React State Sharing

React State Sharing Overview

At its core, react state sharing is about doing one thing well inside your Module Federation project. Once you understand the pattern, you can apply it consistently across features and teams.

Good react state sharing pays off across the whole codebase: fewer surprises, easier testing, and smoother onboarding. The snippet below is a solid starting point.

import React, { Suspense } from 'react';
const ProductList = React.lazy(() => import('catalog/ProductList'));

export default function App() {
  return (
    <Suspense fallback={<p>Loading...</p>}>
      <ProductList />
    </Suspense>
  );
}

In React, a federated remote is loaded with React.lazy and rendered inside a Suspense boundary.

React State Sharing Example

new ModuleFederationPlugin({
  name: 'app',
  filename: 'remoteEntry.js',
  exposes: { './Widget': './src/Widget' },
  remotes: { other: 'other@http://host/remoteEntry.js' },
  shared: { react: { singleton: true } },
});

• Start from a minimal React State Sharing example and grow it only as needed.
• Keep configuration explicit so React State Sharing behaves the same in every environment.
• Name things clearly so teammates understand your React State Sharing at a glance.
• Add tests around React State Sharing early to lock in expected behaviour.

Module Federation Cheatsheet

Key Module Federation settings related to react state sharing.

How React State Sharing Works in Module Federation

React State Sharing builds on Module Federation's ability to load code from another independently built and deployed application at runtime. Each app can be a host, a remote, or both.

In React, a federated remote is loaded with React.lazy and rendered inside a Suspense boundary.

• Remotes expose modules through a remoteEntry.js manifest.
• Hosts declare remotes and import exposed modules dynamically.
• Shared dependencies are deduplicated, ideally as singletons.
• Each micro frontend builds and deploys on its own schedule.

Practical Guidance for React State Sharing

In production, react state sharing needs careful version management and graceful failure handling. Align shared dependency versions and always render a fallback when a remote cannot load.

Common Mistakes

• Copying react state sharing snippets without understanding what each line does.
• Skipping error handling and edge cases when wiring up react state sharing.
• Leaving react state sharing untested, so regressions slip into production.
• Over-engineering react state sharing before you actually need the extra flexibility.

Key Takeaways

• React State Sharing is a core part of working effectively with Module Federation.
• Start small and keep react state sharing focused on a single responsibility.
• Apply consistent patterns so react state sharing scales across your project.
• Test and document react state sharing to keep it maintainable over time.