Can't Type
Learn TypeScript patterns

Learn

Sandbox

Play

Customize your game

Focus on specific categories or play them all. Hit Go to jump straight in.

Seed: play the same game as a friend
Foundationsdisable all
Type Narrowing
Generics
Utility Types
Union & Intersection
Type Safetydisable all
Type Assertions
Enums & Literals
Strict Mode
Readonly & Immutability
Functions & Structuresdisable all
Function Types
Interface vs Type
Mapped Types
Template Literals
Applied TypeScriptdisable all
React + TypeScript
Module Types
Anti-Patterns & Debuggingdisable all
Error Handling
Common Mistakes
Challenges
Daily

Resets every day

9PE2ZM

Weekly

Resets every Monday

JVQMZU

Activity
Previous games
No games played yet.
More topics
Can't Maintain

Think you can spot clean React component APIs? Same game, same format, different topic.

Props, composition, TypeScript patterns
Can't Resize

Think you can spot responsive design patterns? Same game, same format, different topic.

Media queries, containers, fluid layouts