requiredWidth

fun Modifier.requiredWidth(intrinsicSize: IntrinsicSize): Modifier

Declare the width of the content to be exactly the same as the min or max intrinsic width of the content. The incoming measurement Constraints will not override this value. If the content intrinsic width does not satisfy the incoming Constraints, the parent layout will be reported a size coerced in the Constraints, and the position of the content will be automatically offset to be centered on the space assigned to the child by the parent layout under the assumption that Constraints were respected.

See height for options of sizing to intrinsic height. See width and widthIn for options to set the preferred width. See requiredWidth and requiredWidthIn for other options to set the required width.

fun Modifier.requiredWidth(width: Dp): Modifier

Declare the width of the content to be exactly widthdp. The incoming measurement Constraints will not override this value. If the content chooses a size that does not satisfy the incoming Constraints, the parent layout will be reported a size coerced in the Constraints, and the position of the content will be automatically offset to be centered on the space assigned to the child by the parent layout under the assumption that Constraints were respected.

See requiredWidthIn and requiredSizeIn to set a size range. See width to set a preferred width, which is only respected when the incoming constraints allow it.

Example usage:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.aspectRatio
import androidx.compose.foundation.layout.requiredWidth
import androidx.compose.foundation.layout.width
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

// The result is a 50.dp x 50.dp magenta box centered in a 100.dp x 100.dp space.
// Note that although a previous modifier asked it to be 100.dp width, this
// will not be respected. They would be respected if width was used instead of requiredWidth.
Box(
    Modifier.requiredWidth(100.dp)
        .requiredWidth(50.dp)
        .aspectRatio(1f)
        .background(Color.Magenta)
)