[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) › JsonValue

```ts
type JsonValue =
  string | FiniteNumber | boolean | null | JsonArray | JsonObject;
```

Defined in: [packages/common/src/Type.ts:16026](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L16026)

An exact in-memory JSON data value.

Numbers are finite. Arrays and objects use Evolu Type's strict plain-data
representations, and the complete value graph is acyclic.