useDebounce.kt

@Composable
fun <T> T.useDebounce(
    delayMillis: Long = 300L,
    // 1. couroutine scope
    coroutineScope: CoroutineScope = rememberCoroutineScope(),
    onChange: (T) -> Unit
): T{
    // 2. updating state
    val state by rememberUpdatedState(this)
    
    // 3. launching the side-effect handler
    DisposableEffect(state){
        val job = coroutineScope.launch {
            delay(delayMillis)
            onChange(state)
        }
        onDispose {
            job.cancel()
        }
    }
    return state
}