Modern web development is fantastic. There are so many great tools available! Modern web development is exhausting. There are so many great tools available!

What do S.H.I.E.L.D. and A.R.G.U.S. have in common with edge computing?How can Iron Man and Batman help you understand hydration, partial hydration, and resumability?What can the Watchers or the Monitors tell you about Reactivity?Join this adventure straight from the pages of a comic book as your favorite heroes and villains help you understand some of the most discussed topics on the web now.

Join us as we dive into the exciting world of React Server Components, an feature designed to revolutionize the way we build web applications. In this action-packed talk, we'll explore the key benefits of Server Components, such as reduced client-side code, improved performance, and streamlined development experience. Through engaging examples and live demos, you'll learn how to integrate Server Components into your React projects and harness their power to create next-level user experiences. Don't miss out on this opportunity to stay ahead of the curve and elevate your React skills!

Ready to take a thrilling ride into the world of headless e-commerce with Shopify Hydrogen? This cutting-edge solution, built on top of Remix, is the latest and greatest way to build high-performance online store. E-commerce is more important than ever, and providing a seamless customer experience is key. But building a platform that delivers can be daunting, even for experienced developers.

Most CSS developers today write visual styles in terms of what you literally see: exact color values, size numbers, and so on. But what if you could write styles as a function of how they fit into your design system? And what if you could get type safety in specifying and using those values, including in responsive props?This talk will dive into some of the key features and flaws in many design system builders today such as Chakra UI and Tailwind. We'll establish what the best next steps for design systems should be with type-safe TypeScript APIs and performance both for prebuilt pages and at runtime.

Do you or a loved one suffer from the all to common practice of 'useEffect'? Have you re-rendered more times than you can count? Are you ready to revolutionize your React code?Explore how to optimize performance, streamline your code, and reduce errors by challenging the conventional use of 'useEffect'.Inspired by the React Docs themselves, this talk will guide you through common 'useEffect' scenarios, demonstrating powerful alternatives to enhance your codebase. Embrace simplicity and elevate your React development skills with us!"You might not need an effect...

What if you can use the fastest JavaScript framework along with React? What if you can build applications that feel fast regardless of application size?Let's see how incredible Qwik is along with React.

In this talk, attendees will learn how to integrate OpenAI's GPT-4 language model into their React applications, exploring practical use cases and implementation strategies to enhance user experience and create intelligent, interactive applications.

While the technology goes further and further, web development tries to get closer to the user. CDNs and web servers are evolving, and they now offer us the possibility to execute server-side logic without depending on a unique data center located in a specific place in the world. Let’s present the concept of The Edge. We will see how it works, and we’ll talk about Edge Functions.

The virtual DOM is generally regarded as a necessary evil, a performance tax that we have to pay for the convenience of declarative UIs.Until now.In this talk, we'll take a deep dive into what the block virtual DOM is (an new, innovative approach to VDOM), and how Million.js can help you improve the speed of your React applications. This talk will also provide a helpful overview of how the React virtual DOM works. By the end of this talk, you'll have the knowledge to not only start improving your React apps' performance with Million.js, but understand the underlying internals that make it so fast.

A practical look at automating core accessibility testing and integrating it into your workflow.

Design systems are becoming increasingly popular in modern front-end development. However, measuring the usage and coverage of these design systems is often challenging. In this lightning talk, I'll discuss about a tool that we're working on which uses react-scanner and Abstract Syntax Tree (AST) with custom scripts to generate component usage data for a React design system. The talk will cover how we generate this data and how it is rendered in a dashboard to provide valuable insights on the coverage of the design system.- Introduction to react-scanner- Measuring Component Usage- Identifying Native HTML elements and Styled Components- Showing Tree structure of Page in terms of Components- Highlighting Anti Patterns- Benefits / Use Cases for this tool

We spend a lot of time discussing which state library we should use, and fair. There are quite a few, from the common one everyone uses and loves to hate on, to that one quirky alternative, to several up and comers. However, discussing which library is best puts the cart before the horse.When figuring out how to handle state, we should first ask ourselves: what different categories of state do we need? What are the constraints of each category?

 In this talk, Tony shows how an authoring and semantic HTML-first approach to JSX template work leads to more readable, maintainable, and accessible UI components. He demonstrates how to think through implementing a UI prototype in a semantic way, authoring HTML before visuals. He shows how accessible markup improves performance, reduces DOM size, minimizes time spent on CSS, and reduces cognitive load not only for developers, but also for all our users, no matter how they consume our sites and applications.

As web developers, it's sometimes easy to see "The Platform" as this thing we can't really change that does things for reasons we can't really understand. But that's not true! Browsers and specs are built by developers just like you and me, and the entire process is open source, which means we can do it too!Let's take a journey through a real web platform improvement from start to finish, learning how the WHATWG and browser vendors work. By the end you'll know how to update a spec, write web platform tests, land a change in major browsers, and document your shiny new feature on MDN!

When writing code for the Web, there are a lot of capabilities that are offered out of the box by our browsers. If you ever wrote a File Upload component, used timers and intervals, interacted with the DOM, or stored something in the Local/Session Storage, you had to go to the MDN’s Web API docs, to find some relevant information on how to implement that code.In this session, we will delve into the exciting world of browser Web APIs that are not so commonly used (although they should be) and explore their incredible capabilities 🚀All these features offer new opportunities for creating immersive web experiences that can help businesses grow and connect with customers.So if you are the kind of an engineer who wants to stay ahead of the curve when it comes to web development, learn how Intersection Observer, Background Sync API, Screen Wake Lock API (and many more) can help you create better web applications that will keep users engaged and coming back for more!

For many app developers, GraphQL is instrumental in building great user experiences. With the introduction of React Suspense, developers have an ergonomic way to orchestrate loading states to improve upon the status quo. In this talk, the Apollo Client team will show you how we built a non-trivial application using Apollo Client’s new Suspense features, GraphQL features like the @defer directive, and how to combine them to build great user experiences in your own apps.

This talk focuses on building a production-grade consumer social application - https://guild.host . If you visit that site, would you be able to tell it's built using React Native just by looking and using it?At a high level, Taz talks about what makes that possible and how the audience should consider application architecture.At a lower level, Taz focuses on:- How React's component composition model makes accommodating multiple platforms easy- How large applications should use a Design System, and the Tamagui Design System comes with an optimizing compiler that outputs straight platform-specific code while the developer still writes high-level UI that happens to utilize React Native's components- How to Server-Side Render a React Native Web application, and what considerations Guild made when choosing to create a custom SSR engine on top of Cloudflare Workers- In order for Guild to exist anywhere, they need to embed themselves into other experiences. This involves Third-Party React Native on the Web and other platforms- The future of this architecture, where Third-Party UI is the same as First-Party UI

Building enterprise-grade applications is challenging. So how can you learn to build one? Start by tearing one down!! Say hello to Contoso Real Estate - an open-source reference implementation featuring a composable architecture with micro-frontends and a cloud-native backend - that provides the perfect sandbox for hands-on exploration and learning.In this talk, we'll take the implementation for a spin using GitHub Codespaces as our local development environment to explore the code, build & preview the application and deploy it to the cloud with one command.

In this talk, we will go on a journey in the future of the core web vitals potential member INP, which will help in improving the interactions in all interactions in the session's lifetime, not only the first input delay as in the FID, showing some case studies and a way to optimize your website for INP, you will go away with a bunch of recommendations to do immediately

Lint rules enable us to uphold code quality and minimize errors. It can positively impact developer productivity and happiness especially when working in a massive application with multiple teams working together. But what if your large scale application contains thousands of lint failures over the many years it has been running in production? This talk will explore actionable strategies for effectively addressing lint failures at scale so that we can once again rely on lint rules to ensure consistent code quality and streamline development processes, leading to a more robust and maintainable codebase.

What is suspense for data fetching in React? Why does React's model make creating network requests during render so difficult? Why does (to the presenter's knowledge) no library besides Relay support this, despite its sheer convenience? In this talk, Robert will discuss how React renders components (especially with regards to Suspense), and how to build a data-fetching library that functions correctly in light of those behaviors.

In this talk, we will explore how Valtio can simplify your React state management by providing a minimalist and performant solution. We will cover the basics of Valtio, including how to create and update a store and how to access and modify the store from your components. We will also dive into some advanced Valtio features, such as subscribing to changes in the store, andusing memoization to optimize your components' performanc. By the end of this talk, you will have a solid understanding of how Valtio can make your state management more efficient and effective, allowing you to create scalable and maintainable applications.

The project started out great—the team was motivated, moving fast, and shipping features ahead of schedule. But little by little, complexity found its way in. Implementing small changes takes forever now, tech debt is piling up at an alarming rate, and everyone is losing confidence that the project will ever get done. Welcome to the messy middle.

These days everything has an app or website and users have come to expect perfection out of their UIs. With the bar so high, it can be overwhelming for those of us designing and building those experiences. Before you start building you need to choose fonts, type, spacing, and colours. What’s more, every decision you make seems to lead to even more options.

In this talk, we'll explore the powerful security feature of Content Security Policy (CSP) and how it can be implemented in Next.js to bolster your website's defenses against common web attacks like Cross-Site Scripting (XSS) and data injection. We'll cover the basics of CSP, its benefits, and best practices for implementing it in Next.js. Additionally, we'll share some tools to evaluate and test your policy. By the end of this talk, you'll have a solid understanding of how to level up your website's security with CSP and protect your users from the ever-present threats of the modern web.

You don't have to be a senior React developer to create a project and open source it! I'll show you how I built an event website with React and EUI, then shared it with the world for contributions and mentored folks who helped improve it.

When talking about contributing to open-source projects, it’s crucial to understand from a maintainer point of view what factors are stopping new contributors from contributing to your project. Whether your codebase is very overwhelming to the contributors for the first time or it  lacks good first issues and enough responsive response to their problems. In this talk, I will explain how I built a campaign at Amplication that scaled the contributors from 30 to 200 in just one year and how it solved every problem I mentioned above.

Finding mentorship when beginning your professional journey can be hard, yet it is so vital to have this support to build confidence, and grow at each stage of the process. 5+ years ago, Sidney reached out to me on LinkedIn with questions about bootcamps. I was finishing my first year at Stitch Fix and from that first GoogleMeet call, we have now met nearly every month and followed and supported each other throughout our respective journeys in engineering. We have never worked together, and we’ve never met!

We'll walk through what it takes to build a Node.js runtime for the browser, the challenges we discovered along the way and solutions we built to those challenges.

ASTs are prevalent in everything we do. ESLint, Typescript, etc allow us to dive into our source code in a way we might not be familiar with. Let's take a look at how some modern tools use ASTs to improve our lives as developers. Some of the tools to be covered include: TS-Morph, Typescript, TreeSitter, and ESlint.

Running tests on Node.js is common practice for app and library developers. But when your library is integrating more deeply with the platform, operating system or JS engine, you need to run tests “on device” increases. The Realm JS team at MongoDB is faced with this challenge, as we’re maintaining a React Native library with native modules. In this talk I’ll share the “mocha-remote” package which we’ve built to help us run tests “on device” while getting reporting and remaining in control from the comfort of our terminals.

In this talk Cecelia will walk through some options for integrating automation into your React Native deployments, including configuration, testing, code signing, and app store uploads. Whether you are just getting started with automation or want to build a full CI/CD pipeline, this talk will have tactical examples you can start using for your own React Native app.