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How to handle multiple instances of microfrontends in Angular 17?

How to handle multiple instances of microfrontends in Angular 17?

To handle multiple instances of microfrontends in Angular 17, you can use a combination of tools and strategies to manage their integration smoothly. Microfrontends allow for a scalable architecture where different frontend teams can work independently on parts of a large application. Here’s how you can set this up in Angular:

1. Module Federation

Angular 17 continues to support Module Federation, a Webpack feature that enables JavaScript applications to dynamically load code from other applications. This is particularly useful for microfrontends.

Setup:

  • Host Configuration: In the Webpack configuration of the host application, you need to set up the ModuleFederationPlugin to define which microfrontends (remote entries) it can consume.
// webpack.config.js
const ModuleFederationPlugin = require("webpack/lib/container/ModuleFederationPlugin");

module.exports = {
  plugins: [
    new ModuleFederationPlugin({
      name: 'host',
      remotes: {
        microfrontend1: 'microfrontend1@http://domain.com/microfrontend1/remoteEntry.js',
        microfrontend2: 'microfrontend2@http://domain.com/microfrontend2/remoteEntry.js',
      },
      shared: {
        '@angular/core': { singleton: true, strictVersion: true },
        '@angular/common': { singleton: true, strictVersion: true },
        '@angular/router': { singleton: true, strictVersion: true },
        // other shared dependencies
      },
    }),
  ],
};
  • Microfrontend Configuration: Each microfrontend should have its own Webpack configuration using ModuleFederationPlugin to expose itself as a remote entry.

Usage:

  • You can dynamically load a microfrontend in an Angular component using loadRemoteModule() from @angular-architects/module-federation.

2. Routing Integration

Angular 17 came and Bootstrap 5 also. If you are new then you must check below two links:

To integrate multiple microfrontends seamlessly, use Angular’s Router. You can configure the router to load different microfrontends based on routes.

import { loadRemoteModule } from '@angular-architects/module-federation';

const routes: Routes = [
  {
    path: 'microfrontend1',
    loadChildren: () => loadRemoteModule({
      remoteEntry: 'http://domain.com/microfrontend1/remoteEntry.js',
      remoteName: 'microfrontend1',
      exposedModule: './Module'
    }).then(m => m.AppModule)
  },
  {
    path: 'microfrontend2',
    loadChildren: () => loadRemoteModule({
      remoteEntry: 'http://domain.com/microfrontend2/remoteEntry.js',
      remoteName: 'microfrontend2',
      exposedModule: './Module'
    }).then(m => m.AppModule)
  }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

3. State Management

When dealing with multiple microfrontends, maintaining a consistent state across them can be challenging. Consider using a global state management solution like NgRx or a shared JavaScript context (like Redux) that all microfrontends can access.

4. Communication Between Microfrontends

For communication between microfrontends:

  • Custom Events: Use the browser’s custom event system to emit and listen for events.
  • RxJS: Share a BehaviorSubject or a Subject to emit and subscribe to data changes across different parts of the application.

Best Practices

  • Isolation: Ensure each microfrontend is independent in terms of its dependencies and build process.
  • Consistency: Use a design system to keep UI components consistent across different microfrontends.
  • Version Control: Carefully manage versions of shared libraries to avoid conflicts.

By leveraging these strategies, you can effectively manage multiple microfrontends in Angular 17, allowing different teams to work autonomously while maintaining a cohesive application structure.

Jassa

Thanks

therichpost
the authortherichpost
Hello to all. Welcome to therichpost.com. Myself Ajay Malhotra and I am freelance full stack developer. I love coding. I know WordPress, Core php, Angularjs, Angular 14, Angular 15, Angular 16, Angular 17, Bootstrap 5, Nodejs, Laravel, Codeigniter, Shopify, Squarespace, jQuery, Google Map Api, Vuejs, Reactjs, Big commerce etc.

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