---
title: "observeSnapshots"
description: "This is a tooling API and is not intended to be used in a production application as it will
introduce global overhead to creating, applying and disposing all snapshots and, potentially, to
reading and writing all state objects.

Observe when snapshots are created, applied, and/or disposed. The observer can also install read
and write observers on the snapshot being created.

This method is thread-safe and calling [ObserverHandle.dispose] on the [ObserverHandle] returned
is also thread-safe."
type: "function"
---

<div class='type'>Function</div>


<a id='references'></a>
<div class='sourceset sourceset-common'>Common</div>


```kotlin
@ExperimentalComposeRuntimeApi
public fun Snapshot.Companion.observeSnapshots(snapshotObserver: SnapshotObserver): ObserverHandle
```


This is a tooling API and is not intended to be used in a production application as it will
introduce global overhead to creating, applying and disposing all snapshots and, potentially, to
reading and writing all state objects.

Observe when snapshots are created, applied, and/or disposed. The observer can also install read
and write observers on the snapshot being created.

This method is thread-safe and calling `ObserverHandle.dispose` on the `ObserverHandle` returned
is also thread-safe.

#### Parameters

| | |
| --- | --- |
| snapshotObserver | the snapshot observer to install. |


#### Returns

| | |
| --- | --- |
|  | `ObserverHandle` an instance to unregister the `snapshotObserver`. |