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

```ts
function literal<T>(expected: T): LiteralType<T>;
```

Defined in: [packages/common/src/Type.ts:2411](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Type.ts#L2411)

Literal [Type](https://evolu.dev/docs/api-reference/common/Type/interfaces/Type).

https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#literal-types

### Example

```ts
const LiteralHello = literal("Hello");
const result = LiteralHello.from("Hello"); // ok("Hello")
const errorResult = LiteralHello.from("World"); // err
```

TODO: Add JsonValue