[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) › NullableToOptionalProps

```ts
type NullableToOptionalProps<Props> = {
  readonly [Key in keyof Props]: Props[Key] extends OptionalProperty<TypeNode>
    ? Props[Key]
    : Props[Key] extends UnionType<infer Members>
      ? typeof Null extends Members[number]
        ? OptionalProperty<Props[Key]>
        : Props[Key]
      : Props[Key];
};
```

Defined in: [packages/common/src/Type.ts:11636](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L11636)

Maps object properties whose Union Type includes [Null](https://evolu.dev/docs/api-reference/common/Type/variables/Null) to optional
properties.