App.js

import 'react-native-gesture-handler';
import { StatusBar } from 'expo-status-bar';
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import LoginScreen from "./screens/LoginScreen"
import RegisterScreen from "./screens/RegisterScreen"
import HomeScreen from "./screens/HomeScreen"
import AddChatScreen from "./screens/AddChatScreen"
import ChatScreen from "./screens/ChatScreen"
import { createStackNavigator } from '@react-navigation/stack';

const Stack = createStackNavigator();

const globalScreenOptions = {
  headerStyle: { backgroundColor: "#2C68ED" },
  headerTitleStyle: { color: "white" },
  headerTintColor: "white",
};

// 2:37hr

export default function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator 
      // initialRouteName="Home"
      screenOptions={globalScreenOptions}
      >
        <Stack.Screen name='Login' component={LoginScreen} />
        <Stack.Screen name='Register' component={RegisterScreen} />
        <Stack.Screen name='Home' component={HomeScreen} />
        <Stack.Screen name='AddChat' component={AddChatScreen} />
        <Stack.Screen name='Chat' component={ChatScreen} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});