Understanding and implementing micro frontends in large projects

When it comes time to scale web applications, code issues often arise. Developers have to look for new architectural solutions to overcome complexity. One such solution is the implementation of microfrontends.

What is a microfrontend?

Microfrontends have become a significant part of development, especially for large projects. This is an approach where the frontend application is divided into several smaller, functionally independent parts. Each part can be created and maintained by separate teams, allowing for improved scalability and independence in development.

Advantages of using microfrontends

1. Scalability and independence: Small teams can focus on their parts of the system without overlapping with other departments.
2. Technology flexibility: Each team can choose the technology stack that will be most effective for the specific task.
3. Ease of changes: Changes in one microfrontend do not affect other parts of the application.

Example of application

Imagine a large online store dividing its application into several microfrontends: shopping cart, product catalog, user profile. Each of these parts can evolve independently without harming the rest of the system.

How to implement microfrontends in large projects

Before implementation, it is worth conducting a detailed analysis of the existing system. Identify which parts of the application are the best candidates for distribution.

Tools for working with microfrontends:

• Webpack Module Federation: Allows for the sharing and dynamic loading of modules at runtime.
• Single-SPA: A framework for integrating and managing multiple frontend applications.
• Mosaic9: Created for managing microservices and microfrontends.

Problems that may arise

1. Cross-team communication: It is necessary to ensure stable communication between teams for effective work.
2. Integration and testing: Synchronizing the work of individual microfrontends can become a challenging task.
3. Performance optimization: Too many independent parts can lead to increased loading times.

Example of integration code:

import { registerApplication, start } from 'single-spa';

// Application registration
registerApplication({
  name: '@company/navbar',
  app: () => import(navbar/NavbarApp),
  activeWhen: [/]
});

// Start
start();

Implementing microfrontends can significantly change the approach to developing large projects, providing independence, scalability, and some flexibility in tool selection.