Scope for the content of a FlexBox. Provides the flex modifier for configuring individual flex item properties.

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.FlexBox
import androidx.compose.foundation.layout.FlexConfig
import androidx.compose.foundation.layout.size
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

// FlexConfig can be defined as top-level constants for reuse
val NoShrink = FlexConfig { shrink(0f) }

FlexBox {
    // Basic item without flex configuration
    Box(Modifier.size(50.dp).background(Color.Red))

    // Item with inline flex configuration
    Box(Modifier.size(50.dp).background(Color.Green).flex { grow(1f) })

    // Item with reusable FlexConfig
    Box(Modifier.size(50.dp).background(Color.Blue).flex(NoShrink))
}
See also
FlexBox
FlexConfig

Summary

Public functions
Modifier
Modifier.flex(flexConfig: FlexConfig)

Configures the flex properties of this element within the FlexBox using the provided FlexConfig.
Cmn
open Modifier
Modifier.flex(flexConfig: FlexConfigScope.() -> Unit)

Configures the flex properties of this element within the FlexBox using a configuration lambda.
Cmn

Public functions

Modifier.flex

Cmn 
fun Modifier.flex(flexConfig: FlexConfig): Modifier

Configures the flex properties of this element within the FlexBox using the provided FlexConfig.

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.FlexAlignSelf
import androidx.compose.foundation.layout.FlexBox
import androidx.compose.foundation.layout.FlexConfig
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.size
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

// Define reusable FlexConfig - can be a top-level constant
val GrowAndCenter = FlexConfig {
    grow(1f)
    alignSelf(FlexAlignSelf.Center)
}

FlexBox(modifier = Modifier.fillMaxWidth().height(100.dp)) {
    Box(Modifier.size(50.dp).background(Color.Red))
    Box(Modifier.background(Color.Green).flex(GrowAndCenter))
    Box(Modifier.size(50.dp).background(Color.Blue))
}
Parameters
flexConfig: FlexConfig

The flex configuration to apply.
See also
FlexConfig

Modifier.flex

Cmn 
open fun Modifier.flex(flexConfig: FlexConfigScope.() -> Unit): Modifier

Configures the flex properties of this element within the FlexBox using a configuration lambda.

This modifier allows you to specify how an individual item should share available space (grow, shrink, basis) and how it aligns itself along the cross axis (alignSelf).

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.FlexAlignSelf
import androidx.compose.foundation.layout.FlexBox
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

FlexBox(modifier = Modifier.fillMaxWidth()) {
    Box(
        Modifier.height(50.dp).background(Color.Blue).flex {
            grow(1f)
            shrink(0f)
            alignSelf(FlexAlignSelf.Center)
        }
    )
}
Parameters
flexConfig: FlexConfigScope.() -> Unit

A lambda that configures the flex properties within a FlexConfigScope.
See also
FlexConfigScope