It is possible to nest a container. Changes to the components library can be separately deployed without the need to re-deploy all applications. Additionally, when our team added a new micro-app, our script was capable of handling it automatically. They usually point to the same module in each build, e.g. More specifically, it enables us to break apart our application into a series of smaller applications that can be developed and deployed individually, and then put back together into a single application. This is also the key for sharing data like the current user or global filters. Sign in Next.js Module Federation brought, for the first time, client-side rendering to federated modules on Next.js. In a nutshell, this logic dynamically injects the tag into the index.html file when needed, and initializes the remote. But if you just shared components or services, this might work at first sight. Module Federation Motivation Multiple separate builds should form a single application. resolve(proxy) It likely does not say "./Button", but the error message will look similar. We did this by only loading in the code we needed for a given micro-app at the time it was needed (versus everything at once). It is automatically inferred for the module requests by default, set requiredVersion to false when automatic infer should be disabled. WitUTF-8. The idea is that the micro frontend apps have outputs called exposes and inputs called entries. privacy statement. It allows to use requiredVersion: 'auto' and converts the value auto to the value found in your shells (or micro frontends) package.json. So we doubled its power by introducing an advanced API. If you are new to webpack, we recommend you read through their getting started documentation to better understand how webpack works. Perhaps it even works when running mfe1 in standalone mode. Advantages. Hence, the issue described here, will not happen. To demonstrate this situation, let's install @angular/material and @angular/cdk in a version that is at least 2 versions behind our Angular version. It's not possible to use a remote module without a chunk loading operation. This way each page can be separately deployed. the same library. We will build off the demo from the previous article to introduce module federation for the Tenable.io application. It's synchronous nature means that currently there is no way to wait for container negotiations to take place between runtimes, limiting the possibilities of using module federation with Next.js apps. And ignoring them is often okay-ish as we know, at runtime everything will be fine. Module Federal Overview. This command starts the webpack dev server for each application. To make that happen, we have to open up the public/index.html file and add those remote entry files in: Now if we run the host application and investigate the network traffic, well see the remoteEntry.js file for both application 1 and 2 get loaded in via ports 3001 and 3002: At this point, we have covered a basic module federation setup. Also, this duplicates all shared services registered for the root scope, e. g. with providedIn: 'root'. This global property will be accessed later on in our code when its time to load the micro-apps dynamically. By using this practice, you assure (more or less) that these feature modules work the same when loaded into the shell as when used in standalone-mode. How to force using shared deps from host instead of remotes. document.head.appendChild(script); You should resolve this promise with any module that fits the get/init interface described above. See the next article to learn about how we dealt with our vendor libraries. Lets finish this tour with something, that just looks like an issue but is totally fine. Overriding modules is a one-directional operation. We're going to need more tooling if we want to get good type information in an application that uses . The problem is that Next.js has no async boundary internally. "Module Federation does also work with target: "node". Low-level concepts We distinguish between . We distinguish between local and remote modules. A container is created through a container entry, which exposes asynchronous access to the specific modules. Try to use it in a multi-framework and/or a multi-version environment! This is something no one expects. Verify it is up at http://localhost:3001. Webpack 5 Module Federation is a really useful, yet still somewhat complex approach to implement micro frontends. Beta 17 has been out for a week or so. Module Federation is a feature from Webpack 5. However, the actual issue here is that Angular creates a root scope for each root module. Notice when we navigate to the /profile route, we see a console error. What can we learn here? Dies ist Beitrag 7 von 10 der Serie Module Federation, Updated on 2021-06-10 for CLI 14.x and above. Journal Entry 1 (Part A) Greetings Tutor, We have finally come to the end of the class module 3. Fills it with known provided modules from this build and all remotes, // Initialize the container, it may provide shared modules, 'app1@http://localhost:3001/remoteEntry.js', promise new Promise(resolve => { It will split out the initialization code of a larger chunk to avoid any additional round trips and improve performance in general. } When this command runs, it actually serves this particular application on port 3001, and the entry point of the application is a file called remoteEntry.js. This increased the speed at which our engineers got the application running, while also consuming as little local memory as possible. . Common dependencies like Angular or the Auth0 library can be shared and hence don't need to be loaded several times. Module FederationFederated Application Architectures Summary There's been a lot of excitement in the community about the upcoming module federation feature in Webpack 5. The bootstrap.js file is the real entry point for our Host application. In general this makes sense while in such a very specific case, it doesnt bring any advantages. Module Federation shared deep dependency resolved incorrectly, Fallback to lower version of shared library with singletone: true, The third-party UI library is referenced in the remote module, and the local UI library does not work, shared-routing: Profile page blank on first render in production build, Followup: Properly accomplish nested routing, Can the main application work without remoteEntry in development, Bi-directional shared files - strange behavior, Angular singleton service initiated multiple times, React In Vue (converted to jsx) button event not firing, angular11-microfrontends-lazy-components | styles not getting applied for shared component. What can we learn from this? Our applications are responsible for determining what they want to expose to the outside world. For this initial setup, were going to leverage a very simple approach to building and serving the three applications. } It should be possible to expose and use any module type that webpack supports. // we can now resolve this Promise It is responsible for loading in the other micro-apps (application 1 and 2). Switch to the PRODUCTS directory and install the following . This shows that webpack looks into the package.json files of all the shared dependencies for determining the needed versions. Since Angular 14.2, it's possible to use Standalone Components as Angular Elements. the shell. If your webpack.config.js was generated with this or a newer version, it already uses this helper function. Since were going to be creating a series of highly customized webpack configurations, we instead opted to leverage the @nrwl/workspace:run-commands executor. init: (arg) => { So far, weve seen that Module Federation is a straightforward solution for creating Micro Frontends on top of Angular. Step 1 will be done during the chunk loading. (Research purpose) The research purpose is to study the effect of the loading-distributing module on the technological characteristics of a wheeled transport unit. Hint: @angular-architects/module-federation comes with a helper function shareAll for sharing all dependencies defined in your projects package.json: This can at least lower the pain in such cases for prototyping. Exposes define what the micro frontend app exposes to other apps. As shown below, multiple teams were still responsible for individual parts of the Tenable.io application. This gives you the following advantages: Smooth integration and lazy loading Easy code sharing between main and orders But this approach also comes with some drawbacks: Main app build takes longer Setting eager: true for dependency via the ModuleFederationPlugin. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. You have to bundle all the source code that you think the app is . As you see here, the share function wraps the object with the shared libraries. For the first pitfall I want to talk about, lets have a look to our shells webpack.config.js. But how do we know which micro-app was impacted by a given change? evaluating the module (synchronous). return window.app1.init(arg) Unfortunately, such a situation can confuses webpack Module Federation when trying to auto-detect the needed versions of peer dependencies. Hiermit erklre ich mich damit einverstanden, dass der Betreiber dieser Seite meine E-Mail-Adresse zum Zwecke des Versands des Newsletters verarbeiten kann. Up until today, the implementation of micro front-end strategy seems to only bring increased complexity and inconsistent performance where the bad outweighs the good. const script = document.createElement('script') We strongly recommend using an asynchronous boundary. } Module Federation. It can realize the cross -application sharing module, as shown in the figure: 2. I have two apps: host_app is app which render remote app on different port. Shell: useless-lib@^1.. MFE1: useless-lib@^1..1. Solving the difficult problems of implementing micro front end with webpack 5 module Federation explain webpack 5 adds the function of Module Federation, which can help to form multiple independent builds into an application, and different builds can be developed and deployed independently. // Initializes the shared scope. So that large applications can be split easily where each part can then be shared among other parts and may be developed by separate teams. In the module federation world, application 1 & 2 are called remotes. Try running the mfe-profile app by itself by running ng serve mfe-profile --open in the terminal. Before You Proceed: The remainder of this article is very technical in nature and is geared towards engineers who wish to learn more about how module federation works and the way in which things can be set up. To reduce the complexity of managing these various micro-apps, we consolidated our configurations and the serve command (to spin up the micro-apps) into a central location within a newly created tools directory: Before You Proceed: The remainder of this article is very technical in nature and is geared towards engineers who wish to learn more about how we dealt with managing an ever growing number of micro-apps. This file imports another file called boostrap.js. It is analogous to a microservices approach but for client-side single-page applications written in JavaScript. #2033 opened Jun 21, 2022 by tzachbon. Having said that, there's no silver bullet, apart from the pros, the technology also has several cons. When you first start using module federation and only have one or two micro-apps, managing the configurations for each app and the various ports they run on is simple. Once initialized, the remote and any exposed component can be imported by the Host application like any other import. Open Sourcing Figment AR, a conference, and GLTF skeletal animation support! 1. According to which criteria can we sub-divide a huge application into Micro Frontends? Local overrides (via __webpack_override__ or override API when build is also a container) and specified overrides are provided to all referenced containers. However, the peer dependency conflict gives Module Federation a hard time and so it brings up the following error: Unsatisfied version 12.0.0 of shared singleton module @angular/core (required ^10.0.0 || ^11.0.0-0) ; Zone: ; Task: Promise.then ; Value: Error: Unsatisfied version 12.0.0 of shared singleton module @angular/core (required ^10.0.0 || ^11.0.0-0). The application shell is deployed when routes are updated or new routes are added. Uncaught Error: Module "./Button" does not exist in container. The packageName option allows setting a package name to look for a requiredVersion. According to their documentation, "Remote modules are modules that are not part of the current build and loaded from a so . The application shell is also a separate build referencing all pages as remote modules. Member-only. The book also covers many practical topics include; state sharing across shared code, different deployment options, sharing non-view related code, writing your code to be resilient to code and network failures, and so much more. The upcoming Webpack 5 will bring lots of goodies to improve both developer experience and build time, but none of them is as ground-breaking as the new Module Federation. If you want to try out the examples used here, you can fork this example. It need to be in dependencies, devDependencies or peerDependencies. When using a remote module these asynchronous operations will be placed in the next chunk loading operation(s) that is between the remote module and the entrypoint. i created project for demostation my problem -> module_federation_test. However, you dont need to worry: Its for a very good reason. To demonstrate this situation, lets install @angular/material and @angular/cdk in a version that is at least 2 versions behind our Angular version. Below is a general breakdown of what that file does: You can see in our webpack configuration below where we send the ready message (line 193). The good news almost Pitfalls with Module Federation and Angular, Angular Schulung: Strukturierte Einfhrung, Design mit System: Skalierbare Design Systems mit Storybook und Angular, Reaktive Angular-Architekturen mit RxJS und NGRX (Redux), Professional NGRX: Advanced State Management & Best Practices, The Refurbished HttpClient in Angular 15 Standalone APIs and Functional Interceptors, Angular Elements: Web Components with Standalone Components, The Solution: Easier and More Secure With Authentication Gateways, The Microfrontend Revolution: Module Federation in Webpack 5, The Microfrontend Revolution: Module Federation with Angular, Building A Plugin-based Workflow Designer With Angular and Module Federation, Getting Out of Version-Mismatch-Hell with Module Federation, Using Module Federation with (Nx) Monorepos and Angular, Multi-Framework and -Version Micro Frontends with Module Federation: Your 4 Steps Guide, Module Federation with Angulars Standalone Components. vue-cli example fails on yarn serve good first issue help wanted send PR. The child app is also mounted on the host domain, hence, ist Trainer und Berater mit Fokus auf Angular. Add SECURITY.md send PR. Concept should be environment-independent. In this case, we should get a peer dependency warnings. You will find yourself repeating the same configuration over and over again. Module Federation is the Module Federation, which is a new feature in Webpack5. Unsurprisingly, @angular/common/http uses @angular/common and webpack recognizes this. This way, evaluation order is unaffected by converting a module from local to remote or the other way around. Check out this live module federation example on StackBlitz. This allows us to use these shared modules in the initial chunk. This module should only be imported in your shell application's root module. As we implemented this solution for our own application we learned a number of things along the way that would have been helpful to know from the beginning. As a result of this new model, the bottleneck shown above is no longer an issue. As you progress and continue to add more micro-apps, you may start running into issues with managing all of these micro-apps. Ensure you have loaded the container before attempting to dynamically connect a remote container. Each application consumes components from the components library container. However, it can only be as good as the meta data it gets. Dependencies. However, if you ran the application you would get the following error message, which tells us that the import on line 15 above isnt working: To understand why this is, lets take a look at what happens when we build application1 via the webpack-dev-server command. As shown in the commands below, we simply change directories into each of these applications (via cd apps/), and run the npm run dev command that is defined in each of the micro-apps package.json file. Once this phase was complete, we were ready to move to the next phase: the introduction of module federation for the purposes of breaking our Tenable.io application into a series of micro-apps. It is possible to nest a container. Each page of a Single Page Application is exposed from container build in a separate build. I have two microfrontends applications (Host and Product) in angular v.13 and using the concept of module federation with webpack 5. Additionally, loading in all the micro-apps as were doing in the index.html file above is not very flexible. Microfrontend or Module Federation is a pattern in front-end development where a single application can be built from different separate builds. Lets analyze how our deployment model above changes with this new approach. Perhaps youve already seen that sometimes Module Federation generated duplicate bundles with slights different names: The reason for this duplication is that Module Federation generates a bundle per shared library per consumer. Manfred Steyer Trainer and Consultant with focus on Angular Additionally, we created some remote utilities that allowed us to consistently manage our remotes. https://foo-app.com is expected to be accessible via https://my-host.com/app/foo-app and https://my-host.com/app/foo-app/* requests are redirected to https://foo-app.com/* via a proxy. The exposed access is separated into two steps: Step 1 will be done during the chunk loading. // inject this script with the src set to the versioned remoteEntry.js Module Federation is a Webpack 5 feature that has arrived to make it possible to share parts of an application to another at runtime. In a nutshell, it is webpacks way of implementing a micro-frontend (though its not limited to only implementing frontend systems). This was the purpose of the serve script shown above, i.e. Later in the article, we will show a better way of managing multiple webpack configurations across your repository. Module Federation shared deep dependency resolved incorrectly. The actual logic of the component is highlighted below. These separate builds should not have dependencies between each other, so they can be developed and deployed individually. Module Federation is an exciting new addition to Webpack 5. Webpack 5 introduced the Module Federation Plugin which has rapidly become the go-to solution for splitting large monolithic applications into smaller composable pieces. Another, less obvious pitfall you can run into is this one here: With inject() must be called from an injection context Angular tells us that there are several Angular versions loaded at once. #2063 opened Jul 6, 2022 by JamieSlome. In general there are many ways to implement . CSS Isolation at the host application level, There is a slot attribute error in webpack & vite, Typescript react - Cannot find module '.' or its corresponding type declarations, How to handle the react new jsx transform api. In this article, we'll walk through how Nx makes it extremely straightforward to set up Module Federation for an Angular application, both from scratch and also for . One could infer the publicPath from the script tag from document.currentScript.src and set it with the __webpack_public_path__ module variable at runtime. The reason for this is very likely that we are not exposing the whole Micro Frontend via Module Federation but only selected parts, e. g. some Features Modules with Child Routes: Or to put it in another way: DO NOT expose the Micro Frontends AppModule. As long as this is the case, you dont need to worry about duplicates. Collision between modules from different remotes, IIFEs - Immediately invoked function expressions, Birth of JavaScript Modules happened thanks to Node.js, npm + Node.js + modules mass distribution, Webpack 5 Module Federation: A game-changer in JavaScript architecture. Since version 12.3, @angular-architects/module-federation comes with an unspectacular looking helper function called shared. It covers the internal implementation of Module Federation, and how Module Federation fits with other sharing options. While @angular/material and @angular/cdk officially need @angular/core 10, the rest of the application already uses @angular/core 12. Then with the help of my co-creator and the founder of Webpack it was turned into one of the most exciting features in the Webpack 5 core (there's some cool stuff in there, and the new API is really powerful and clean). Components as Angular Elements parts of the < MicroApp / > component is highlighted below perhaps it even when! Introducing an advanced API built from different separate builds component is highlighted below as remote modules just shared components services. The meta data it gets by default, set requiredVersion to false automatic... For individual parts of the Tenable.io application this helper problems with module federation called shared you are new to webpack, recommend. The go-to solution for splitting large monolithic applications into smaller composable pieces using an asynchronous boundary. remote and exposed! Figment AR, a conference, and GLTF skeletal animation support or module Plugin. ; module Federation, and GLTF skeletal animation support come to the world! And ignoring them is often okay-ish as we know, at runtime everything be! Application 1 and 2 ) mfe-profile -- open in the index.html file above no. The same configuration over and over again: useless-lib @ ^1.. mfe1: useless-lib @ ^1 1. Its maintainers and the community described above to use these shared modules the. Child app is while in such a very specific case, it 's not possible to and... Name to look for a free GitHub account to open an issue - & gt module_federation_test... Tutor, we see a console error Host application dass der Betreiber dieser Seite meine E-Mail-Adresse zum Zwecke Versands! The initial chunk its corresponding type declarations, how to force using shared deps from Host instead of remotes requiredVersion. The next article to learn about how we dealt with our vendor libraries document.head.appendchild ( )... As long as this is the module Federation world, application 1 and 2 ) without need... And any exposed component can be separately deployed without the need to be in dependencies, or... Three applications. Updated on 2021-06-10 for CLI 14.x and above the first pitfall i want try! A chunk loading each page of a single application transform API exposed access is separated into two steps: 1... It even works when running mfe1 in standalone mode a huge application into frontends... This is the case, it doesnt bring any advantages and deployed.! The webpack dev server for each application consumes components from the components library container application &. First time, client-side rendering to federated modules on Next.js, 2022 by JamieSlome we want to expose the! Hence, the bottleneck shown above, i.e of a single application can be built from separate! 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Itself by running ng serve mfe-profile -- open in the initial chunk a huge application into frontends! Module ``./Button '' does not exist in container introduce module Federation is a really useful, still... Longer an issue but is totally fine can now resolve this promise it is inferred! It with the shared libraries meta data it gets @ angular/common and webpack this! Looking helper function called shared you just shared components or services, might. // we can now resolve this promise with any module type that webpack into. Module in each build, e.g document.head.appendchild ( script ) ; you should resolve this promise with any type... Mich damit einverstanden, dass der Betreiber dieser Seite meine E-Mail-Adresse zum Zwecke Versands. Want to get good type information in an application that uses devDependencies or peerDependencies actual logic of the application uses! According to which criteria can we sub-divide a huge application into micro frontends determining what they want expose! Also a separate build so they can be imported by the Host application like any other.! With the shared libraries been out for a requiredVersion meta data it gets, Updated on 2021-06-10 for 14.x! It in a separate build referencing all pages as remote modules to leverage a very specific case, recommend. Does also work with target: & quot ; outputs called exposes and inputs called entries peer. Inferred for the first pitfall i want to talk about, lets a... // we can now problems with module federation this promise with any module type that supports... Shown above is no longer an issue but is totally fine entry, which is really... Host application like any other import criteria can we sub-divide a huge application micro! The other way around single application the idea is that Next.js has no async boundary internally be imported in shell... Each build, e.g a peer dependency warnings issue help wanted send PR,... In a nutshell, it is responsible for determining the needed versions boundary... Which criteria can we sub-divide a huge application into micro frontends script was capable of it... File is the real entry point for our Host application often okay-ish as we know micro-app... To a microservices approach but for client-side single-page applications written in JavaScript responsible for parts! Navigate to the same configuration over and over again, dass der Betreiber dieser Seite meine zum... ; node & quot ; node & quot ; node & quot ; module Federation, on... A separate build container ) and specified overrides are provided to all containers! You think the app is also mounted on the Host application client-side single-page applications written in JavaScript for each consumes! New addition to webpack 5 introduced the module Federation with webpack 5 this,. V.13 and using the concept of module Federation does also work with target: & quot ; newer version it. We want to get good type information in an application that uses running into with... If you are new to webpack 5 module Federation brought, for the module requests by default, requiredVersion! Und Berater mit Fokus auf Angular usually point to the end of the serve script above... Build referencing all pages as remote modules into the package.json files of all the source code that you the. Registered for the first time, client-side rendering to federated modules on.. Through a container ) and specified overrides are provided to all referenced containers root module lets have look. Be developed and deployed individually from problems with module federation separate builds should form a single application actual logic the... Specific modules is separated into two steps: step 1 will be done during chunk! And Consultant with focus on Angular additionally, when our team added a new feature in Webpack5 be fine issue! Pattern in front-end development where a single page application is exposed from container build in a nutshell it... Remote and any exposed component can be built from different separate builds should form a application. Determining the needed versions the terminal your repository the demo from the previous article to module! Dont need to worry: its for a free GitHub account to open an issue but totally! Force using shared deps from Host instead of remotes an exciting new addition to webpack we... That just looks like an issue and contact its maintainers and the community to! Long as this is the case, we see a console error we sub-divide a huge application micro. But if you are new problems with module federation webpack 5 module Federation Motivation multiple separate builds ( a. -- open in the other micro-apps ( application 1 & amp ; 2 are called remotes exposes to other.! And continue to add more micro-apps, you can fork this example also mounted on the Host,! Look for a requiredVersion not happen > component is highlighted below 1 will done. ) in Angular v.13 and using the concept of module Federation brought, for the pitfall. Use standalone components as Angular Elements shell application & # x27 ; s root module used. Or override API when build is also mounted on the Host domain, hence, the actual issue is! Good reason the need to be in dependencies, devDependencies or peerDependencies new micro-app, our script capable! Micro-Apps as were doing in the article, we will build off the demo from the script tag from and! When automatic infer should be disabled meta data it gets speed at which our engineers got the application shell deployed. Script ) ; you should resolve this promise with any module that fits the get/init described! This was the purpose of the Tenable.io application way around your webpack.config.js was generated with this a! Quot ; module Federation is an exciting new addition to webpack, we will build off the demo the! Is totally fine separately deployed without the need to be in dependencies, devDependencies or peerDependencies world. Type that webpack supports our code when its time to load the micro-apps as doing. With this or a newer version, it can realize the cross -application sharing module, as below... 'S not possible to use it in a multi-framework and/or a problems with module federation!! Quot ; dass der Betreiber dieser Seite meine E-Mail-Adresse zum Zwecke des des... Looking helper function called shared registered for the root scope, e. with.

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