> For the complete documentation index, see [llms.txt](https://near-sdk-js.gitbook.io/near-sdk-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://near-sdk-js.gitbook.io/near-sdk-js/types/collections/interfaces/getoptions.md).

# GetOptions

[**types/collections**](/near-sdk-js/types/collections.md) • **Docs**

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[near-sdk-js v2.0.0](/near-sdk-js/packages.md) / [types/collections](/near-sdk-js/types/collections.md) / GetOptions

## Interface: GetOptions\<DataType>

Options for retrieving and storing data in the SDK collections.

### Type Parameters

• **DataType**

### Properties

#### defaultValue?

> `optional` **defaultValue**: `DataType`

A default value to return if the original value is not present or null.

**Defined in**

[packages/near-sdk-js/src/types/collections.ts:14](https://github.com/near/near-sdk-js/blob/b58ac04fc6dff2f1120e9098c0cb059493486598/packages/near-sdk-js/src/types/collections.ts#L14)

### Methods

#### deserializer()?

> `optional` **deserializer**(`valueToDeserialize`): `unknown`

A deserializer function to customize the deserialization of values after reading from NEAR storage for this call.

**Parameters**

• **valueToDeserialize**: `Uint8Array`

The Uint8Array retrieved from NEAR storage to deserialize.

**Returns**

`unknown`

**Defined in**

[packages/near-sdk-js/src/types/collections.ts:26](https://github.com/near/near-sdk-js/blob/b58ac04fc6dff2f1120e9098c0cb059493486598/packages/near-sdk-js/src/types/collections.ts#L26)

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#### reconstructor()?

> `optional` **reconstructor**(`value`): `DataType`

A constructor function to call after deserializing a value. Typically this is a constructor of the class you are storing.

**Parameters**

• **value**: `unknown`

The value returned from deserialization - either the provided `deserializer` or default deserialization function.

**Returns**

`DataType`

**Defined in**

[packages/near-sdk-js/src/types/collections.ts:10](https://github.com/near/near-sdk-js/blob/b58ac04fc6dff2f1120e9098c0cb059493486598/packages/near-sdk-js/src/types/collections.ts#L10)

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#### serializer()?

> `optional` **serializer**(`valueToSerialize`): `Uint8Array`

A serializer function to customize the serialization of the collection for this call.

**Parameters**

• **valueToSerialize**: `unknown`

The value that will be serialized - either the `DataType` or a unknown value.

**Returns**

`Uint8Array`

**Defined in**

[packages/near-sdk-js/src/types/collections.ts:20](https://github.com/near/near-sdk-js/blob/b58ac04fc6dff2f1120e9098c0cb059493486598/packages/near-sdk-js/src/types/collections.ts#L20)