
As React Native apps grow in complexity, maintaining clean and scalable architecture becomes essential. One popular architecture pattern borrowed from native development is MVVM (Model-View-ViewModel). But is it worth using in a JavaScript or TypeScript environment?
Letβs break it down β what MVVM means in React Native, how to structure it, and when the MVVM architecture makes sense to adopt it.
π What Is MVVM?
MVVM stands for:
- Model β The data and business logic layer (e.g. API calls, data transformation)
- View β The UI (React Native components)
- ViewModel β Acts as a bridge between View and Model, managing state and exposing it to the View
In React Native, the ViewModel is often implemented using Hooks or classes, depending on your preference.
π¦ Example Folder Structure (React Native + TypeScript)
src/
βββ models/ # Data interfaces, DTOs
βββ viewmodels/ # Custom hooks or classes that handle state
βββ views/ # Screens & components
βββ services/ # API, storage, utilities
βββ navigation/ # Navigation config
βββ App.tsx
π§ Example: Login Screen with MVVM
π§© 1. Model (LoginPayload.ts)
export interface LoginPayload {
email: string;
password: string;
}
π§ 2. ViewModel (useLoginViewModel.ts)
import { useState } from 'react';
import { LoginPayload } from '../models/LoginPayload';
export function useLoginViewModel() {
const [form, setForm] = useState({ email: '', password: '' });
const [loading, setLoading] = useState(false);
const handleChange = (field: keyof LoginPayload, value: string) => {
setForm(prev => ({ ...prev, [field]: value }));
};
const login = async () => {
setLoading(true);
try {
// fake API call
await new Promise(res => setTimeout(res, 1000));
alert('Login Success');
} catch (err) {
alert('Login Failed');
} finally {
setLoading(false);
}
};
return { form, loading, handleChange, login };
}
π± 3. View (LoginScreen.tsx)
import React from 'react';
import { View, TextInput, Button, ActivityIndicator } from 'react-native';
import { useLoginViewModel } from '../viewmodels/useLoginViewModel';
export const LoginScreen = () => {
const { form, loading, handleChange, login } = useLoginViewModel();
return (
handleChange('email', text)}
/>
handleChange('password', text)}
/>
{loading ? (
) : (
β Pros of MVVM in React Native
- β Separation of concerns: UI logic is isolated
- β Easier to test and mock business logic
- β Reusable view models across screens
- β Cleaner code when managing complex state
β Cons of MVVM in React Native
- β Overhead for small/simple apps
- β Slight learning curve for new devs
- β Can lead to unnecessary abstraction if overused
π§ When Should You Use MVVM?
Project Type | MVVM Worth It? |
---|---|
Simple apps | β Not needed |
Medium-sized apps | β Helpful |
Large-scale apps | β Absolutely |
Team projects | β Consistency |
If you have business logic, stateful flows, or reusable logic across screens, MVVM architecture in React Native can bring real clarity to your project.
π Conclusion
MVVM isnβt βrequiredβ in React Native, but itβs incredibly helpful once your app grows beyond a few screens. By introducing ViewModels via custom hooks or classes, you get better testability, clearer structure, and a cleaner separation of concerns.
If you’re already using context, Redux, or Zustand β MVVM can sit on top as an organizing principle rather than a replacement.
Try it in one screen and see how it improves your code clarity.