Date: April 14, 2026 Author: TypeScript Team / Community Spotlight
Happy typing. — The TypeScript Playground Team ts playground 35
type DeepReadonly<T> = { readonly [P in keyof T]: DeepReadonly<T[P]>; }; interface ApiResponse { user: { name: string; settings: { theme: string } }; } Date: April 14, 2026 Author: TypeScript Team /
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Paste your favorite type puzzle. See what breaks — or beautifully, finally, works. Date: April 14
There's a special kind of magic when a tool becomes so intuitive that you stop noticing it's there. The has always been that magic — a blank canvas where ideas turn into compiled JavaScript before you even finish typing.