Newly added · Frontend engineering

Everything a frontend developer needs to learn, one article at a time.

A running stream of in-depth pieces on HTML, CSS, JavaScript, frameworks, build tools, testing, performance, web security, and AI-assisted development — each one filed under a category you can browse.

Browse all categories235 listings · 31 external · 200 categories

Newly added

The latest pieces across every category, newest first.

INP is a main-thread problem

Listed inCore Web VitalsPerformanceon

Why Interaction to Next Paint punishes long tasks rather than slow servers, how to find the blocking work in a trace, and the four fixes that move the number.

Intermediate9 min
#performance
#metrics

Stop fighting CORS

Listed inCORSWeb Securityon

A CORS error is a server configuration problem wearing a browser error message. What the preflight actually asks, what breaks when credentials are involved, and the fixes that are not a proxy.

Intermediate8 min
#security
#http

Micro Frontends

Listed inMicrofrontend ArchitectureMicrofrontendson

Cam Jackson's reference article: the composition approaches side by side, a worked example of each, and an honest accounting of the costs.

External
martinfowler.com · martinfowler.com
#architecture
#microfrontends

A complete guide to Flexbox

Listed inFlexboxCSSon

The reference everyone actually keeps open: every flex property, on both container and item, with diagrams.

External
CSS-Tricks · css-tricks.com
#css
#layout

A complete guide to CSS Grid

Listed inCSS GridCSSon

Tracks, lines, areas, and the sizing functions — the companion piece to the Flexbox guide.

External
CSS-Tricks · css-tricks.com
#css
#layout

Redux Toolkit

Listed inRedux ToolkitState Managementon

The official, opinionated Redux — slices, immutable updates via Immer, and RTK Query for server state.

External
Redux · redux-toolkit.js.org
#state
#react

How to meet WCAG 2.2

Listed inAccessibilityHTMLon

The filterable quick reference: every success criterion with sufficient techniques and common failures.

External
W3C · w3.org
#a11y
#standards

Module Federation

Listed inModule FederationMicrofrontendson

The normative documentation for hosts, remotes, and shared scopes, now maintained independently of any one bundler.

External
Module Federation · module-federation.io
#microfrontends
#bundlers