README.md

Self-Healing Example

This example demos self-healing capabilities with Module Federation. app2 depends on and is expecting a shared dependency to be provided in app1.

---

In app2's webpack config we are expecting styled-components to be a shared dependency with the app1 host application.

// app1 webpack.config.js
new ModuleFederationPlugin({
    // ...
    shared: ["react", "react-dom"] // note lack of "styled-components"
}),

// app2 webpack.config.js
new ModuleFederationPlugin({
    // ...
    shared: ["react", "react-dom", "styled-components"],
}),

Running Demo

Run yarn start. This will build and serve both app1 and app2 on ports 3001 and 3002 respectively.

• HOST: localhost:3001
• REMOTE: localhost:3002

Notice that the button in both apps are the same even though the host app didn't provide styled-components as a dependency. If you open DevTools and checkout the "Network" tab you can see 2 requests were made to app2; the remote <Button /> component and the missing styled-components vendor code.