[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
JsonValue: createTypeNode<JsonValueType>(
  "JsonValue",
  null,
  validateJsonValue,
  (value) => validateJsonValue(value).ok,
  validateJsonValue,
  ok,
  identity,
  getJsonValueRuntimeTypeIssues,
);
```

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

Exact root Type for [JsonValue](https://evolu.dev/docs/api-reference/common/Type/variables/JsonValue) data trees.

### Example

```ts
import {
  assertOk,
  assertType,
  JsonValue,
  type JsonValueInput,
} from "@evolu/common";

const input: JsonValueInput = {
  name: "Ada",
  scores: [10, 20],
};
const result = JsonValue.fromUnknown(input);

assertOk(result, input);
assertType<typeof result.value, JsonValue>();
```