launched effect example

launchedeffect.kt

@Composable
fun TimeDisplay(viewModel: TimeDisplayViewModel) {
  val properties: Map<String, Long> by viewModel.properties.collectAsState()
  var timeRemaining by rememeber { mutableStateOf(0) }
  
  Text(timeRemaining.toString)
  
  val timeProperty = properties["time"]
  LaunchedEffect(timeProperty) {
    val currentTime = System.currentTimeMillis()
    while (timeProperty > currentTime) {
      timeRemaining = timeProperty - currentTime
      delay(1000L)
    }
    timeRemaining = 0L
  }
}