overreacted.io

Latest posts

• A Social Filesystem

  Jan 18, 2026

  Formats over apps.

• Introducing RSC Explorer

  Dec 19, 2025

  My new hobby project.

• Hire Me in Japan

  Nov 11, 2025

  I'm looking for a new job.

• How to Fix Any Bug

  Oct 21, 2025

  The joys of vibecoding.

• Where It's at://

  Oct 02, 2025

  From handles to hosting.

• Open Social

  Sep 26, 2025

  The protocol is the API.

• A Lean Syntax Primer

  Sep 02, 2025

  Programming with proofs.

• Beyond Booleans

  Aug 16, 2025

  What is the type of 2 + 2 = 4?

• The Math Is Haunted

  Jul 30, 2025

  A taste of Lean.

• Suppressions of Suppressions

  Jun 11, 2025

  I heard you like linting.

• I'm Doing a Little Consulting

  Jun 11, 2025

  Personal update post.

• How Imports Work in RSC

  Jun 05, 2025

  A layered module system.

• RSC for LISP Developers

  Jun 01, 2025

  Quoting for modules.

• Progressive JSON

  May 31, 2025

  Why streaming isn't enough.

• Why Does RSC Integrate with a Bundler?

  May 30, 2025

  One does not simply serialize a module.

• One Roundtrip Per Navigation

  May 29, 2025

  What do HTML, GraphQL, and RSC have in common?

• Static as a Server

  May 08, 2025

  You wouldn't download a site.

• RSC for Astro Developers

  May 06, 2025

  Islands, but make it fractal.

• Functional HTML

  May 02, 2025

  Tags on both sides.

• What Does "use client" Do?

  Apr 25, 2025

  Two worlds, two doors.

• Impossible Components

  Apr 22, 2025

  Composing across the stack.

• JSX Over The Wire

  Apr 16, 2025

  Turning your API inside-out.

• React for Two Computers

  Apr 09, 2025

  Two things, one origin.

• The Two Reacts

  Jan 04, 2024

  UI = f(data)(state)

• A Chain Reaction

  Dec 11, 2023

  The limits of my language mean the limits of my world.

• npm audit: Broken by Design

  Jul 07, 2021

  Found 99 vulnerabilities (84 moderately irrelevant, 15 highly irrelevant)

• Before You memo()

  Feb 23, 2021

  Rendering optimizations that come naturally.

• The WET Codebase

  Jul 13, 2020

  Come waste your time with me.

• Goodbye, Clean Code

  Jan 11, 2020

  Let clean code guide you. Then let it go.

• My Decade in Review

  Jan 01, 2020

  A personal reflection.

• What Are the React Team Principles?

  Dec 25, 2019

  UI Before API.

• On let vs const

  Dec 22, 2019

  So which one should I use?

• What Is JavaScript Made Of?

  Dec 20, 2019

  Getting a closure on JavaScript.

• How Does the Development Mode Work?

  Aug 04, 2019

  Dead code elimination by convention.

• Algebraic Effects for the Rest of Us

  Jul 21, 2019

  They’re not burritos.

• Preparing for a Tech Talk, Part 3: Content

  Jul 10, 2019

  Turning an idea into a talk.

• Name It, and They Will Come

  Mar 25, 2019

  A change starts with a story.

• Writing Resilient Components

  Mar 16, 2019

  Four principles to set you on the right path.

• A Complete Guide to useEffect

  Mar 09, 2019

  Effects are a part of your data flow.

• How Are Function Components Different from Classes?

  Mar 03, 2019

  They’re a whole different Pokémon.

• Coping with Feedback

  Mar 02, 2019

  Sometimes I can’t fall asleep.

• Fix Like No One’s Watching

  Feb 15, 2019

  The other kind of technical debt.

• Making setInterval Declarative with React Hooks

  Feb 04, 2019

  How I learned to stop worrying and love refs.

• React as a UI Runtime

  Feb 02, 2019

  An in-depth description of the React programming model.

• Why Isn’t X a Hook?

  Jan 26, 2019

  Just because we can, doesn’t mean we should.

• The “Bug-O” Notation

  Jan 25, 2019

  What is the 🐞(n) of your API?

• Preparing for a Tech Talk, Part 2: What, Why, and How

  Jan 07, 2019

  We need to go deeper.

• The Elements of UI Engineering

  Dec 30, 2018

  What makes UI engineering difficult?

• Things I Don’t Know as of 2018

  Dec 28, 2018

  We can admit our knowledge gaps without devaluing our expertise.

• Preparing for a Tech Talk, Part 1: Motivation

  Dec 26, 2018

  Here’s my recipe for a good talk idea.