-end development. With his move to back-end work he has incorporated front-end ideas with Angular into a back-end concept.[00:02:00] The Way it WorksNodeJS is an event loop. There is no way to scope the context of a call stack. So for example, Austin makes a Node request to a server and wants to track the life cycle of that Node request. Once deep in the scope, or deep in the code, it is not easy to get the unique id. Maybe he wants to get the user from Passport JS. Other languages – Python, Java – have a concept called thread local storage. They can associate context with the thread and throughout the life cycle of that request, he can retrieve that context.There is a TC39 proposal for zones. A zone allows you to do what was just described. They can create new zones and associate data with them. Zones can also associate unique ids for requests and can associate the user so they can see who requested later in the stack. Zones also allow to scope and create a context. And then it allows scoping requests and capturing contacts all the way down.[00:05:40] Zone UsesOne way Zone is being used is to capture stack traces, and associating unique ids with the requests. If there is an error, then Zone can capture a stack request and associate that back to the request that happened. Otherwise, the error would be vague.Zones are a TC39 proposal. Because it is still a proposal people are unsure how they can use it. Zones are not a new concept. Austin first saw Zones being used back when Angular 2 was first conceived. If an event happened and they wanted to isolate a component and create a scope for it, they used Zones to do so. Not a huge fan of how it worked out (quirky). He used the same library that Angular uses in his backend. It is a specific implementation for Node. Monkey patches all of the functions and creates a scope and passes it down to your functions, which does a good job capturing the information.[00:08:40] Is installing the library all you need to get this started?Yes, go to npminstallzone.js and install the library. There is a middler function for kla. To fork the zone, typing zone.current. This takes the Zone you are in and creates a new isolated Zone for that fork. A name can then be created for the Zone so it can be associated back with a call stack and assigned properties. Later, any properties can be retrieved no matter what level you are at.[00:09:50] So did you create the Zone library or did Google?The Google team created the Zone library. It was introduced in 2014 with Angular 2. It is currently used in front-end development.[00:10:12] Is the TC39 proposal based on the Zone library?While Austin has a feeling that the TC39 proposal came out of the Zone library, he cannot say for sure.[00:10:39] What stage is the proposal in right now?Zone is in Stage Zero right now. Zone JS is the most popular version because of its forced adoption to Angular. He recommends people use the Angular version because it is the most tested as it has a high number of people using it for front-end development.[00:11:50] Is there an easy way to copy the information from one thread to another?Yes. The best way would probably be to manually copy the information. Forking it may also work.[00:14:18] Is Stage Zero where someone is still looking to put it in or is it imminent? Austin believes that since it is actually in a stage, it means it is going to happen eventually but could be wrong. He assumes that it is going to be similar to the version that is out now. Aimee read that Stage Zero is the implementation stage where developers are gathering input about the product. Austin says that this basically means, “Implementation may vary. Enter at your own risk.”[00:16:21] If I’m using New Relic, is it using Zone JS under the hood? Austin is unsure but there something like that has to be done if profiling is being used. There has to be a way that you insert yourself in between calls. Zone is doing that while providing context, but probably not using Zone JS. There is a similar implementation to tracing and inserting logging in between all calls and timeouts.[00:17:22] What are the nuances? Why isn’t everybody doing this?Zone is still new in the JavaScript world, meaning everyone has a ton of ideas about what should be done. It can be frustrating to work with Zone in front-end development because it has to be manually learned. But in terms of implementation, only trying to create a context. Austin recommends Zone if people want to create direct contacts. The exception would be 100 lines of Zone traces because they can get difficult.Another issue Austin has is Node’s native basic weight. Weight hooks are still up in the air. The team is currently waiting on the Node JS community to provide additional information so that they can finish. Context can get lost sometimes if the wrong language is used. He is using Typescript and doesn’t have that problem because it is straightforward.[00:21:44:] Does this affect your ability to test your software at all?No, there have not been any issues with testing. One thing to accommodate for is if you are expecting certain contexts to be present you have to mock for those in the tests. After that happens, the tests should have no problems.PicksCory: Aimee:​ Charles: Austin:LinksSpecial Guest: Austin McDaniel.

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Episoder(734)

Replacing Create React App: Why Create TS Router App Is the Future of React Development - JSJ 675

Replacing Create React App: Why Create TS Router App Is the Future of React Development - JSJ 675

We’ve been diving into the evolving landscape of React app development and why tools like Create TS Router App (CTA) are stepping up to fill the gap left by the deprecation of Create React App (CRA). What we’ve learned is that SSR (server-side rendering) isn’t one-size-fits-all—e-commerce sites need it for SEO and performance, but internal tools and dashboards often don’t. That’s where CTA shines. It gives us a fast, modern, Vite-powered setup with TanStack Router built in, so we can start small and scale up without committing to heavy frameworks like Next.js from day one.What we love about CTA is how it keeps things familiar (same structure as CRA) while giving us type safety, file-based routing, and the flexibility to add only the features we need—like Clerk, Sentry, or even SolidJS support. Whether we’re building a simple prototype or a full-featured app, CTA makes the experience smoother, more intuitive, and future-friendly.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

2 Mai 1h 30min

Empowering Devs and Innovators: Inside Vercel’s Impact, Feature Flags, and the Rise of v0 - JsJ 674

Empowering Devs and Innovators: Inside Vercel’s Impact, Feature Flags, and the Rise of v0 - JsJ 674

In this episode, Lee Robinson, who works at Vercel, discusses the company’s impact on web development despite its relatively small size. He explains their approach to empowering small, founder-led teams to build impactful tools, highlighting their new open-source Flags SDK. They also discuss the importance of server-side feature flagging to improve performance and reduce UI shifts, while warning against exposing sensitive data through client-side experimentation. The conversation then shifts to Vercel’s internal innovation culture, particularly the development of v0, an AI-driven tool for building full-stack web applications quickly, which is especially accessible for non-developers with creative ideas.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

21 Apr 1h 22min

Building 50 Apps in 50 Days: The Power of Boring Stacks with Kelvin - JsJ_673

Building 50 Apps in 50 Days: The Power of Boring Stacks with Kelvin - JsJ_673

In this episode, we dive into an engaging conversation with Kelvin, where we explore his approach to full-stack JavaScript development and the power of using simple, stable technologies to speed up app development.Kelvin shares his exciting project, "Project 50," where he’s challenging himself to build 50 apps in 50 days, highlighting the importance of leveraging "boring" stacks to streamline the development process. We also touch on his journey in teaching web development through free resources and screencasts, aiming to make it easier for developers to build real-world apps quickly. Along the way, we discuss the value of strategy games like chess and Go, and how they help foster critical thinking and continuous learning. It’s a great mix of tech, strategy, and entertainment, making this episode a must-listen for developers and anyone looking to level up their skills. Tune in for a fun and insightful discussion!Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

14 Apr 1h

Breaking Into Tech: Lessons from My Career Path - JsJ 672

Breaking Into Tech: Lessons from My Career Path - JsJ 672

This episode is a little different—thanks to a U.S. holiday, I’m flying solo. But that just means we get to have a one-on-one chat!I dive into my career journey—not to brag, but to offer insights for anyone feeling stuck, of how my inventor grandfather sparked my early interest in tech, how I transitioned from electrical engineering to computer engineering, and how I went from IT support to discovering my love for programming while solving real-world problems at Mosey with Ruby on Rails.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

7 Apr 44min

Pioneers of Computing: A Journey Through Tech History with Bob Martin - JsJ 671

Pioneers of Computing: A Journey Through Tech History with Bob Martin - JsJ 671

In this episode, we dive into a fascinating mix of tech history, personal stories, and entertainment recommendations. We chat with Bob Martin, who shares insights from his new book, offering a look back at the pioneers of computing, including early breakthroughs and the industry's evolution. Bob talks about the challenges of leaving out influential figures like Margaret Hamilton, Donald Knuth, and Linus Torvalds, while also reminiscing about his early career as a self-taught developer during the 70s.The conversation takes a fun turn when we discuss some mind-blowing tech feats, including a wild project where Doom was implemented using TypeScript’s type system—a true demonstration of the power of programming languages. For those into entertainment, we share some great picks, like the classic science fiction novels When Worlds Collide and After Worlds Collide, plus a rundown of TV shows like Reacher and the intriguing comparison between the Expanse books and TV show. Packed with history, tech talk, and plenty of geeky fun, this episode is a must-listen for anyone interested in the past, present, and future of computing!Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

1 Apr 1h 9min

Beyond Aesthetics: What the Next Generation of Frameworks Should Offer - JsJ_670

Beyond Aesthetics: What the Next Generation of Frameworks Should Offer - JsJ_670

In this episode of JavaScript Jabber, our host Charles Max Wood, panelist Dan Shappir, and special guest Yoav Abrahami, CTO of Wix Enterprise, engage in a fascinating discussion on the evolving landscape of web frameworks. They dive into the functional and nonfunctional requirements of frameworks, the emerging innovations in meta frameworks, and the significant market shifts driven by increasing regulations and AI advancements. Yoav shares insights into his work on creating a collaborative web framework aimed at bridging the gap between designers and developers, while also addressing crucial future trends in security and design-to-code capabilities. Tune in to explore the dynamic future of web development with insights from industry leaders.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

6 Mar 1h 15min

A Guide to AI Models: From Tokenization to Neural Networks with Ishaan Anand - JsJ_669

A Guide to AI Models: From Tokenization to Neural Networks with Ishaan Anand - JsJ_669

In this enlightening episode of JavaScript Jabber, hosted by Charles Max Wood and Steve Edwards, panelist AJ O'Neil is joined by guest Ishaan Anand to delve deep into the intricacies of AI and large language models. Ishaan, an expert with over two decades of experience in engineering and product management, shares insights into his innovative implementation of GPT-2, providing a comprehensive breakdown of how transformers work in AI. The discussion covers various aspects of AI, including how models predict the next word, the concept of tokenization, embeddings, and the attention mechanism which is central to transformer architectures. Listen in as they explore practical applications, challenges, and the evolving landscape of AI, with a special emphasis on mentorship and education through Ishaan's unique course offering. Whether you're an AI aficionado or a JavaScript developer eager to expand your knowledge, this episode offers valuable perspectives and learning opportunities.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

21 Feb 1h 38min

Exploring ReactScan: Aiden Bai's Tool for Identifying React Performance Issues - JsJ 668

Exploring ReactScan: Aiden Bai's Tool for Identifying React Performance Issues - JsJ 668

In this episode of JavaScript Jabber, panelist Dan Shappir sits down with guest Aden Bai to delve into the nuances of React performance. Broadcasting from Tel Aviv, Dan welcomes Aden, who is based in San Francisco, for an insightful discussion on optimizing React apps. Aden, known for his projects Million JS and ReactScan, shares his journey into coding and his focus on enhancing web performance. Together, they explore the intricacies of the virtual DOM, React rendering processes, and the common pitfalls that developers face in managing performance. Aden introduces ReactScan, a tool designed to visualize and troubleshoot performance issues in React applications, making complex profiling accessible to a broader range of developers. The conversation also touches on broader performance metrics like Core Web Vitals and the challenges of maintaining efficiency across various devices and browsers. Whether you're a seasoned developer or new to React, this episode offers valuable insights into creating faster and more efficient web applications. Tune in to learn how you can improve your React project's performance and user experience with tools and techniques from top industry experts.Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

13 Feb 1h 7min

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