# FieldOptions

`interface` in `custom-id` · v0.2.1

<https://docs.seedcord.org/packages/custom-id/0.2.1/interfaces/field-options>

Per-field options every [`CustomId`](/packages/custom-id/0.2.1/classes/custom-id) chain method takes.

```ts
interface FieldOptions<Nullable extends boolean = boolean>
```

## Properties

### nullable

```ts
nullable: Nullable;
```

Whether the field also carries null. A nullable field costs one extra slot on the wire.