---
title: "SmallFloatingActionButton"
description: "The FAB represents the most important action on a screen. It puts key actions within reach."
type: "component"
social_image: "/static/images/material3/small-fab.png"
---

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



The FAB represents the most important action on a screen. It puts key actions within reach.

<img loading='lazy' class='hero-img' alt='Small FAB image' src='/static/images/material3/small-fab.png'>

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

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


```kotlin
@Composable
fun SmallFloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    shape: Shape = FloatingActionButtonDefaults.smallShape,
    containerColor: Color = FloatingActionButtonDefaults.containerColor,
    contentColor: Color = contentColorFor(containerColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation(),
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit,
)
```


#### Parameters

| | |
| --- | --- |
| onClick | called when this FAB is clicked |
| modifier | the `Modifier` to be applied to this FAB |
| shape | defines the shape of this FAB's container and shadow (when using `elevation`) |
| containerColor | the color used for the background of this FAB. Use `Color.Transparent` to have no color. |
| contentColor | the preferred color for content inside this FAB. Defaults to either the matching content color for `containerColor`, or to the current `LocalContentColor` if `containerColor` is not a color from the theme. |
| elevation | `FloatingActionButtonElevation` used to resolve the elevation for this FAB in different states. This controls the size of the shadow below the FAB. Additionally, when the container color is `ColorScheme.surface`, this controls the amount of primary color applied as an overlay. See also: `Surface`. |
| interactionSource | an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this FAB. You can use this to change the FAB's appearance or preview the FAB in different states. Note that if `null` is provided, interactions will still happen internally. |
| content | the content of this FAB, typically an `Icon` |






## Code Examples
### AnimatedFloatingActionButtonSample
```kotlin
@OptIn(ExperimentalMaterial3ExpressiveApi::class, ExperimentalMaterial3Api::class)
@Preview
@Composable
fun AnimatedFloatingActionButtonSample() {
    val listState = rememberLazyListState()
    // The FAB is initially shown. Upon scrolling past the first item we hide the FAB by using a
    // remembered derived state to minimize unnecessary compositions.
    val fabVisible by remember { derivedStateOf { listState.firstVisibleItemIndex == 0 } }
    Scaffold(
        floatingActionButton = {
            // A FAB should have a tooltip associated with it.
            TooltipBox(
                positionProvider =
                    TooltipDefaults.rememberTooltipPositionProvider(TooltipAnchorPosition.Above),
                tooltip = { PlainTooltip { Text("Localized description") } },
                state = rememberTooltipState(),
            ) {
                MediumFloatingActionButton(
                    modifier =
                        Modifier.animateFloatingActionButton(
                            visible = fabVisible,
                            alignment = Alignment.BottomEnd,
                        ),
                    onClick = { /* do something */ },
                ) {
                    Icon(
                        Icons.Filled.Add,
                        contentDescription = "Localized description",
                        modifier = Modifier.size(FloatingActionButtonDefaults.MediumIconSize),
                    )
                }
            }
        },
        floatingActionButtonPosition = FabPosition.End,
    ) {
        LazyColumn(state = listState, modifier = Modifier.fillMaxSize()) {
            for (index in 0 until 100) {
                item { Text(text = "List item - $index", modifier = Modifier.padding(24.dp)) }
            }
        }
    }
}
```
### SmallFloatingActionButtonSample
```kotlin
@OptIn(ExperimentalMaterial3Api::class)
@Preview
@Composable
fun SmallFloatingActionButtonSample() {
    // A FAB should have a tooltip associated with it.
    TooltipBox(
        positionProvider =
            TooltipDefaults.rememberTooltipPositionProvider(TooltipAnchorPosition.Above),
        tooltip = { PlainTooltip { Text("Localized description") } },
        state = rememberTooltipState(),
    ) {
        SmallFloatingActionButton(onClick = { /* do something */ }) {
            Icon(Icons.Filled.Add, contentDescription = "Localized description")
        }
    }
}
```