Advanced Deployment Strategies in Micro Frontends

2.1. Strategy Overview

Micro Frontends can be deployed using various strategies, including:

• Independent Deployment
• Server-Side Composition
• Client-Side Composition
• Edge-Side Includes (ESI)

2.2. Independent Deployment

Each micro frontend can be deployed independently without affecting others. This strategy relies on versioning and backward compatibility to ensure seamless integration.

2.3. Server-Side Composition

This strategy combines micro frontends at the server level before serving to the client. It often involves using a reverse proxy or API Gateway to aggregate various micro services.

            // Example of server-side composition using Node.js
            const express = require('express');
            const app = express();

            app.get('/', (req, res) => {
                const microFrontends = [/* URLs of micro frontends */];
                res.send(renderMicroFrontends(microFrontends));
            });

            app.listen(3000, () => {
                console.log('Server running on http://localhost:3000');
            });
            

2.4. Client-Side Composition

Micro frontends are composed in the browser using JavaScript. This approach allows for greater flexibility, enabling developers to load and render micro frontends dynamically.

            // Example of client-side composition using dynamic imports
            const loadMicroFrontend = async (url) => {
                const { default: microFrontend } = await import(url);
                microFrontend.render();
            };

            loadMicroFrontend('http://example.com/microfrontend.js');
            

2.5. Edge-Side Includes (ESI)

ESI allows for dynamic assembly of content at the edge, meaning that CDN can serve different micro frontends based on user context or device type.