[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Brand](https://evolu.dev/docs/api-reference/common/Brand) › IsBranded

```ts
type IsBranded<T> = T extends Brand<string> ? true : false;
```

Defined in: [packages/common/src/Brand.ts:104](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Brand.ts#L104)

Determines whether a type `T` is a branded type.

Works with any base type intersected with a `Brand`.

### Example

- `IsBranded<string>` -> false
- `IsBranded<string & Brand<"X">>` -> true