[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) › IsbnError

Defined in: [packages/common/src/Type.ts:9770](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/common/src/Type.ts#L9770)

Error returned when a string is not a valid [Isbn](https://evolu.dev/docs/api-reference/common/Type/variables/Isbn).

## Extends

- [`TypeError`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError)\<`"Isbn"`\>

## Properties

<a id="type"></a>

### type

```ts
readonly type: "Isbn";
```

Defined in: [packages/common/src/Type.ts:1005](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/common/src/Type.ts#L1005)

#### Inherited from

[`TypeError`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError).[`type`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError#type)

---

<a id="value"></a>

### value

```ts
readonly value: string;
```

Defined in: [packages/common/src/Type.ts:9771](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/common/src/Type.ts#L9771)