Hey 👋
You can spot a CSS tooltip by what breaks. The focus ring disappears, the shadow detaches, the clip-path leaves a gap.
This week we have a CSS property that rewrites the box geometry directly, a one-question test for whether your design system contribution model has become overhead, and a postmortem structure that learns from success as much as failure.
Enjoy 🦄 - Adam at Unicorn Club.
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Three things worth your attention this week:
Build: Test border-shape next time you reach for clip-path.
Shape: Check whether your design sys contributions start with introductions.
Ship: Log each research recommendation with "Goal:" and "Shipped:" to track what reaches usersRun a postmortem after your next project with "What we knew:" and "What changed after launch:".
Top 3 this week 👇
Build: border-shape: the future of the non-rectangular web ↗
Tooltips and custom shapes without the clip-path workarounds.
Why: clip-path hacks that power most CSS tooltips kill focus styles and detach box-shadows from the border, but border-shape rewrites the box geometry so the background, focus ring, and shadow all follow the new shape automatically.
Adopt: Next time you reach for clip-path to build a tooltip or non-standard shape, test border-shape in Chrome Canary 146+ with the experimental web platform features flag enabled.
Shape: Design system contributions work better when everyone knows your name ↗
Most contribution models fail because the team got too big.
Why: In large organisations, DS contribution models scale process to match risk, which turns shared effort into a formal loop nobody trusts enough to complete.
Adopt: If your contributions start with introductions, the team has outgrown informal trust, so scope them to a named working group or replace the model with a lighter intake process.
Ship: Project Postmortems for UX Teams: Learning from Success and Failure ↗
Postmortems work for success as much as failure.
Why: Most UX teams only run postmortems after failures, which means they miss what worked: the decisions that held, the defaults that stuck, the approaches worth repeating.
Adopt: After your next project ships, run a 60-minute session regardless of outcome and log each key decision with two labels: "What we knew:" and "What changed after launch:"
What would make this newsletter more useful to you? ↗
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Dive into more
Build: Understanding CSS corner-shape and the Power of the Superellipse ↗ — FrontendMasters on the maths behind corner-shape, how it differs from border-shape, and when you'd reach for each. This is the companion read to this week's Build pick.
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Build: Sprites on the Web ↗ — Josh W. Comeau on sprite animation: when spritesheets beat CSS animation, with interactive demos and code you can lift for a loading or idle state.
Shape: The Hidden Users of Your Design System and How to Support Them ↗ — Developers testing in isolation, QA engineers, PMs making scope calls. Name them in your contribution guidelines and the onboarding section gets a lot more honest.
Shape: Software interoperability ↗ — Justin Jackson on why open software compounds over time. Worth reading before you commit to locking your team into a proprietary tool.
Ship: The engineeringification of everything ↗ — PostHog on reversibility thinking and measurement culture spreading from engineering into product and design. If your team hasn't named this pattern yet, they're probably already living it.
Useful Extras
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