Common
```kotlin
object BottomAppBarDefaults
```
Contains default values used for the bottom app bar implementations.
## Properties
Common
```kotlin
val containerColor: Color
```
Default color used for [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar) container
Common
```kotlin
val ContainerElevation: Dp
```
Default elevation used for [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar)
Common
```kotlin
val ContentPadding =
PaddingValues(
start = BottomAppBarHorizontalPadding,
top = BottomAppBarVerticalPadding,
end = BottomAppBarHorizontalPadding,
)
```
Default padding used for [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar) when content are default size (24dp) icons in
[IconButton](/jetpack-compose/androidx.compose.material3/material3/components/IconButton) that meet the minimum touch target (48.dp).
Common
```kotlin
val windowInsets: WindowInsets
```
Default insets that will be used and consumed by [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar).
Common
```kotlin
val bottomAppBarFabColor: Color
```
The color of a [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar)'s [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton)
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val FlexibleContentPadding =
PaddingValues(
start = DockedToolbarTokens.ContainerLeadingSpace,
end = DockedToolbarTokens.ContainerTrailingSpace,
)
```
Default padding used for [FlexibleBottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/FlexibleBottomAppBar).
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val FlexibleBottomAppBarHeight = DockedToolbarTokens.ContainerHeight
```
Default height of a flexible [FlexibleBottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/FlexibleBottomAppBar). The height here represents the height of
the bottom app bar in its expanded state.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val FlexibleHorizontalArrangement: Arrangement.Horizontal
```
A default [Arrangement](/jetpack-compose/androidx.compose.foundation/foundation-layout/objects/Arrangement) that will be used to space a [FlexibleBottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/FlexibleBottomAppBar)'s content.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val FlexibleFixedHorizontalArrangement: Arrangement.Horizontal
```
An [Arrangement](/jetpack-compose/androidx.compose.foundation/foundation-layout/objects/Arrangement) that will be used to space [FlexibleBottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/FlexibleBottomAppBar)'s with a fixed spacing.
## Functions
```kotlin
@ExperimentalMaterial3Api
@Composable
fun exitAlwaysScrollBehavior(
state: BottomAppBarState = rememberBottomAppBarState(),
canScroll: () -> Boolean = { true },
snapAnimationSpec: AnimationSpec? = MotionSchemeKeyTokens.FastSpatial.value(),
flingAnimationSpec: DecayAnimationSpec? = rememberSplineBasedDecay(),
): BottomAppBarScrollBehavior
```
Returns a [BottomAppBarScrollBehavior](/jetpack-compose/androidx.compose.material3/material3/interfaces/BottomAppBarScrollBehavior). A bottom app bar that is set up with this
[BottomAppBarScrollBehavior](/jetpack-compose/androidx.compose.material3/material3/interfaces/BottomAppBarScrollBehavior) will immediately collapse when the content is pulled up, and
will immediately appear when the content is pulled down.
The returned [BottomAppBarScrollBehavior](/jetpack-compose/androidx.compose.material3/material3/interfaces/BottomAppBarScrollBehavior) is remembered across compositions.
#### Parameters
| | |
| --- | --- |
| state | the state object to be used to control or observe the bottom app bar's scroll state. See [rememberBottomAppBarState](/jetpack-compose/androidx.compose.material3/material3/composable-functions/rememberBottomAppBarState) for a state that is remembered across compositions. |
| canScroll | a callback used to determine whether scroll events are to be handled by this `ExitAlwaysScrollBehavior` |
| snapAnimationSpec | an optional [AnimationSpec](/jetpack-compose/androidx.compose.animation/animation-core/interfaces/AnimationSpec) that defines how the bottom app bar snaps to either fully collapsed or fully extended state when a fling or a drag scrolled it into an intermediate position |
| flingAnimationSpec | an optional [DecayAnimationSpec](/jetpack-compose/androidx.compose.animation/animation-core/interfaces/DecayAnimationSpec) that defined how to fling the bottom app bar when the user flings the app bar itself, or the content below it |