Add shimmer effect to your view without adding additional libraries.

ShimmerEffectCompose.kt

/**
 * Shimmer Effect Use Custom Code In Compose.
 *  @param[customColorList] You can set Your custom color for effect
 */
fun Modifier.shimmerEffect(customColorList: List<Color>? = null): Modifier = composed {
    var size by remember {
        mutableStateOf(IntSize.Zero)
    }
    val transition = rememberInfiniteTransition(label = "")

    val startOffsetX by transition.animateFloat(
        initialValue = -2 * size.width.toFloat(),
        targetValue = 2 * size.width.toFloat(),
        animationSpec = infiniteRepeatable(tween(durationMillis = 1000)),
        label = ""
    )

    background(
        brush = Brush.linearGradient(
            colors = customColorList ?: listOf(
                Color(0xFFB8B5B5),
                Color(0xFF8F8B8B),
                Color(0xFFB8B5B5)
            ),
            start = Offset(startOffsetX, 0f),
            end = Offset(startOffsetX + size.width.toFloat(), size.height.toFloat())
        )
    )
        .onGloballyPositioned {
            size = it.size
        }
}