Screen.kt

package com.ciru.practice

import androidx.compose.runtime.Composable
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable

/**
 * Pass in an instance of [loginViewModel] and [navController]
 * Reason why we are not instatiating/creating our viewmodel instance is here
 * is that whenever this composable will be recomposed, a new viewmodel instance will always be created
 * and that is too expensive, hence why we just pass a reference of the [loginViewModel]
 * and leave the activity to do the initialization of both the viewmodel and nav controller
 */
@Composable
fun Screen(loginViewModel: LoginViewModel,navController: NavHostController,){
      NavHost(
          navController = navController,
          startDestination =  MainContent.Boo.route
      ){
          composable(route = MainContent.Boo.route){
              Boo(loginViewModel = loginViewModel,navController = navController)
          }
          composable(route = MainContent.Bae.route){
              Bae(loginViewModel = loginViewModel,navController = navController)
          }
      }
}