[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [FieldValue](./firestore_lite.fieldvalue.md) > [(constructor)](./firestore_lite.fieldvalue._constructor_.md) ## FieldValue.(constructor) Constructs a new instance of the `FieldValue` class Signature: ```typescript constructor(_methodName: string); ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | \_methodName | string | The public API endpoint that returns this class. |