React Trends in 2024

The year 2024 got me excited about React's ecosystem again. Despite the various challenges and dramas (the biggest one of them moving React to the server with React Server Components) we had last year, there are emerging React trends that everyone should have on their watchlist.

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The Great ESLint v9 Migration Adventure: A Developer's Survival Guide 🧗‍♂️

As a frontend developer who has spent years working with complex TypeScript codebases, I’ve learned that solid linting is essential for maintaining long-term code quality.

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Next.js vs TanStack

See this post for inspiration. Over the past few months, I’ve moved as much code as possible away from Next.js. While I see why people are attracted to it and its growing ecosystem, I am no longer sipping the KoolAid.

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Unlock exciting use cases with the Document Picture-in-Picture API

The Document Picture-in-Picture API (Document PiP API) lets web applications open a floating, always-on-top window (a picture-in-picture window) that can display any arbitrary HTML content.

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AI's effects on programming jobs

There's been a whole lot of discussion recently about the impact of AI on the market for web developers, for programmers in general, and even more generally the entire labor market.

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How to get deep traces in your Node.js backend with OTel and Deno

One important facet of running production software is observability—monitoring logs, traces, and metrics so you can identify and fix issues quickly. In Node.js servers, adding observability isn’t trivial. You have to add instrumentation code, modify your logger, and configure various services.

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Building APIs with Next.js

This guide will cover how you can build APIs with Next.js, including setting up your project, understanding the App Router and Route Handlers, handling multiple HTTP methods, implementing dynamic routing, creating reusable middleware logic, and deciding when to spin up a dedicated API layer.

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How GitHub engineers learn new codebases

No matter where you are in your coding career, you will likely come across a new codebase or problem domain that is completely unfamiliar to you. Because codebases can be filled with many layers of design patterns, bugfixes, and temporary workarounds, learning a new one can be a time-consuming and frustrating process.

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How ECMAScript Engines Optimize Your Variables

In this post, we will dive into how ECMAScript engines store variables, go over storage optimizations, and learn about scope analysis. If you are an ECMAScript developer, you will get some practical tips to improve the performance of your code.

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Abusing SQLite to Handle Concurrency

SkyPilot uses the venerable SQLite for state management. SQLite can handle millions of QPS, and terabytes of data. However, our efforts to scale our Managed Jobs feature ran up against the one downfall of SQLite: many concurrent writers.

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How the Jotai Store API Is Inspired by the WeakMap API

The Jotai store API was introduced in Jotai v2. Before v2, it was an internal API. Jotai conceptually functions like a WeakMap, and the store API is designed to reflect that. By the way, Jotai’s implementation internally uses multiple WeakMaps.

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I use Cursor daily - here's how I avoid the garbage parts

AI for coding is in a weird spot right now. You get people claiming that you can build a complete SaaS in 3 days, and others saying that it's worse than useless. Both of these people are probably just exaggerating or straight up lying.

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Astro 5.4

Astro 5.4 brings remote image optimization in Markdown, enhanced security for dev and preview servers, RegExp support for Vercel ISR excludes, and more! To upgrade an existing project, use the automated @astrojs/upgrade CLI tool.

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The URL is a great place to store state in React

Here’s what we want to achieve: Let’s say we have a modal (dialog) component that allows the user to perform some important actions which are part of the core flow. We would like the modal to stay open even after the user reloads the page.

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Introducing agents.json

Enabling AI agents to interact with APIs is difficult. We faced the same problem as many others building agents: altering APIs to work reliably with LLMs and executing multiple API calls successfully in a row is a trial and error process.

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Beyond React.memo: Smarter Ways to Optimize Performance

When it comes to React performance optimization, React.memo is often the first tool developers reach for. It’s the hammer we grab when we notice re-render issues, and suddenly everything looks like a nail.

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Crossy Road with React Three Fiber

In this tutorial, we learn how to create a simplified clone of the mobile game Crossy Road with React Three Fiber. The goal of the game is to move a character through an endless path of static and moving obstacles. We have to go around the trees and avoid getting hit by a car or a truck.

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How The New York Times systematically migrated from Enzyme into React Testing Library

As part of our efforts to maintain and improve the functionality and performance of The New York Times core website, we recently upgraded our React library from React 16 into React 18.

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Angular 19.2 Is Now Available

And we’re back with Angular’s latest minor release, version 19.2, bringing new APIs and experimental features to empower developers on their next great app. In Angular v19 we released the experimental resource API, continuing our reactivity story to a new chapter — asynchronous reactivity.

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Build Your First MCP Tool in Cursor in Just 2 Minutes

Cursor's AI is powerful, but it can't do everything. What if you could give it the ability to interact with your specific workflows, tools, and data? This lesson shows you how to do exactly that by building a custom MCP tool – and we'll do it in under two minutes!

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The DeepSeek Series: A Technical Overview

The appearance of DeepSeek Large-Language Models has caused a lot of discussion and angst since their latest versions appeared at the beginning of 2025. But much of the value of DeepSeek's work comes from the papers they have published over the last year.

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Node just added TypeScript support. What does that mean for Deno?

Node.js recently added native TypeScript support in version 22.6 (stabilized in 23.6), a welcome enhancement simplifying setups for TypeScript users. This has sparked questions within the community about how Node’s new capabilities compare with Deno’s existing TypeScript integration.

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What is Model Context Protocol (MCP)? How it simplifies AI integrations compared to APIs

MCP (Model Context Protocol) is a new open protocol designed to standardize how applications provide context to Large Language Models (LLMs). Think of MCP like a USB-C port but for AI agents: it offers a uniform method for connecting AI systems to various tools and data sources.

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JavaScript Fatigue Strikes Back

In recent months, I’ve returned to writing code daily. It’s been a lot of fun. While I enjoy Swift, Python, and Ruby, we’ve been building in TypeScript lately since it’s a good fit for our latest project.

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how to gain code execution on millions of people and hundreds of popular apps

this started when i was looking into cursor, an ai text editor. also, i use lulu by objective-see on my laptop, so when i downloaded the cursor installer, i got this pop-up. now, what the hell is todesktop? i thought i was downloading cursor? well, looking at their website, they seem to be an electron app bundler service alongside providing a SDK for electron apps. so it appears the installer i downloaded is actually managed by todesktop, not cursor.

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Building APIs with Next.js

This guide will cover how you can build APIs with Next.js, including setting up your project, understanding the App Router and Route Handlers, handling multiple HTTP methods, implementing dynamic routing, creating reusable middleware logic, and deciding when to spin up a dedicated API layer.

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What is TypeScript? An overview for JavaScript programmers

Read this blog post if you are a JavaScript programmer and want to get a rough idea of what using TypeScript is like (think first step before learning more details). You’ll get answers to the following questions: Note: This blog post does not explain why TypeScript is useful.

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Announcing TanStack Form v1

We're excited to announce the first stable version of TanStack Form is live and ready for usage in production! 🥳 We support five frameworks at launch: React, Vue, Angular, Solid, and Lit, as well as a myriad of features for each specific framework.

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10 Things To Avoid in Domain-Driven Design (DDD)

DDD is an important strategic approach to software development. In this article, explore 10 things to avoid in DDD and examples to illustrate these pitfalls. Domain-Driven Design (DDD) is an important strategic approach to software development.

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Variants of LoRA

Want to train a specialized LLM on your own data? The easiest way to do this is with low rank adaptation (LoRA), but many variants of LoRA exist. There are many variants of LoRA you can use to train a specialized LLM on your own data.

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Truth, Lies and Progress Bars

Very early in my career, I found myself on a design team tasked with improving some legacy security software. At one point, we were evaluating a setup screen that included a progress bar. I asked a member of the engineering team, “How is progress calculated?”

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Building WebSites With LLMS

I recently shipped some updates to my blog. Through the design/development process, I had some insights which made me question my knee-jerk reaction to building pieces of a page as JS-powered interactions on top of the existing document.

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Avoiding Server Component Waterfall Fetching with React 19 cache()

The cache() API is a new feature released in React 19. In this blog post, we will explore it in the Next.js App Router, and see how it can be used to reduce data coupling and preload data, optimizing performance and avoiding waterfall fetching when using React Server Components.

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Subverting control with weak references

Weak references are neat. The best language features unlock different kinds of abstractions, and weak references do exactly that. Let me show you why. In JavaScript we have two APIs to work with weak references: WeakMap and WeakRef.

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Rethinking Find-in-Page Accessibility: Making Hidden Text Work for Everyone

I regularly attend UX Graz (Meetup / LinkedIn), a meetup covering diverse UX-related topics, alternating between in-person and remote events. At one recent event, a blind speaker demonstrated how they navigate websites (on LinkedIn).

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How Core Git Developers Configure Git

A few weeks ago I wrote about Git’s help.autocorrect setting and the strange tale of the origin of it’s deciseconds value. It got me to thinking about other git config settings that most people likely don’t know about and which should probably be defaulted differently.

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Making Cloudflare the best platform for building AI Agents

As engineers, we’re obsessed with efficiency and automating anything we find ourselves doing more than twice. If you’ve ever done this, you know that the happy path is always easy, but the second the inputs get complex, automation becomes really hard.

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Sunsetting Create React App – React

Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework. We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework.

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React Libraries for 2024

React has been around for quite some time, and over the years, an extensive—yet sometimes overwhelming—ecosystem of libraries has grown around it. Developers transitioning from other languages or frameworks often struggle to navigate all the libraries needed to build web applications with React.

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State of React Native 2024

2024 was a year of significant updates and improvements in the ecosystem, beyond the New Architecture. All the libraries' authors released many impactful updates, further stabilizing and reshaping parts of the ecosystem.

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Comparing local large language models for alt-text generation

I have 10,000 photos on my website. About 9,000 have no alt-text. I'm not proud of that, and it has bothered me for a long time. When I started my blog nearly 20 years ago, I didn't think much about alt-texts.

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Learning web extensions

I blinked and the first month of 2025 went by. NGL, 2024 was…challenging. So forgive me for choosing to just shut down during the end of last year. But I did do some things that I thought were worth sharing and I have deferred that until now.

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Migrating 160,000 Lines of Production Banking JavaScript to TypeScript with Zero Downtime

TypeScript has become the de facto standard for building robust, maintainable, and scalable JavaScript applications. Yet, migrating a large production codebase to TypeScript can be a daunting task, especially when you're dealing with 160,000 lines of mission-critical JavaScript and users with real money in your system, and their tax returns to submit.

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The State of AI in the Cloud 2025

Based on the sample size of hundreds of thousands of public cloud accounts, our second annual State of AI in the Cloud report highlights where AI is growing, which new players are emerging, and just how quickly the landscape is shifting. 85% of organizations are using some form of AI.

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My Experience as a Designer Working at Bit

As the Senior UX/UI Designer at Bit using Bit’s tools for development, I’ve had the unique opportunity to work in an environment where design and development are seamlessly aligned.

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Automated architecture diagrams

Often an organisation’s technical systems have a complex dependency graph, which is not always easy to discover and reason about. And the biggest issue of all -> Are these diagrams still up to date????

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When Imperfect Systems are Good, Actually: Bluesky's Lossy Timelines

Often when designing systems, we aim for perfection in things like consistency of data, availability, latency, and more. The hardest part of system design is that it’s difficult (if not impossible) to design systems that have perfect consistency, perfect availability, incredibly low latency, and incredibly high throughput, all at the same time.

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Svelte 5 is not Javascript

For the last couple of weeks, I've been dealing with the fallout of upgrading a web application to Svelte 5. Complaints about framework churn and migration annoyances aside, I've run into some interesting issues with the migration.

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Visualizing Data Is An Art - We Should Treat It Like One

As we teeter towards a post-truth world, I've been thinking about how we communicate information and specifically the role data visualization plays. In its modern form, it's a surprisingly young field that sits at the intersection of art and science. Much of the lexicon is actively being written and, perhaps counterintuitively, I'm going to advocate for a bit less science and a bit more art.

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How to harness APIs and AI for intelligent automation

APIs have steadily become the backbone of AI systems, connecting data and tools seamlessly. Discover how they can drive scalable and secure training for AI models and intelligence automation.

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