Beyond Any and Unknown: Mastering TypeScript's Advanced Type Safety

Automated excerpt

We can formalize them into type guards—functions that return a type predicate (arg is Type). Use a template literal type. ? { userId: number; name: string } ? { userId: number; key: Key; value: string } // TypeScript infers the return type based on the path! // ^? Type: { userId: number; name: string } // ^?

Selected automatically from source text; not independently written or fact-checked. Read the original for full context.