Can't UX
Learn UX design

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Spot the
better design.

Train your design eye with side-by-side UX comparisons. Learn typography, spacing, color, hierarchy, and more through 28 patterns across 7 categories.

free · no signup · visual comparisons
A

vs

B

Two ways to level up

A pattern quiz and a reference library for UX design.

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Pick the better UX pattern in 10 side-by-side visual challenges. Daily and weekly seeds included.

Learn

28 patterns across 7 categories. Each shows the weak approach, the strong one, and why it matters.

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Can't Maintain

React component API design. Props, composition, and patterns.
Development

Can't Resize

Responsive design patterns. Media queries, flexbox, grid, and viewport units.
Development
TS

Can't Type

TypeScript patterns. Generics, narrowing, utility types, and common mistakes.
Development

Can't Orchestrate

Container orchestration patterns. Docker, Kubernetes, CI/CD, and Helm.
Development

Can't SEO

SEO best practices for Next.js. Meta tags, Open Graph, structured data, and more.
Development

Can't Explode

Chemistry challenges. Molecular stability, acid strength, bond energy, and electronegativity.
Science

Can't Branch

Git best practices. Commits, branches, merges, PRs, hooks, and repository management.
Development

Can't Test

Testing patterns. Unit tests, integration tests, mocking, test strategy, and CI.
Development
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Can't Query

API endpoint patterns. REST, GraphQL, WebSockets, auth, and error handling.
Development

Can't Game

Game development patterns. Game loops, input, physics, rendering, AI, shaders, and netcode.
Development

Can't Ticket

Agile ticket craft. User stories, acceptance criteria, story points, and splitting work the team can ship.
Process

Open source

Built with Next.js, Material UI, and TypeScript. Contributions welcome.

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