---
title: "SideEffect"
description: "Schedule [effect] to run when the current composition completes successfully and applies changes.
[SideEffect] can be used to apply side effects to objects managed by the composition that are not
backed by [snapshots][androidx.compose.runtime.snapshots.Snapshot] so as not to leave those
objects in an inconsistent state if the current composition operation fails.

[effect] will always be run on the composition's apply dispatcher and appliers are never run
concurrent with themselves, one another, applying changes to the composition tree, or running
[RememberObserver] event callbacks. [SideEffect]s are always run after [RememberObserver] event
callbacks.

A [SideEffect] runs after **every** recomposition. To launch an ongoing task spanning potentially
many recompositions, see [LaunchedEffect]. To manage an event subscription or other object
lifecycle, see [DisposableEffect]."
type: "composable"
---

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


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>


```kotlin
@Composable
@ExplicitGroupsComposable
public fun SideEffect(effect: () -> Unit)
```


Schedule `effect` to run when the current composition completes successfully and applies changes.
`SideEffect` can be used to apply side effects to objects managed by the composition that are not
backed by `snapshots` so as not to leave those
objects in an inconsistent state if the current composition operation fails.

`effect` will always be run on the composition's apply dispatcher and appliers are never run
concurrent with themselves, one another, applying changes to the composition tree, or running
`RememberObserver` event callbacks. `SideEffect`s are always run after `RememberObserver` event
callbacks.

A `SideEffect` runs after **every** recomposition. To launch an ongoing task spanning potentially
many recompositions, see `LaunchedEffect`. To manage an event subscription or other object
lifecycle, see `DisposableEffect`.