What features are there when working with micro frontends on Module Federation?

Module Federation is a Webpack 5 technology that allows micro-frontends to dynamically load and share modules with each other at runtime.

Features of working with micro-frontends on Module Federation:

• Dynamic loading: Modules from other applications are loaded on demand, reducing the size of the initial bundle.
• Shared runtime: Allows multiple micro-frontends to share dependencies (e.g., React), avoiding duplication.
• Versioning and compatibility: Careful management of shared library versions is necessary to prevent conflicts.
• Isolation: Each micro-frontend can have its own technology stack but interact through shared interfaces.
• Configuration: Requires setting up ModuleFederationPlugin in Webpack with specified exposed and consumed modules.

Example configuration:

new ModuleFederationPlugin({
  name: 'app1',
  filename: 'remoteEntry.js',
  exposes: {
    './Button': './src/Button',
  },
  remotes: {
    app2: 'app2@http://localhost:3002/remoteEntry.js',
  },
  shared: ['react', 'react-dom'],
})

• Problems: Need to consider style loading, state management, and routing between micro-frontends.

Ultimately, Module Federation enables the creation of scalable and independent micro-frontends with the ability to share code and dependencies.