DevelopmentResources
Your CSS Grid Lanes will likely fail WCAG 2.4.3
“It’s too easy to create inaccessible Grid Lanes.”
DevelopmentResources
Web security docs on MDN
What’s been added and what’s coming next.
DevelopmentResources
Revisiting best practices for HTML video
“We should think more about how we use video on the web.”
DevelopmentOpinions
What’s missing from SVG
Styling external SVGs is the top request.
DevelopmentOpinions
Goodbye, Cursor
Looking for a new AI coding companion.
DevelopmentSamples
Effective software design documents
Catch costly mistakes before you write code.
DevelopmentSamples
Animating the HTML dialog element
A modern approach with native web APIs.
DevelopmentSamples
Experimenting with random() in CSS
Randomness in CSS opens up many new possibilities.
DevelopmentSamples
Setting up webmentions
How Webmentions work on brennan.day.
DevelopmentSamples
AI and greener choices
“Our efforts really can make a dent.”
DevelopmentResources
Warm Burnout
A color scheme with warm colors and good contrast.
DevelopmentOpinions
Why are we not using service workers?
Pros and cons of an underused web technology.
DevelopmentOpinions
Who pays for the tokens?
Whose interest does AI loop engineering serve?
DevelopmentSamples
CSS states and JavaScript events
CSS pseudo-classes that behave like event listeners.
DevelopmentSamples
Fluid typography with progress()
Viewport-based type sizing without the pitfalls.
DevelopmentSamples
The Goldilocks customizable select height
“There’s a sizing ‘pattern’ that’s almost always the-one-you-want.”
DevelopmentResources
Introducing HTML ‘usermedia’
Chrome’s declarative element for camera/microphone access.
DevelopmentSkills
a11y.quest
128 questions to level up your accessibility game.
DevelopmentSamples
On the semantic web
“Semantic HTML is interface infrastructure.“
DevelopmentResources
New to the web platform (June 2026)
Sizing form controls with ‘field-sizing’ becomes Baseline, and more.
DevelopmentResources
Introducing the Safari MCP server
Let your AI agent inspect web pages in Safari.
DevelopmentResources
Unicode character class escapes
“A hidden JavaScript superpower.”
DevelopmentOpinions
“Mobile First” vs Mobile First™
What “Mobile First” was and what it became.
DevelopmentSamples
Fixing full-bleed CSS
A novel approach using some at-rule property magic.
DevelopmentOpinions
Svelte feels like the “Native language” of the web
“When code feels natural, it’s more enjoyable.”
DevelopmentSamples
Progressively enhancing CSS Grid Lanes
Can native masonry layouts be used safely today?
DevelopmentTools
ua-tracer
Inspect what a user agent actually does.
DevelopmentSamples
Cloudflare Turnstile
Stopping form bots without annoying CAPTCHAs.
DevelopmentSamples
Do URLs in prompts change LLM responses?
“It took me weeks of experimentation.”
DevelopmentResources
Getting started with Anchor Positioning
An interactive guide to the Anchor Positioning API.
DevelopmentResources
What’s new in ECMAScript 2026
This year’s additions explained with examples.
DevelopmentResources
Creating PWA icons
Icons that look right on every platform.
DevelopmentOpinions
AI can’t solve it all
What 120+ frontend developers still hate working on.
DevelopmentTools
Rewriting Bun in Rust
“One engineer can do a lot more today than a year ago.”
DevelopmentResources
Connection Allowlist
A network firewall, built into the browser.
DevelopmentSamples
How I set up view transitions
A deep dive into the mechanics behind the transitions.
DevelopmentSamples
Invisible but accessible interactive elements
Use cases and implementation techniques.
DevelopmentTrends
PHP version stats (July 2026)
Version adoption across the Packagist ecosystem.
DevelopmentTools
The making of Claude Code
How Anthropic built a new way to work with code.
DevelopmentSamples
Link + popover navigation
Using HTML ‘popover’ instead of disclosure widgets.
DevelopmentResources
HTTP QUERY method
“QUERY gives you the best of both GET and POST.”
DevelopmentResources
Get ready for CSS ‘border-shape’
Let’s create crazy shapes with modern CSS!
DevelopmentOpinions
What happened to the frontend
“The industry sprinted in a giant circle.”
DevelopmentOpinions
Google Reader was building the wrong future
The feeds weren’t the point, the people were.
DevelopmentTools
Button State Builder
A visual editor for designing multi-state buttons.
DevelopmentTools
Quay
An app to manage your local development services.
DevelopmentSamples
SVG filters on type
From ink bleed to woodtype shadows and metal forms.
DevelopmentOpinions
Own the outer loop
“Agents have leverage, and leverage creates obligations.”
DevelopmentSamples
Different hydration and rendering strategies
Benefits and tradeoffs of modern rendering approaches.
DevelopmentOpinions
Grok is back
“Perhaps I was too quick to dismiss Grok.”
DevelopmentSamples
Setting type like a printed page
Most of a typesetter’s craft is now built into CSS.
DevelopmentOpinions
In defense of polyfills
“A web platform without polyfills would be a stagnant platform.”
DevelopmentSamples
I thought AVIF would make images smaller
Optimization isn’t about using the newest format.
DevelopmentResources
A gentle introduction to Git worktrees
How they simplify parallel development.
DevelopmentSamples
Your “app” could have been a webpage
”A webpage would have been so much better.”
DevelopmentResources
Use cases for the ‘aria-expanded’ attribute
How to determine when ‘aria-expanded’ is appropriate.
DevelopmentTools
Is your site ready for AI agents?
How Lighthouse’s new Agentic Browsing audit works.
DevelopmentResources
Can we use SVG images in emails?
Why scalable images still fail inside modern email.
DevelopmentSamples
Card patterns with anchor positioning
A refined approach to accessible clickable cards.
DevelopmentOpinions
Do we still need build tools?
Which frontend build tools still matter in 2026.
DevelopmentTools
Data tools landscape for developers
A guide to making sense of data tooling for developers.
DevelopmentTools
Gram
An opinionated fork of the Zed code editor.
DevelopmentSamples
Rewriting a sticky detector
How modern CSS simplifies the solution.
DevelopmentResources
How I stopped running out of tokens
Cutting Claude Code costs without losing quality or speed.
DevelopmentResources
Kernel
A component library built on semantic HTML, not div soup.
DevelopmentOpinions
Software factories, light and dark
Why autonomous software still needs engineers.
DevelopmentSamples
CSS-DOS
An entire ‘80s PC implemented in pure CSS.
DevelopmentOpinions
The year of the loop
Loop engineering proved progress isn’t in the AI model.
DevelopmentSamples
New Core Web Vitals research
“Good” for Google may not be good enough for your site.
DevelopmentOpinions
Progressive Web Apps (mostly) rock
Where PWAs shine and where they still fall short.
DevelopmentSamples
I stopped destructuring everything
“I was optimizing for writing the code, not reading it.”
DevelopmentSamples
Which AI actually reads your site?
Two months of LLM traffic, measured.
DevelopmentResources
WebMCP in Chrome
An overview of what it is and why it matters.
DevelopmentConferences
HTML Day 2026
Let’s celebrate and write HTML around the world!
DevelopmentResources
Jelly UI
Dependency-free web components that feel alive.
DevelopmentTools
LLMs.txt Generator
Make your website understandable for AI models.
DevelopmentSamples
CSS infinity use cases
Some elegant solutions and a lot of joy.
DevelopmentSamples
200ms in the life of an HTTP request
Scroll down and the clock advances.
DevelopmentResources
Measuring component performance
How the Container Timing API goes beyond Element Timing.
DevelopmentSamples
Kimi K3 nears Claude on coding task
”K3 belongs in the serious coding-agent comparison set now.”
DevelopmentSamples
How Kimi K3 topped design leaderboards
“Kimi K3’s design secret may be in its thinking traces.”
DevelopmentSkills
AraOwl
Test your web platform skills with MDN-powered quizzes.
DevelopmentTrends
The State of CSS 2026
“CSS seems to remain a stronghold of manual coding.”
DevelopmentOpinions
The new yet familiar CodePen 2.0
How the popular code editor has matured.
DevelopmentResources
MCP goes stateless
The protocol got simpler, but the hard part stayed.
DevelopmentResources
TanStack has a new look
“You’re in good hands, we care about the details.”
DevelopmentOpinions
Nothing works and everyone is euphoric
Why does software keep getting worse?
DevelopmentSamples
Stop downloading twice
What to expect from the Cross-Origin Storage API?
DevelopmentSamples
Styling the navigation
A proposal for route-aware styling in plain CSS.
DevelopmentTools
Chrome may get faster updates
Google aims to install fixes without a Chrome restart.
DevelopmentSamples
Top 1 Million Analysis 2026: Web Security
“There is still a lot of value left on the table.”
DevelopmentSamples
Top 1 Million Analysis 2026: Cryptography
“The TLS and certificate ecosystem feels like it’s finally in good shape.”
DevelopmentSamples
HTML in canvas
Rendering interactive DOM elements inside a canvas.
DevelopmentResources
New to the web platform (July 2026)
Stable browser releases, Intl.Locale info API, and more.
DevelopmentResources
The CSS lh unit
How the line height unit works and where it shines.
DevelopmentTools
Global TCP Traceroute
Run TCP traceroutes from around the world.
DevelopmentTools
Undo
A safety net for the shell, on any Linux.
DevelopmentTools
Buzz
A workspace where humans and agents build together.
DevelopmentOpinions
GitHub has alternatives, but no replacement
Could a boring company fill the gap?
DevelopmentSamples
Baking physics in CSS
Abusing linear() to create natural motion from numbers.