Get a union of property names from a type.
Section: Type Operators
Use `keyof`
typescript
typescript
type User = { id: number; name: string };
type UserKeys = keyof User; // "id" | "name"Explanation
`keyof` is foundational for many advanced type helpers.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Type Operators
Use indexed access types
Get a nested property type from another type.
Use template literal types
Compose string literal types from smaller pieces.
Constrain a key parameter with `keyof`
Accept only valid property names for a given object type.
Generic identity function
Use a type parameter for reusable function typing.