Guides

Edition 18 of What's !important covers tooltip UX, the geolocation element, MicroLighter, flex-wrap: balance, and recent browser releases.

A free 3-hour freeCodeCamp course teaches you to build apps and autonomous agent workflows using Meta's Muse ecosystem.

Firefox 151 shipped the Document Picture-in-Picture API. Here's how to use it to float HTML widgets in a persistent, resizable window.

AI is automating routine project management tasks. Here's how the PM role is evolving toward strategy, systems thinking, and human judgment.

A capability-led field guide to the architectures that make modern AI agents work, covering 60 patterns across perception, reasoning, planning, and more.

Chrome's aria-hidden console warning signals a real accessibility bug. Here's what causes ghost focus and how to fix the ordering in your modal code.

Engineering orgs chase their AI outliers instead of moving the whole team forward. Here's why that approach fails and what to do instead.

Smallest.ai closed a $13M Series A and launched Hydra, an architecture that splits voice agents into a fast real-time model and a slower, powerful LLM.

Jira is powerful, but it may no longer be right for your team. Here are five signs you've outgrown it — and what one team built instead.

AI tools are capable but lack the right context. Context engineering is the missing piece holding back real-world AI adoption.

The CSS `writing-mode` property controls whether text flows horizontally or vertically. It also defines the block and inline axes used by modern CSS layout.

Learn how to build a browser-based PDF redaction tool using JavaScript, PDF.js, and PDF-lib — no backend required.