Talks from our events
AI Coding Summit London
AI Coding Summit London
Jul 6 - 7, 2026
React Summit 2026
React Summit 2026
Jun 11 - 16, 2026
JSNation 2026
JSNation 2026
Jun 11 - 15, 2026
Web Engineering Summit 2026
Web Engineering Summit 2026
Jun 11 - 15, 2026
TechLead Conf Amsterdam 2026: Adopting AI in Orgs Edition
TechLead Conf Amsterdam 2026: Adopting AI in Orgs Edition
Jun 11, 2026
Node Congress 2026
Node Congress 2026
Mar 26 - 27, 2026
AI Coding Summit 2026
AI Coding Summit 2026
Feb 26 - 27, 2026
TechLead Conf London 2025: Adopting AI in Orgs Edition
TechLead Conf London 2025: Adopting AI in Orgs Edition
Nov 28, 2025
React Advanced 2025
React Advanced 2025
Nov 27 - Dec 1, 2025
React Summit US 2025
React Summit US 2025
Nov 18 - 21, 2025
JSNation US 2025
JSNation US 2025
Nov 17 - 20, 2025
AI Coding Summit 2025
AI Coding Summit 2025
Oct 23 - 24, 2025
Latest
All talks
The Last Software Engineer
AI Coding Summit LondonAI Coding Summit London
21 min
The Last Software Engineer
I'm not here to tell you software engineering is ending soon. Nobody can put a reliable date on that, and pretending otherwise is a distraction. But we also have to admit something humbling: a year ago, most of us would not have predicted coding agents would be this good. That should make u...
Automating Mobile QA with Cloud Agents
AI Coding Summit LondonAI Coding Summit London
17 min
Automating Mobile QA with Cloud Agents
This talk shows how to design and operate QA agents that run against real iOS and Android devices hosted remotely. We’ll cover the architecture of a reliable agent, connecting Linux-based infrastructure to mobile devices running on macOS, and integrating outputs like screenshots, recordings, and...
AI Reviews AI – Closing the Loop in Agentic Development
AI Coding Summit LondonAI Coding Summit London
28 min
AI Reviews AI – Closing the Loop in Agentic Development
AI-generated code is becoming the norm, but who reviews the reviewer? In this session, we explore how to close the feedback loop by letting AI agents review AI-written code. We'll look at local agent setups as well as cloud-based services like GitHub Copilot code review or Greptile, and discuss w...
React Performance Patterns That Break Down in Long-Running Production Apps
React Summit 2026React Summit 2026
20 min
React Performance Patterns That Break Down in Long-Running Production Apps
Himanshu discusses React performance patterns affecting long-running production apps, including memory leaks, event listener accumulation, state value consistency, and dependency array misuse. The talk highlights the risks of race conditions in API calls, uncanceled requests leading to data discrepancies, and the significance of abort controllers for improving app stability and addressing circular dependencies.
Building a JavaScript Engine in Rust: Lessons From Boa
JSNation 2026JSNation 2026
24 min
Building a JavaScript Engine in Rust: Lessons From Boa
Jason Williams, a senior software engineer at Bloomberg and TC39 delegate, discusses contributing to Servo project in Rust. The process of developing Boa JavaScript Engine involved highlighting its speed, memory safety, and performance compared to Gecko. Principles of building a JavaScript engine in Rust are compared to processing plants with stages like tokenization and parsing. Tokenization involves breaking down JavaScript code into tokens following the ECMAScript specification. Boa's community contributions focused on enhancing CPU caching, inline caching, and testing for conformance. The engine successfully implemented Temporal, achieving a high test pass rate and integration into major engines.
CLI, GUI, or Just Blind Trust? A Tour of Code Review Styles
React Summit 2026React Summit 2026
6 min
CLI, GUI, or Just Blind Trust? A Tour of Code Review Styles
Introduction to traditional code review methods and challenges faced by developers. Challenges with code review process and the shift towards AI era and CLI-based reviews. Using IDEs for code review, agentic era support, and enhancing code view for human-agent collaboration. New CodeRabbit view for code analysis, free for open source projects, support for old school and agentic engineers.
Open Source Voice AI: How We Built ChatGPT's Voice Mode Infrastructure
JSNation 2026JSNation 2026
20 min
Open Source Voice AI: How We Built ChatGPT's Voice Mode Infrastructure
Voice interaction with AI is evolving rapidly, focusing on creating natural conversation experiences with crucial time delays. Models in Voice AI are rapidly evolving, emphasizing the importance of latency budgets. Design decisions aim to minimize latency per stage, impacted significantly by network and backend location. Winning teams treat latency budgets like profit and loss statements, with user completion detection being crucial. Understanding VAD thresholds and turn detection importance to avoid frequent interruptions. Prioritizing interruption handling and efficient function calling for user engagement. Enhancing function call responsiveness and optimizing voice agent workflows for efficient task handling. Automated evaluations with LLM judge and observability prioritization for latency and audio replay. Development in Voice AI follows an iterative approach, starting narrow and expanding with an evaluation framework.
AI Can Generate Tests for You, Now What?
JSNation 2026JSNation 2026
22 min
AI Can Generate Tests for You, Now What?
Living in an exciting yet worrisome period, AI enhances productivity by generating tests. Considerations on scaling AI beyond test generation for high-quality products. AI simplifies test generation but raises quality concerns. Testing dependencies impact code validity. Overreliance on tests doesn't guarantee code safety. AI-generated tests may introduce hidden doubts. Workflow changes with AI assisting in performance, accessibility, benchmark, compliance, and setting up pipelines based on thresholds and risk assessments. Guidelines for working with AI as a team member, emphasizing the importance of standards, review checklists, and safeguarding code. Metrics, learning loops, and strategic improvement for better workflow scalability and testing model quality.
Real-Time Observability and Control for Coding Agents
AI Coding Summit LondonAI Coding Summit London
30 min
Real-Time Observability and Control for Coding Agents
Coding agents are quickly becoming part of day-to-day engineering work, but most people still lack visibility into what these agents are actually doing. Marius will share findings from Apollo’s research into tens of thousands of real-world coding agent traces: from direct security risks like dang...
A Brief History of Code Review (And What's Next)
JSNation 2026JSNation 2026
8 min
A Brief History of Code Review (And What's Next)
The Talk explores the transition from solo development to code review history, tracing it back to the Fagin Inspection process in the 1990s. It discusses the evolution of code collaboration from in-person meetings to remote, email-based discussions. The shift to modern code review via pull requests on GitHub improved collaboration efficiency. The integration of AI in code review enhanced processes and enabled instant feedback. Encouraging open source projects to adopt code review tools and prioritize the importance of thorough reviews is highlighted.
Featured
Trending today
From Prompt Engineering to Loop Engineering
AI Coding Summit LondonAI Coding Summit London
11 min
From Prompt Engineering to Loop Engineering
React Native as a Gaming UI System in Unreal Engine
React Advanced 2025React Advanced 2025
20 min
React Native as a Gaming UI System in Unreal Engine
Talk on React Native as a Gaming UI System in Unreal Engine, covering the integration journey, importance in mobile app development, and current methods of game UI creation. Innovative approach of rendering UI in games using a browser headlessly onto a texture. Challenges and benefits of using React Native for game UIs, including handling JavaScript overrides and showcasing a demo. Exploration of applying shaders to React Native UI in a gaming context and invitation to engage with React Native on Unreal Engine for future game development.
Giving AI Agents Hands: Mobile Feedback Loops with Agent Device
React Summit 2026React Summit 2026
26 min
Giving AI Agents Hands: Mobile Feedback Loops with Agent Device
The speaker discusses the evolution of AI agent workflow in mobile development, emphasizing the importance of feedback loops and verification. They highlight the challenges of human involvement as agents dominate code production. Agent Device simplifies mobile automation by focusing on accessibility trees and text-based actions. The tool enhances app verification, debugging capabilities, and provides advanced features like network issue identification. Agent Device is versatile for CI setup, feedback loops, and visual regression detection. It supports real devices and offers capabilities for migrations and automation. Additionally, the speaker compares flakiness and TV platform support, showcasing performance improvements over traditional tools.
Supercharge Your Debugging With the New Features in Chrome Devtools
JSNation 2025JSNation 2025
29 min
Supercharge Your Debugging With the New Features in Chrome Devtools
Barry Pollard
Ewa Gasperowicz
2 authors
Eva and Bari introduce the complexity of web development and emphasize the evolving nature of DevTools, discussing productivity gains through new features. The talk covers performance debugging enhancements and user-friendly changes in the performance panel. Live metrics screen offers real-time insights, integrating real user data for performance comparison. Configuring DevTools for accurate user emulation and leveraging performance trace capabilities for debugging. Enhancing user experience with AI insights and visual assistance, setting up AI workspace in DevTools. Addressing data privacy concerns and AI usage control. Chrome DevTools API and Gemini model enhancements, AI features specific to Chrome, web sockets throttling, and AI agent probing in performance context.
Not Your Everyday Tech Lead: What Does It Mean To Be TL in a Lean Software Company?
C3 Dev Festival 2024C3 Dev Festival 2024
20 min
Not Your Everyday Tech Lead: What Does It Mean To Be TL in a Lean Software Company?
The Talk discusses the role of a tech lead in a lean software company and the challenges they face. It emphasizes the importance of problem-solving and continuous improvement in software development. The speaker shares their personal struggles as a tech lead and the need to prioritize between being a maker and a manager. The Talk also highlights the significance of identifying root causes and solving problems to prevent future issues. Overall, it provides insights into the role of a tech lead and the role problem solving plays in creating optimal conditions for developers.
Optimizing HTML5 Games: 10 Years of Learnings
JS GameDev Summit 2022JS GameDev Summit 2022
33 min
Optimizing HTML5 Games: 10 Years of Learnings
Top Content
PlayCanvas is an open-source game engine used by game developers worldwide. Optimization is crucial for HTML5 games, focusing on load times and frame rate. Texture and mesh optimization can significantly reduce download sizes. GLTF and GLB formats offer smaller file sizes and faster parsing times. Compressing game resources and using efficient file formats can improve load times. Framerate optimization and resolution scaling are important for better performance. Managing draw calls and using batching techniques can optimize performance. Browser DevTools, such as Chrome and Firefox, are useful for debugging and profiling. Detecting device performance and optimizing based on specific devices can improve game performance. Apple is making progress with WebGPU implementation. HTML5 games can be shipped to the App Store using Cordova.
Skill Design for LLM Agents
AI Coding Summit LondonAI Coding Summit London
24 min
Skill Design for LLM Agents
What RSCs Can Do in Next.js Today
React Summit 2026React Summit 2026
36 min
What RSCs Can Do in Next.js Today
Aurora discusses the journey of React Server Components in Next.js, emphasizing the importance of composability and scalability. The shift to server-side data fetching with enhanced composability and declarative nature is explored. The significance of self-contained components for fast server-side data fetching and improved user experience is highlighted. NextGIS app router is discussed for enhanced performance and optimized data caching. Version 16 introduces cache components for optimized data caching and instant navigations. Improvement in user experience with Next 16.3 through app shells, partial prefetching, and instant insights is emphasized. The talk also covers new components and features for server-side rendering, optimizing loading speed, animations, and playlist integration in Next.js.
RSCs In Production: 1 Year Later
React Summit 2024React Summit 2024
24 min
RSCs In Production: 1 Year Later
Top Content
This Talk explores the experience of shipping server components in production and highlights the benefits and challenges of using Server Components in Next.js apps. The Talk discusses the deployment of UploadThing and the use of AppRouter for safe production usage. It delves into the implementation of different layouts, data fetching, and code centralization for improved performance. The Talk also covers the use of server components for performance optimization and latency handling. Additionally, it explores the use of Edge and Lambda for partial pre-rendering and the challenges faced with webpack performance and hydration. Overall, the Talk emphasizes the benefits and challenges of working with Server Components in Next.js applications.
Short takes
Deploy Your AI Code in Minutes
AI Coding Summit 2026AI Coding Summit 2026
7 min
Deploy Your AI Code in Minutes
Shifra guides the migration of a Repl.it app to Render with emphasis on simplicity and mock data. Ensure Render deployment requirements are met, including specifying root directory, build and start commands, and correct port. Configure GitHub repository setup, connect to Git, and create a repository. Confirm code in the repository and deploy on Render, showcasing a sample landing page.
MCPs: How to Avoid Security Pitfalls
AI Coding Summit 2026AI Coding Summit 2026
7 min
MCPs: How to Avoid Security Pitfalls
Gil Friedman from Backslash Security discussed MCP security, focusing on the Model Context Protocol and AI assistant security risks like GitHub token exposure in auto run mode. Security measures for MCP usage include setting autorun to ask every time, postmarking MCP incidents, handling malicious servers, safeguarding sensitive information, reviewing and disabling unused tools, requiring permission before triggering actions, removing MCP from environments, and revoking API keys when necessary.
Organic Leadership in the Age of AI: Why human Touch Becomes More Valuable Than Ever
TechLead Conf Amsterdam 2026: Adopting AI in Orgs EditionTechLead Conf Amsterdam 2026: Adopting AI in Orgs Edition
8 min
Organic Leadership in the Age of AI: Why human Touch Becomes More Valuable Than Ever
Reflecting on the integration of AI in software development and the implications for leadership and decision-making. AI integration in leadership: embracing context, judgment, and accountability. Principles: Context before output, Intent before optimization, Awareness before efficiency, Accountability before automation. Leadership as an ecosystem with roots, stem, and fruit; AI's role in each part. Using AI at different levels of leadership: fruit, stem, and roots. Decision-making needs context. Leadership bridges information and context gaps. AI for efficiency but human touch for depth and understanding.
Optimizing the Path From Design to Production in Engineering Workflows
React Summit US 2025React Summit US 2025
7 min
Optimizing the Path From Design to Production in Engineering Workflows
Akbar, developer advocate at Figma, highlights the importance of exploration, representation, and production in product development. Figma leverages design systems and AI tools for efficient transition from representation to production, optimizing expertise and automating non-critical tasks. Seamless integration between design elements and the app is achieved through tools like Code Connect and Copilot, fostering collaboration between design and code.
Video Optimization for the Web: The Missing Piece in Lighthouse
React Summit US 2025React Summit US 2025
7 min
Video Optimization for the Web: The Missing Piece in Lighthouse
Rahul introduces video optimization principles, emphasizing modern formats, compression, bitrate reduction, and lazy loading. ImageKit simplifies video loading by compressing videos significantly and adapting to network conditions. Pausing videos when not in view saves data costs and enhances user experience.
Ensuring Quality with AI
TechLead Conf Amsterdam 2026: Adopting AI in Orgs EditionTechLead Conf Amsterdam 2026: Adopting AI in Orgs Edition
7 min
Ensuring Quality with AI
Richard Rodenkemper, senior software engineer at Sentry, discusses ensuring quality with AI. GitHub data shows exponential growth in coding. Concerns arise about the reliability of coding agents versus human engineers. Impact of AI and Cloud on code production and app quality is questioned. Challenges in code reliability despite increased production are highlighted. AI as a quality tool in software development. Importance of reliability for product success highlighted. AI's strengths in handling data and searching code base discussed. Examples of AI usage in code reviews and quality assurance at Sentry shared. AI efficiency in endpoint deprecation and system updates highlighted. AI's assistance in migrating design systems and reducing notifications using Cloud Code emphasized.
Everyone Is Now a Manager - Interfaces in the World of Agents
TechLead Conf London 2025: Adopting AI in Orgs EditionTechLead Conf London 2025: Adopting AI in Orgs Edition
6 min
Everyone Is Now a Manager - Interfaces in the World of Agents
Sam Kmezverk's talk covers the evolving tech landscape, emphasizing key principles for agents' implementation in tasks and decision-making processes. Addressing challenges in agent orchestration, debugging system issues, and cultivating user trust are crucial for successful interface development.
Framework Native Rendering Without Code Duplication?
React Summit 2026React Summit 2026
6 min
Framework Native Rendering Without Code Duplication?
Talking about an experiment in Agigrid to render to multiple frameworks without duplicating code. Exploring MVC approach for structuring code base and handling view complexity efficiently. Exploring new ways to structure view logic and render components efficiently across frameworks within Agic Grid experiment.
Debugging Performance With AI
JSNation 2026JSNation 2026
6 min
Debugging Performance With AI
The talk explores using AI to address challenges in rendering performance optimization, highlighting the potential of tools like Chrome developer tools MCP. Leveraging AI with these tools can streamline the process and flatten the learning curve for developers. The approach of isolating performance issues through commit analysis, including systematic testing and synthetic stress tests, is emphasized as a practical method to identify and resolve rendering performance issues effectively.
Using Spec-Driven Development for Production Workflows
JSNation US 2025JSNation US 2025
7 min
Using Spec-Driven Development for Production Workflows
We're discussing spec-driven development and the innovative AI IDE, QIRO, that supports this approach. QIRO focuses on structured specifications before coding, aiding developers in creating designs. The QIRO mascot, a playful ghost, symbolizes the essence of spec-driven development. Eric Hanchett discusses QIRO, emphasizing its spec-driven development feature integrated into the IDE. QIRO aids in in-depth feature planning, resembling a structured requirements approach. Coding assistants benefit from detailed examples for efficient development. Exploring Manual Coding Assistance: Creating user requirements, building design documents, and task lists manually. Example of using spec mode in a coding assistant to break down requirements, create designs, and implement features.
Popular
React
Modernizing Your React App: Compiler, useEffectEvent, Activity & Friends
React Summit 2026React Summit 2026
27 min
Modernizing Your React App: Compiler, useEffectEvent, Activity & Friends
Victor shares experiences inheriting codebase and explains the importance of React's updates for code cleanliness. Agenda includes React evolution, API usage, modernization playbook, and insightful discussions. React 19 impact on React's evolution towards a declarative model for state management and form handling. React's shift towards a declarative model, impacting form handling and state management with React 19 updates, including new APIs and the importance of the React compiler for efficient development. Using React compiler for efficient development and code simplification. Measuring code base changes with memorization hooks identification. Introducing user fact event API for dependency-free code. Handling state persistence challenges with the Activity API for seamless user experiences and resource management. Utilizing the Activity API for precise state management and resource optimization in React Native applications. Exploring powerful user cases: tabs example, pre-rendering, and back navigation benefits with the Activity API. Exploring the value of instant experiences with back navigation and code optimization through API adoption. Measuring success, avoiding AI dependence, and understanding the importance of learning for effective development. Addressing challenges post-AI era, emphasizing responsibility in learning, maintaining control, and ensuring security. Practical steps include using React compiler, auditing code for Activity API integration, and optimizing data flow for enhanced user experience.
Lessons From Adopting React Compiler
React Summit US 2025React Summit US 2025
23 min
Lessons From Adopting React Compiler
Akash Hamilwasia presenting at React Summit 2025, shares React Compiler learnings and works on an AI audio platform. Memoization in React helps optimize UI performance by preventing unnecessary re-renders. React Compiler offers automatic memoization through static code analysis. React rules emphasize purity and immutability. The compiler analyzes and memoizes code changes for optimization. React Compiler package usage improves performance through code analysis. Understanding reactivity issues is crucial for handling React state. Compiler optimization requires correct dependency arrays and usage of external libraries. Measure React Compiler impact using React Profiler for optimization and real user impact analysis.
Giving AI Agents Hands: Mobile Feedback Loops with Agent Device
React Summit 2026React Summit 2026
26 min
Giving AI Agents Hands: Mobile Feedback Loops with Agent Device
The speaker discusses the evolution of AI agent workflow in mobile development, emphasizing the importance of feedback loops and verification. They highlight the challenges of human involvement as agents dominate code production. Agent Device simplifies mobile automation by focusing on accessibility trees and text-based actions. The tool enhances app verification, debugging capabilities, and provides advanced features like network issue identification. Agent Device is versatile for CI setup, feedback loops, and visual regression detection. It supports real devices and offers capabilities for migrations and automation. Additionally, the speaker compares flakiness and TV platform support, showcasing performance improvements over traditional tools.
Gotta Go Fast: React at 60 FPS
React Summit 2026React Summit 2026
16 min
Gotta Go Fast: React at 60 FPS
Rachel Kaufman discusses animating in React without libraries for high performance. Client project for the International Spy Museum involved facial recognition education using React. React's unconventional use for complex UI animation in museum exhibits. Optimizing animation performance in React with request animation frame and using canvas for drawing. Managing continuous animations in React for smooth transitions. Leveraging canvas and refs for drawing and direct DOM access in React. Implementing complex animations with refs and request animation frame in React. Using memo and request animation frame for preventing unnecessary re-renders. Automating React debugging with Chrome DevTools and performance analysis with console.time.
Real-World Hydration and Rendering Patterns in Modern React Apps
React Summit 2026React Summit 2026
20 min
Real-World Hydration and Rendering Patterns in Modern React Apps
One of the exciting things about web development is that the underlying technology that we use is constantly evolving. It’s hard to believe, but Server Components, partial hydration and hybrid rendering are no longer experimental features and are here to stay. With more projects adopting these ne...
React on the Edge
React Summit 2026React Summit 2026
17 min
React on the Edge
Welcome to React on the Edge with Amir Sami from S&C Electric exploring React applications for diverse Edge devices beyond browsers. The discussion covers deploying React apps to various Edge devices, addressing challenges like network stability and resource limitations, optimizing bundle size with Preact, and using Brotli compression for efficient web asset compression on Edge devices.
From Segments to Suspense: The Future of Next.js Caching
React Advanced 2025React Advanced 2025
27 min
From Segments to Suspense: The Future of Next.js Caching
Introduction to Cache Components in Next.js 16, transforming the app router with new features like partial pre-rendering, Dynamic I.O., and caching directives. Deep dive into static params generation in Next.js focusing on changes in generating static params for improved performance. Exploring challenges of generating static params and balancing static vs. dynamic rendering for better performance. Addressing challenges with cache components, optimizing static and dynamic rendering for improved performance. Understanding impact of parameters on rendering with cache components, managing dynamic components, and introducing suspense boundaries for faster page loads. Enhancing cache life APIs, introducing a new caching model for static outputs in Next.js. Revolutionizing cache management with granular control over cache lifetimes and dynamic segment configuration. Navigating data and caching in Next.js, exploring cache components guidance and caching differences between server and client components.
Conquering React Concurrency
React Summit 2026React Summit 2026
25 min
Conquering React Concurrency
The talk at React Summit 2026 by Ariel covers the importance of React concurrency in improving user experience. It delves into the concepts of concurrency, contrasting it with parallelism, and emphasizes the historical relevance of efficient task handling, like the McDonald's kitchen design in 1942. Operating systems use round-robin scheduling for fair process execution. React 18 addresses user impatience and rendering challenges through concurrency. The evolution of React's rendering process from stack reconciliation to fiber reconciliation is highlighted, emphasizing the role of Suspense in managing work prioritization and background rendering efficiently.
Suspenseful Component Composition
React Summit US 2025React Summit US 2025
12 min
Suspenseful Component Composition
Simeon Griggs discusses Suspenseful Component Composition, the use of fallback props, and the basics of suspense in React applications with a demo showcasing data fetching and layout shifting. Exploring issues with data fetching and suspense boundaries. Addressing the challenges of using suspense boundaries and data fetching for individual rows in React applications. Creating consistent fallback elements for smooth loading experiences in tables by aligning sizes and optimizing data fetching placement. Optimizing data fetching placement for smoother loading experiences. Consider exporting suspense boundary to enhance code cleanliness and be defensive against data fetching errors. Use error boundaries to handle errors in suspenseful data fetching components for a smoother user experience.
Plug and Play Design: Building Extendable React Applications
React Summit US 2025React Summit US 2025
29 min
Plug and Play Design: Building Extendable React Applications
Mateusz Jagodziński, principal developer at Synergy Codes, shares insights on Plug and Play Design Building Extendable React Applications, discussing feature flags, modularity, and real-world use cases. Challenges of feature flags, the concept of alternative modular design for feature management, and the importance of modularity in code organization and development. Configurability and limitations in feature management, showcasing a plugin-based design for flexible tool versions and code manipulation. Explanation of plug and play design for code manipulation and version control with full type safety in TypeScript projects. Exposing functions to register new plugins, organizing plugins' logic within individual folders, and implementing a build setup with a replacement mechanism for plugin files. Replacing missing plugins with a fallback code, enforcing restriction on direct plugin imports, and visualizing the relationship between plugins, adapters, and application components. Exploring pros and cons of self-contained plugins, addressing implementation overhead, and discussing the value of enforced modularity for AI coding tools. Discussing plugin management decisions based on client needs and the scalability of the approach with changing requirements and minor tweaks. Handling plugin version tracking, automated testing challenges, and feature control based on environments. Adapters and maintaining plugin compatibility through iterations and cosmetic changes, leveraging existing solutions for simplicity. Discussing the implications of not shipping separate builds for multiple customers and considering the benefits of smaller bundle size. Exploring the ease of trying out new features with separate plugins to assess overhead and developer experience.
Node.js
Node.js: More Threads Than You Think
React Advanced 2025React Advanced 2025
32 min
Node.js: More Threads Than You Think
The talk covers a range of topics including Node.js evolution to a multi-threaded system, scaling with the cluster module, managing PM2 for efficient orchestration, challenges in SSR frameworks, TCP SO reuse port for resource utilization, VAT architecture for smart service routing, zero downtime deployment with shared cache, performance benchmark results, PM2 performance challenges, legality and functionality of TCP SO reuse port, kernel balancing considerations, tool comparison between PM2 and Deno, cache consistency challenges, VAT architecture with worker thread recovery, T-scaling for vertical scaling, and updating Node V6 applications.
JavaScript File Handling Like a Pro: From ZIP Streams to Memory-Efficient Parsing
JSNation US 2025JSNation US 2025
24 min
JavaScript File Handling Like a Pro: From ZIP Streams to Memory-Efficient Parsing
Node.js offers significant capabilities for efficient file handling, emphasizing the importance of processing files effectively to avoid crashes and memory issues. Understanding streams, backpressure, and stream concepts like readable, writable, duplex, and transform streams is crucial for efficient file handling. Streams enable working with data in chunks, ensuring stable memory usage and efficient applications. Backpressure in streams optimizes memory usage by processing data incrementally, unlike loading entire files into memory. Utilizing readable streams in processing improves concurrency and avoids blocking the event loop.
Unlocking the Power of the Dependency Graph
Node Congress 2026Node Congress 2026
19 min
Unlocking the Power of the Dependency Graph
Rui Adorno emphasizes the power of dependency graphs in JavaScript projects, highlighting the underutilized graph structure and the importance of understanding metadata. The discussion delves into advanced dependency selector syntax, integrating query language with VLT client for updates and additions, running tests, and updating versions. The exploration of VLT client features includes secure package installs, phased installation processes, and DSS capabilities. Multi-project package filtering is expanded through DSS query language with a host local selector for benefits like script inspection and AI agents.
The State of Node.js 2025
JSNation US 2025JSNation US 2025
19 min
The State of Node.js 2025
Matteo Collina presents an updated talk on Node.js, discussing roles, open-source projects, and dispelling myths. He highlights Node.js vitality, contrasts with legacy technologies like COBOL and jQuery. The talk covers Node.js popularity, software reuse, module growth, and download stats. It addresses risks of not updating Node.js, LTS support phases, version updates, adoption rates, security measures, Node 24 features like ESM support and stable permissions. Collaboration processes, TSC role, governance, and benefits of Platformatic VAT for app development are also discussed.
Node.js + TypeScript: A Native Integration Years in the Making
JSNation US 2025JSNation US 2025
19 min
Node.js + TypeScript: A Native Integration Years in the Making
Welcome to JS Nation. Marco Ippolito discusses NodeJS and TypeScript integration, challenges, and growth. TypeStripping in Node.js removes TypeScript syntax for execution. Efficient TypeStripping in Node 22 skips SourceMaps, aligns with TypeScript versions. Enhanced features in Node 22 support experimental TypeScript features with limitations. Node.js supports TypeScript features with erasable syntax and namespace in Node 23.8. Importing types correctly crucial to avoid errors. Node.js TypeScript integration update includes switching to TypeScript, browser support, and community involvement.
Stop Paying for AI APIs: npm Install Your Way to In-Process Inference
Node Congress 2026Node Congress 2026
26 min
Stop Paying for AI APIs: npm Install Your Way to In-Process Inference
Introduction by Ed Silva, a Node.js core collaborator, discussing the significance of AI in 2026. Companies facing challenges in AI implementation, focusing on AI integration and the need for developer skills. Demonstrations of Node.js egg cooking using Hug and Face community and model inference with Hug and Face Transformers. Transformers JS extending NLP to computer vision and audio tasks, utilizing O-N-N-X format for model execution. Tasks and examples available in Transformers.js for NLP and computer vision, emphasizing model differentiation and execution processes. Optimization techniques for model download trade-offs, GPU utilization, and experimentation possibilities with models like Hugging Face.
Breaking the Context Ceiling: Implementing Recursive Language Models with LangGraph and TypeScript
Node Congress 2026Node Congress 2026
21 min
Breaking the Context Ceiling: Implementing Recursive Language Models with LangGraph and TypeScript
Jamal Legaro discusses challenges with context windows in language models and recursive language models as a solution. Enhancing language model performance through metadata and summaries, orchestrator copies, and comparing scaffold and RLM approaches. Efficient management of language model operations with slicing, recursion, code execution, and context window handling. Graph-based workflow design in Langchain for agent connections and state management. Workflow management, document analysis, and using RLM for processing large documents. Detailed workflow setup, code structure with Langsmith, and node definitions with RLM benefits for cost considerations and production readiness.
Life of an ESM in Node.js – and How It's Changing for the Better
JSNation 2026JSNation 2026
29 min
Life of an ESM in Node.js – and How It's Changing for the Better
Talk about the fundamentals of ESM in Node, Node's resolution process for imports, challenges with TypeScript and Node's resolution, customizing module resolution in Node, handling source code loading, loading and parsing modules in Node, module compilation and dependencies, bytecode reuse and instantiation in Node and V8, revamping API design and ESN namespace mutability, deferred evaluation and idempotency in ESM, ESM misconceptions and circular dependencies, and the future of TypeScript loading and performance improvements.
From Legacy to Delight: The Future of Node.js DX
JSNation 2026JSNation 2026
21 min
From Legacy to Delight: The Future of Node.js DX
Claudio Bunder emphasizes the importance of Node.js documentation, highlighting its impact on the ecosystem and the challenges in maintaining it. Node.js API documentation tooling faces significant design and implementation hurdles, with a lack of documentation hindering user interaction. The transformation of Node.js API documentation was driven by the need to improve user experience. Dockit, an AST engine, streamlines API documentation generation with support for Markdown, JS Doc, and TS Doc, offering modular flexibility and community-driven documentation creation. Dockit's efficient processing of document structures and metadata, combined with a generator system, ensures high performance and scalability in API documentation generation.
The State of Node.js Security
Node Congress 2026Node Congress 2026
27 min
The State of Node.js Security
Introducing Node.js security overview, defining vulnerabilities, non-vulnerabilities, and preventive measures. Discussing Node.js API input validation, real vulnerabilities like HTTP server crashes, and the importance of Node.js security in widely used platforms. Discussing the importance of Node.js maintenance, the introduction of experimental permissions in Node.js 20, and the seatbelt philosophy to protect against malicious code. Discussing the importance of maintaining up-to-date Node.js versions and using tools like npx isMyNodeVulnerable for security checks. Discussing the importance of Node.js security releases, funding, and dependency vulnerability assessment for a safer Node.js environment. Using Node.js Dependency Vulnerability Assessment to evaluate and address potential vulnerabilities, ensuring automated security checks and updates for a safer Node.js environment. Automating Node.js security release process, including configuration files for dependencies, extensive testing across various environments, and creating security release issues and blog posts automatically. Support for various environments, extensive testing with over 55 suites and 5,000 unit tests, automation efforts to streamline processes, and the establishment of a maintenance threat model for enhanced security measures. For a single pull request, it takes six hours to run tests, automation efforts in progress, maintenance threat model to address security risks, permission model roadmap, ongoing discussions on security reports, and plans for the Node.js Collaborator Summit. Active community involvement in Node.js security development, four security releases from 2024 to 2026 addressing various vulnerabilities, end-of-life version strategy with Node.js 16 and 18 having high weekly downloads, and the approach to issuing CVEs for end-of-life versions. Node.js project's strategy adjustment for CVEs to include end-of-life versions, importance of Node.js threat model, trust boundaries, and developer responsibilities. Node.js protection against network data, upgrade recommendations for different Node.js versions, and upcoming changes in Node.js release schedule.
Testing
Fast-Tracking Quality for Hundreds of React Applications With Automated Testing Layers
React Advanced 2025React Advanced 2025
29 min
Fast-Tracking Quality for Hundreds of React Applications With Automated Testing Layers
Discussion on improving release cycles and testing efficiency, transitioning to React Native, quality assurance challenges addressed through redefined responsibilities and test automation, shift-left approach for early testing and diversification of automated tests, efficient test execution with caching strategies, impact of caching on CI performance, efficiency with change recognition and caching, project-specific approaches for testing, test optimization with AI and Pyramid test structure, QA team transitioning to engineering, handling unautomated tests and test association, maintaining test stability with Git revert strategy.
Automated Accessibility Testing in React: Beyond the Basics
React Advanced 2025React Advanced 2025
9 min
Automated Accessibility Testing in React: Beyond the Basics
Introduction to Accessibility Testing in React applications, emphasizing early automation and challenges in scaling. Importance of instant feedback, Unity test, and entry testing for code accessibility. Utilizing end-to-end testing tools like Jest-Axi and Cypress to ensure accessibility compliance. Emphasis on manual testing alongside automated tools. Encouragement for discussions on LinkedIn to enhance accessibility knowledge.
Ashes to Ashes, Spec to Spec: The Rebirth of Modern Testing
React Summit 2026React Summit 2026
29 min
Ashes to Ashes, Spec to Spec: The Rebirth of Modern Testing
Gathering to bid farewell to Mocha, Jest, and Karma. From minimalism to Jest's migration with Vitest as the most popular framework. Yunus emphasizes finding the right balance in software tools like Angular and NX. Discussion on transitioning from Jest to VTest with a focus on careful approach and test migration efficiency. Insights on debugging mocks, object mothers, and the use of Wallaby JS for debugging in VTest. Exploring test control, browser debugging, configurations, troubleshooting user events, automation with Playwright, and VTest's automation engine. Focus on unit testing speed, scope, and complexity rules, IDE tools like WallabyJS, and GitWipe alias for development reset.
The 2025 State of JavaScript Testing
JSNation US 2025JSNation US 2025
27 min
The 2025 State of JavaScript Testing
Speaker reflects on the importance of testing, shares insights from the state of JS survey, and discusses future plans for JavaScript testing in 2025. Companies are exploring testing tools and methodologies based on surveys and personal data. Evolution of testing practices from browser to node-based environment with VTest adoption. Advancements in testing technology include VTest's role, Playwright for end-to-end testing, and comprehensive testing solutions. Progress in self-healing tests, AI integration, and tool resurgence like Storybook and MSW for API mocking. Diverse opinions on testing in 2025, with a focus on static analysis, VTest, and end-to-end testing resurgence to browser.
Think Like a Tester: What to Look For in AI-Generated Code
JSNation 2026JSNation 2026
16 min
Think Like a Tester: What to Look For in AI-Generated Code
Developers and QA engineer Wendy discuss the challenges in development and testing, using John's experience as an example. John encounters challenges with expired coupons affecting the checkout process and sprint deadlines. Developers and testers have complementary perspectives in software development; introducing the concept of QAI for enhanced quality assurance and collaboration. The QAI introduces a new perspective to code development, focusing on thorough alignment and error scanning for enhanced quality assurance. The importance of code alignment in development, the consequences of silent failures, and the necessity of handling potential hidden failures with a security-focused approach. AI builds fast and trusts everything, teaches suspicion, identifies trust gaps, and addresses accessibility failures for a secure code environment. Every team has patterns to anticipate, leveraging skills for immediate help, and focusing on effectiveness and protection in AI development. John and I collaborate using QAI to enhance code effectiveness, prioritize code alignment, fix contradictions, and address hidden failures effectively. Ship clean code timely, find bugs early to save time and trust. AI and QAI enhance speed and safety in development. Wendy emphasizes the importance of detecting bugs early and the impact on user trust and deadlines.
A Leak in the Shell – How Refactoring Autocomplete Broke Us and How We Fixed It
JSNation 2026JSNation 2026
26 min
A Leak in the Shell – How Refactoring Autocomplete Broke Us and How We Fixed It
The speaker presents a project to enhance autocomplete in a database CLI using TypeScript, discusses challenges with memory errors in testing, delves into Node.js memory management, explores system contexts and heap snapshots, examines JavaScript memory retention, evaluates the impact of context and eval on memory, uncovers Node.js core bugs and memory leak testing complexities, highlights the use of HeapSnapshots for memory leak detection, emphasizes the importance of application understanding in debugging, and stresses the significance of testing procedures and managing separate heaps.