Why I Love Remix
kentcdodds.com is completely custom built by me (and team) using Remix. After writing tens of thousands of lines of code using this framework, I have developed a great appreciation for what this framework can do for me and the users of my site. I want to tell you about some of it. In a sentence Here's the core reason I love using Remix to build websites: Remix enables me to build amazing user expe
Today we’re excited to announce the release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript smaller, simpler, and faster. We’ve implemented the new decorators standard, added functionality to better support ESM projects in Node and bundlers, provided new ways for library authors to control generic inference, expanded our JSDoc functionality, simplified con
REST API Design Best Practices Handbook – How to Build a REST API with JavaScript, Node.js, and Express.js
By Jean-Marc Möckel I've created and consumed many API's over the past few years. During that time, I've come across good and bad practices and have experienced nasty situations when consuming and building API's. But there also have been great moments. There are helpful articles online which present many best practices, but many of them lack some practicality in my opinion. Knowing the theory with
Node.js has undergone a remarkable transformation since its early days. If you’ve been writing Node.js for several years, you’ve likely witnessed this evolution firsthand—from the callback-heavy, CommonJS-dominated landscape to today’s clean, standards-based development experience. The changes aren’t just cosmetic; they represent a fundamental shift in how we approach server-side JavaScript develo
Developers are increasingly relying on AI coding assistants to accelerate our daily workflows. These tools can autocomplete functions, suggest bug fixes, and even generate entire modules or MVPs. Yet, as many of us have learned, the quality of the AI’s output depends largely on the quality of the prompt you provide. In other words, prompt engineering has become an essential skill. A poorly phrased
WebKit Features in Safari 16.4
Mar 27, 2023 by Patrick Angle, Marcos Caceres, Razvan Caliman, Jon Davis, Brady Eidson, Timothy Hatcher, Ryosuke Niwa, and Jen Simmons ContentsWeb Push on iOS and iPadOSImprovements for Web AppsWeb ComponentsCSSHTMLJavaScript and WebAssemblyWeb APIImages, Video, and AudioWKWebViewDeveloper ToolingWeb InspectorSafari Web ExtensionsSafari Content BlockersNew Restrictions in Lockdown ModeMore Improve
How modern browsers work
Note: For those eager to dive deep into how browsers work, an excellent resource is Browser Engineering by Pavel Panchekha and Chris Harrelson (available at browser.engineering). Please do check it out. This article is an overview of how browsers work. Web developers often treat the browser as a black box that magically transforms HTML, CSS, and JavaScript into interactive web applications. In tru
Should You Stop Using Prisma? Why Database ORMs Might Be the Worst Thing That Happened to Backend Development I need to tell you something that might be controversial: Prisma, the darling of the TypeScript world, might be holding your application back. After three years of using Prisma in production, debugging performance issues that shouldn’t exist, and watching our serverless costs spiral out of
Assessing Claude Mythos Preview’s cybersecurity capabilities April 7, 2026 Nicholas Carlini, Newton Cheng, Keane Lucas, Michael Moore, Milad Nasr, Vinay Prabhushankar, Winnie Xiao Hakeem Angulu, Evyatar Ben Asher, Jackie Bow, Keir Bradwell, Ben Buchanan, David Forsythe, Daniel Freeman, Alex Gaynor, Xinyang Ge, Logan Graham, Kyla Guru, Hasnain Lakhani, Matt McNiece, Mojtaba Mehrara, Renee Nichol, A
The Fediverse has been a hot topic of discussion lately, with thousands, if not millions, of new users creating accounts on platforms like Mastodon to either move entirely to "the other side" or experiment and learn about this new social network. Today we're introducing Wildebeest, an open-source, easy-to-deploy ActivityPub and Mastodon-compatible server built entirely on top of Cloudflare's Super
IntroductionIn this article I describe a simple architecture for an early stage SAAS. As a solo founder, I report some choices made to launch Feelback, a small-scale SAAS for collecting users signals about any content. This article will cover the technical side of designing and running a simple SAAS. It will also include some details about coding and evolving the initial feature set ready at launc
Today we’re excited to announce our beta release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript, smaller, simpler, and faster. We’ve implemented the new decorators standard, functionality to better support ESM projects in Node and bundlers, new ways for library authors to control generic inference, expanded our JSDoc functionality, simplified configuratio
WebKit Features in Safari 17.4
ContentsArchitectural improvementsWeb AppsForm elementsCSSWeb APIJavaScriptMediaSVGWebGLWeb AssemblyWeb InspectorChanges to SafariSafari ExtensionsWeb AuthenticationBug Fixes and moreUpdating to Safari 17.4Feedback Just like Safari 15.4 and Safari 16.4, this March’s release of Safari 17.4 is a significant one for web developers. We’re proud to announce another 46 features and 146 bug fixes. You ca
1 Introduction Compilers, assemblers and similar tools generate all the binary code that processors execute. It is no surprise then that these tools play a major role in security analysis and hardening of relevant binary code. Often the only practical way to protect all binaries with a particular security hardening method is to have the compiler do it. And, with software security becoming more and
AST vs. Bytecode: Interpreters in the Age of Meta-Compilation
233 AST vs. Bytecode: Interpreters in the Age of Meta-Compilation OCTAVE LAROSE, University of Kent, UK SOPHIE KALEBA, University of Kent, UK HUMPHREY BURCHELL, University of Kent, UK STEFAN MARR, University of Kent, UK Thanks to partial evaluation and meta-tracing, it became practical to build language implementations that reach state-of-the-art peak performance by implementing only an interprete
Today we’re excited to announce our Release Candidate of TypeScript 5.0! Between now and the stable release of TypeScript 5.0, we expect no further changes apart from critical bug fixes. This release brings many new features, while aiming to make TypeScript, smaller, simpler, and faster. We’ve implemented the new decorators standard, functionality to better support ESM projects in Node and bundler
React Server Components bring server-exclusive capabilities to React. I've been using this new paradigm within Next.js 13 and 14, and what follows is my honest assessment of it[1]. I debated not publishing this post because of the way the React community has historically handled criticism. It is only recently that I decided it is important to share my thoughts, especially after seeing that much of
jQuery Attack Hits NPM and GitHub; Can Extract Web Form Data
jQuery Attack Hits NPM and GitHub; Can Extract Web Form Data The trojanized jQuery attack has been spread on npm, GitHub and elsewhere since May. A trojanized version of jQuery has been spreading on the npm JavaScript package manager, GitHub and elsewhere, for use in a jQuery attack, security researchers have discovered. Phylum researchers said they have been monitoring the “persistent supply chai
The proposal “Pipe operator (|>) for JavaScript” (by J. S. Choi, James DiGioia, Ron Buckton and Tab Atkins) introduces a new operator. This operator is an idea borrowed from functional programming that makes applying functions more convenient in many cases. This blog post describes how the pipe operator works and what its use cases are (there are more than you might expect!). The two competing pro
Lightweight Javascript Framework Review (For Django Developers)
Lightweight Javascript Framework Review (For Django Developers) The Full-Stack Django Series: How to Combine Frontend and Backend Lightweight Javascript Framework Review How to add Typescript to Django Django Favicon Guide How to Develop Responsive HTML Email in Django Django Form Validation Guide Introduction Many developers are confused when they try to find a Lightweight Javascript Framework fo
Persistent npm Campaign Shipping Trojanized jQuery | Phylum
Since May 26, 2024, Phylum has been monitoring a persistent supply chain attacker involving a trojanized version of jQuery. We initially discovered the malicious variant on npm, where we saw the compromised version published in dozens of packages over a month. After investigating, we found instances of the trojanized jQuery on other platforms, such as GitHub, and even as a CDN-hosted resource on j
MAI-Thinking-1: Building a Hill-Climbing Machine The Microsoft AI Team 1 Abstract Progress in AI is driven not by a single model, but by the ability to continually improve upon the current state of models. Achieving this requires treating model development as a system-level optimization problem, for which the solution is building a hill-climbing machine for rapid improvement. Our process includes
Biome v2.4—Embedded Snippets, HTML Accessibility, and Better Framework Support
Biome v2.4 is the first minor release of the year! After more than ten patches from v2.3, today we bring to you a new version that contains many new features! Once you have upgraded to Biome v2.4.0, migrate your Biome configuration to the new version by running the migrate command: biome migrate --write Highlights Among all the features shipped in this release, here are the ones we think you’re go
React Native 0.76 with the New Architecture by default is now available on npm! In the 0.76 release blog post, we shared a list of significant changes included in this version. In this post, we provide an overview of the New Architecture and how it shapes the future of React Native. The New Architecture adds full support for modern React features, including Suspense, Transitions, automatic batchin
WebKit Features in Safari 18.4
Mar 31, 2025 by Jen Simmons, Saron Yitbarek, Jon Davis, Razvan Caliman, Karl Dubost, Brady Eidson, Elika Etemad, Youenn Fablet, Matthew Finkel, Simon Fraser, Timothy Hatcher, David Johnson, Anne van Kesteren, Daniel Liu, Keith Miller, Rupin Mittal, Tim Nguyen, Pascoe, Abrar Rahman Protyasha, Richard Robinson, Lily Spiniolas, Brandon Stewart, John Wilander and Luming Yin ContentsDeclarative Web Pus
In "Software Engineering - The Soft Parts" Addy Osmani shares lessons from his first 10 years at Google on the "soft skills" that can help engineers become effective and scale their effectiveness. This guidance should help junior, mid-career and even senior developers move forward, deal with changing technology, and navigate building non-trivial systems. Today I'll share some of the software engin
GitHub Pull Requests Version 0.100.0 of the GitHub Pull Requests extension adds Copilot integration: Use the @githubpr chat participant in the Chat view to search for issues, summarize issues/prs, and suggest fixes for issues. @githubpr uses a number of Language Model tools to accomplish this. There's also a new Notifications view that shows GitHub notifications, with an action to prioritize them
Local-first software: You own your data, in spite of the cloud
Cloud apps like Google Docs and Trello are popular because they enable real-time collaboration with colleagues, and they make it easy for us to access our work from all of our devices. However, by centralizing data storage on servers, cloud apps also take away ownership and agency from users. If a service shuts down, the software stops functioning, and data created with that software is lost. In t
research!rsc: Floating-Point Printing and Parsing Can Be Simple And Fast (Floating Point Formatting, Part 3)
Introduction A floating point number f has the form f=m·2e where m is called the mantissa and e is a signed integer exponent. We like to read numbers scaled by powers of ten, not two, so computers need algorithms to convert binary floating-point to and from decimal text. My 2011 post “Floating Point to Decimal Conversion is Easy” argued that these conversions can be simple as long as you don’t car
Balancing Old Tricks with New Feats: AI-Powered Conversion From Enzyme to React Testing Library at Slack
Update (October 2024): In response to numerous requests from external developers, we have open-sourced a version of our Enzyme to React Testing Library (RTL) conversion tool. You can now find it on npm, along with detailed instructions on how to integrate and use it in your projects. In the world of frontend development, one thing remains certain: change is the only constant. New frameworks emerge
Mozilla's Vision of the Web
In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy. Mozilla’s vision for the evolution of the Web March 23, 2022 Mozilla's mission is to ensure that the Internet is a global public resource, open and accessible to all. We belie
--- name: skill-creator description: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations. license: Complete terms in LICENSE.txt --- # Skill Creator This skill provides guidance for creating effective skills. ## About Skills S
Exactly ten years ago today, we published "Why We Created Julia", introducing the Julia project to the world. At this point, we have moved well past the ambitious goals set out in the original blog post. Julia is now used by hundreds of thousands of people. It is taught at hundreds of universities and entire companies are being formed that build their software stacks on Julia. From personalized me
In this article, we’ll show how we cut CKEditor 5’s bundle size by 40% through tree-shaking and bundle size optimization techniques and share tricks you can use to slim down your own JavaScript libraries. We’ll also walk through the tools and processes we used to achieve this, measure improvements, and catch regressions. As any software library author will tell you, building and maintaining is har
How Functional Programming Shaped (and Twisted) Frontend Development A friend called me last week. Someone who’d built web applications back for a long time before moving exclusively to backend and infra work. He’d just opened a modern React codebase for the first time in over a decade. “What the hell is this?” he asked. “What are all these generated class names? Did we just… cancel the cascade? W
Node.js Community Debate Intensifies Over Enabling Corepack ...
A heated debate is happening in the Node.js community over a proposal to enable Corepack by default that was opened in November 2023. This sparked the question of whether npm would be provided through Corepack moving forward, as some contributors hold the opinion that the eventual goal of its integration is to uncouple Node.js releases and npm releases. Corepack allows developers to use Yarn, npm,
Quick Summary This article aims to explain how to write efficient and performant React components along with some common profiling techniques at our disposal that we can use to figure out unoptimized rendering behaviors in our app and improve the performance. Audience The targeted audience for this article is mid-senior level React engineers who are well familiar with the library and have a good u
Large Text Compression Benchmark Matt Mahoney Last update: Mar. 25, 2026. history This competition ranks lossless data compression programs by the compressed size (including the size of the decompression program) of the first 109 bytes of the XML text dump of the English version of Wikipedia on Mar. 3, 2006. About the test data. The goal of this benchmark is not to find the best overall compress
Below is part 1 of an extended scenario describing how the future might go if current trends in AI continue. The scenario is deliberately extremely specific: it’s definite rather than indefinite, and makes concrete guesses instead of settling for banal generalities or abstract descriptions of trends. Open Sky. (Zdzisław Beksiński)The return of reinforcement learningFrom 2019 to 2023, the main driv
This is an all-in-one crosspost of a scenario I originally published in three parts on my blog, No Set Gauge. Links to the originals: A History of the Future, 2025-2027A History of the Future, 2027-2030A History of the Future, 2030-2040 Thanks to Luke Drago, Duncan McClements, Theo Horsley, and Bilal Chughtai for comments. 2025-2027Below is part 1 of an extended scenario describing how the future
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Announcing TypeScript 5.0 - TypeScript
Modern Node.js Patterns for 2025
The Prompt Engineering Playbook for Programmers
Should You Stop Using Prisma?
Claude Mythos Preview \ red.anthropic.com
Welcome to Wildebeest: the Fediverse on Cloudflare
Architecture of an early stage SAAS | Feelback Blog
Announcing TypeScript 5.0 Beta - TypeScript
Low-Level Software Security for Compiler Developers
Announcing TypeScript 5.0 RC - TypeScript
React Server Components: the Good, the Bad, and the Ugly
A pipe operator for JavaScript: introduction and use cases
MAI-Thinking-1: Building a Hill-Climbing Machine
New Architecture is here · React Native
Software Engineering - The Soft Parts
October 2024 (version 1.95)
prompts.chat - AI Prompts Community
Why We Use Julia, 10 Years Later
How We Reduced CKEditor’s Bundle Size by 40% | CKEditor
How Functional Programming Shaped (and Twisted) Frontend Development
Optimizing React App Performance
Large Text Compression Benchmark
A History of the Future, 2025-2027
A History of the Future, 2025-2040 — LessWrong