voluptasmollitia/docs-exp/firestore_lite.settings.ignoreundefinedproperties.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/firestore](./firestore.md) &gt; [lite](./firestore_lite.md) &gt; [Settings](./firestore_lite.settings.md) &gt; [ignoreUndefinedProperties](./firestore_lite.settings.ignoreundefinedproperties.md)

## Settings.ignoreUndefinedProperties property

Whether to skip nested properties that are set to `undefined` during object serialization. If set to `true`<!-- -->, these properties are skipped and not written to Firestore. If set to `false` or omitted, the SDK throws an exception when it encounters properties of type `undefined`<!-- -->.

<b>Signature:</b>

```typescript
ignoreUndefinedProperties?: boolean;
```