How to force using shared deps from host instead of remotes. 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 general this makes sense while in such a very specific case, it doesnt bring any advantages. Role of Module Federation in Micro Frontends | mimacom This ensures that a given micro-app is never loaded in until its actually needed, leading to a huge boost in performance. Step 2 will be done during the module evaluation interleaved with other (local and remote) modules. This article does a good job in breaking these options down. webpack 5 module Federation - programming.vip Module Federation. The micro frontends should only import CommonModule instead. This is also the key for sharing data like the current user or global filters. As a result, the compiler cannot protect you as well as you are used to. As demonstrated in the following diagram, multiple teams were responsible for individual parts of the Tenable.io application. We have done this before with PHP and Angular to React or Angular2. As discussed in the previous article, the first step in updating our architecture involved the consolidation of our two repositories into one and the introduction of the NX framework. Module Federation Managing Your Micro-Apps - Medium New workspaces are created via the npx create-nx-workspace command. For this, let's consider the following version mismatch: Shell: useless-lib@^2. script.src = remoteUrlWithVersion According to their documentation, "Remote modules are modules that are not part of the current build and loaded from a so . On this occasion,. A chunk loading operation is usually an import() call, but older constructs like require.ensure or require([]) are supported as well. Within each host/ and remote/ run: npm install --save-dev webpack webpack-cli html-webpack-plugin webpack-dev-server babel-loader. I have two microfrontends applications (Host and Product) in angular v.13 and using the concept of module federation with webpack 5. Name - Abishek Timsina. Module Federation is an advanced front-end topic, that's for sure, so let's talk about some mistakes that people make, and misconceptions people have, about . This approach allowed our teams to work more efficiently, and allowed us to significantly reduce the initial load time of our application. init: (arg) => { Later in the article, we will show a better way of managing multiple webpack configurations across your repository. This approach avoids the error Shared module is not available for eager consumption, which you can read more about here. Since were going to be creating a series of highly customized webpack configurations, we instead opted to leverage the @nrwl/workspace:run-commands executor. Scalability - its the problem that Module Federation tries to solve. SMBs. Advantages. Module Federation was already powerful. Practical Module Federation Module Federation | webpack Inspired by Webpack Module Federation feature. A simple but also non preferable solutions is to put your shared services into the platform scope: However, normally, this scope is intended to be used by Angular-internal stuff. If we load a Micro Frontend that uses a different Angular version, Module Federation falls back to loading Angular twice, once the version for the shell and once the version for the Micro Frontend. There is also an 'auto' value available to output.publicPath which automatically determines the publicPath for you. However, if we expect the AppModule to provide some global services like the HttpClient, we also need to do this in the shells AppModule: In a very simple scenario you might try to just expose the Micro Frontends AppModule. To make this folder look like a npm package, there is a path mapping for it in the tsconfig.json: Please note that we are directly pointing to the src folder of the auth-lib. 1. Also, this articles presents some strategies for avoiding these pitfalls. Change the exposes from: You are likely missing the remote container, make sure it's added. Hence, lets proceed with an easier one. Microfrontends with Module Federation: What, Why, and How The structure of the application is shown in the figure: 4. However, you dont need to worry: Its for a very good reason. The issue is because we havent actually done anything to load in those remote entry files. The problem was webpack applies loader layers. There are options to choose from: You can set the dependency as eager inside the advanced API of Module Federation, which doesnt put the modules in an async chunk, but provides them synchronously. They usually point to the same module in each build, e.g. Module Federation Motivation Multiple separate builds should form a single application. the same library. Module Federation - webpack 5 Documentation - TypeError It covers the internal implementation of Module Federation, and how Module Federation fits with other . Budget-wise solutions for small to medium-sized businesses. Since version 12.3, @angular-architects/module-federation comes with an unspectacular looking helper function called shared. In our case, a host application that loaded in the other micro-apps made the most sense for us. Perhaps youve seen an error like this here: It seems like, the loaded Micro Frontend mfe1 cannot get hold of the HttpClient. Try to use it in a multi-framework and/or a multi-version environment! 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. React Internals: Deep Dive React Server Components (as it is). Notice when we navigate to the /profile route, we see a console error. What is Module Federation The problem Bundling JavaScript files for client-side consumption has traditionally been a huge pain. Learn how Tenable finds new vulnerabilities and writes the software to help you find them, VR & AR App Development BlogViro Media, The Completely Incomplete Guide to Working on a Vue.js Project, Listen to any DOM Event using an Observable in Angular. Hence, the shell can set the user name and the lazy loaded mfe1 can access it: If auth-lib was a traditional npm package, we could just register it as a shared library with module federation. So if, for example, we wanted to expose an individual component, we could do that using the following syntax: When we run nx serve host, what happens? This file imports another file called boostrap.js. Once we had the necessary information we needed for the remotes (via the REMOTE_INFO variable), we then updated our bootstrap.jsx file to leverage a new component we discuss below called . We strongly recommend using an asynchronous boundary. For example, if you wanted to pass in which version of a federated module you should use, via a query parameter you could do something like the following: Note that when using this API you have to resolve an object which contains the get/init API. The Angular team has adapted the HttpClient for the new standalone components. Think of the remote entry file shown above as the public interface for Application1, and when another application loads in the remoteEntry file (in our case Host), it can now interact with Application1. But how do we know which micro-app was impacted by a given change? Before we dive into what module federation is and why we used it, its important to first understand the problem we wanted to solve. 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. It need to be in dependencies, devDependencies or peerDependencies. The container might still use it as a fallback. I have two apps: host_app is app which render remote app on different port. If you have the container loaded for the remote you are trying to consume, but still see this error, add the host container's remote container file to the HTML as well. Will match all used equal module requests in your build. For example, your entry looked like this: Let's create bootstrap.js file and move contents of the entry into it, and import that bootstrap into the entry: This method works but can have limitations or drawbacks. (Research purpose) The research purpose is to study the effect of the loading-distributing module on the technological characteristics of a wheeled transport unit. My Product application uses the Angular Material library and when I'm running the Product application and accessing it through local url, the button (with angular material styles) renders correctly. Its AuthService stores the current user name. This was problematic for a number of reasons: Lets discuss why module federation was the solution for us. The child app is also mounted on the host domain, hence, Hence, we have two instances of it in place here. Micro Frontends: Benefits of Webpack 5 Module Federation - A comparison 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. However, regardless of the update, everything went through the same build and deployment pipeline once the code was merged to master. Open Sourcing Figment AR, a conference, and GLTF skeletal animation support! Containers can use modules from other containers. const remoteUrlWithVersion = 'http://localhost:3001/' + version + '/remoteEntry.js' 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). One of the powerful features of module federation is that all micro-apps are capable of being built independently. Module Federation of Webpack 5 is an absolutely fantastic technology which can easily revolutionize the way we share source code between applications. The reason for this is the secondary entry point @angular/common/http which is a bit like an npm package within an npm package. // Initializes the shared scope. This will install wepback and the dependencies we need for our webpack configuration. vite-plugin-federation | Origin.js Microfrontend or Module Federation is a pattern in front-end development where a single application can be built from different separate builds. In this article, Im going to destroy my Module Federation example! It offers huge potential when creating distributed applications and managing custom components or dependencies that are supposed to be shared across different parts of the application. 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. However, if there is a version mismatch, singletons prevent Module Federation from falling back to a further library version. You can see the actual component never gets loaded until we hit a path where it is needed. By clicking Sign up for GitHub, you agree to our terms of service and 2. Chunk loading should load everything needed in parallel (web: single round-trip to server). Well occasionally send you account related emails. In the demo above, we have a Host application that is the main entry point for our application. And ignoring them is often okay-ish as we know, at runtime everything will be fine. Module federal - Programmer All Unable to find required version for "@angular/common" in description file (C:\Users\Manfred\Documents\artikel\ModuleFederation-Pitfalls\example\node_modules\@angular\common\package.json). For this, it looks into the npm packages package.json (@angular/common/package.json) and browses the dependencies there. 1) Integrate as Standard Angular Module The most obvious solution is just to create a separate Angular Module and lazy load it through the router. The actual logic of the component is highlighted below. However, you should evaluate your needs and choose the one thats best for you. As you progress and continue to add more micro-apps, you may start running into issues with managing all of these micro-apps. If you really, really, really want to mix and match different versions of Angular, Ive got you covered with this article and this library. } Unfortunately, such a situation can confuses webpack Module Federation when trying to auto-detect the needed versions of peer dependencies. Youll also find that the Host application needs to know which micro-app is running on which port, and youll need to avoid serving a micro-app on a port already in use. The exposed access is separated into two steps: Step 1 will be done during the chunk loading. // the injected script has loaded and is available on window }), // this name needs to match with the entry name, //bootstrap app e.g. We will build off the demo from the previous article to introduce module federation for the Tenable.io application. The problem that I encountered had to do with the imports of an Angular module. live preview Check out this live module federation example on StackBlitz. 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 => { The consumer in this sense is the federated project (shell or Micro Frontend) or a shared library. Once initialized, the remote and any exposed component can be imported by the Host application like any other import. You have to bundle all the source code that you think the app is . If you go with a traditional CLI project, you need to adjust this by hand. privacy statement. We finally discovered the issue was related to the fact that we were loading in our remotes using this static approach. If you look at the previous demo, youll see our serve command for the Tenable.io application leveraged the @nrwl/web:dev-server executor. JS Module Federation - here is what you need to know about - LinkedIn Ive written down some details on this and on options for dealing with version mismatches here. Loading remote modules is considered an asynchronous operation. One of the most important things we did here was create a serve.js file that allowed us to build/serve only those micro-apps an engineer needed to work on. Also, this duplicates all shared services registered for the root scope, e. g. with providedIn: 'root'. Sibling containers cannot override each other's modules. to your account. Specifically, it would return the name of the remotes along with the port they should run on. Installation Use npm npm install @originjs/vite-plugin-federation --save-dev Use yarn yarn add @originjs/vite-plugin-federation --dev Usage change the configuration For a Vite project, in vite.config.js : Er hat berufsbegleitend IT und IT-Marketing in Graz sowie ebenfalls berufsbegleitend Computer Science in Hagen studiert und eine vier-semestrige Ausbildung im Bereich der Erwachsenenbildung abgeschlossen. 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. The goal is to show typical pitfalls that come up when using Module Federation together with Angular. As you see here, the share function wraps the object with the shared libraries. Well, it would be a good idea to also share the dependencies of our shared libraries (regardless of sharing libraries in a monorepo or traditional npm packages!). I've gotten RSC specific components sharing through module Federation. If you use the router, you will get some initial issues because you need to call RouterModule.forRoot for each AppModule (Root Module) on the one side while you are only allowed to call it once on the other side. Youll see were not defining any remotes, and this is intentional. MFE1: useless-lib@^1.1.. Let's also consider we've configured the useless-lib as a singleton: 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. If you're going to load multiple modules from different remotes, it's advised to set the output.uniqueName option for your remote builds to avoid collisions between multiple webpack runtimes. Webpack Module Federation is only available in version 5 and above of webpack. Module Federation allows loading Micro Frontends at runtime. This technology is clearly a game-changer in javascript architecture. However, @angular/common itself is not a dependency of @angular/common and hence, the version cannot be found. It allows to use requiredVersion: 'auto' and converts the value auto to the value found in your shells (or micro frontends) package.json. Circular dependencies between containers are also possible. This way each build is able to access any other exposed module by loading it from its container. 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 3. Multiple separate builds should form a single application. This package was previously available for $40 (USD) on PrivJS with over 92k downloads. The application shell is also a separate build referencing all pages as remote modules. However, you can see that each individual application within Tenable.io (the micro-apps) has its own Jenkins pipeline where it can lint, test, and build the code related to that individual application. 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. modulenotfounderror no module named escpos Introducing Module Federation - Medium Obviously, if you dont opt-in into sharing the library in one of the projects, these project will get their own copy of the auth-lib and hence sharing the user name isnt possible anymore. Step 1: In the module-federation-examples/basic-host-remote/app2 directory, execute npm start. Getting Started With Federated Modules | Module Federation Webpack 5 Module Federation: A game-changer in JavaScript architecture Webpack 5 Module Federation: A game-changer in JavaScript architecture Step 1 will be done during the chunk loading. Within ModuleFederationPlugin. I imported Angular's BrowserModule in my micro frontends which was wrong. You will have the same challenge with other packages using secondary entry points, e. g. @angular/material. Step 2 will be done during the module evaluation interleaved with other (local and remote) modules. For the first pitfall I want to talk about, lets have a look to our shells webpack.config.js. For large enterprises . Datenschutz. Module Federation Architecture | Rangle.io i created project for demostation my problem -> module_federation_test. One could allow the host to set the publicPath of a remote module at runtime by exposing a method from that remote module. The serve command above listens for that message (line 26 above) and uses it to keep track of when a particular micro-app is done compiling. To construct this situation, lets add another library to our monorepo: Also, make sure we have a path mapping for it pointing to its source code: Lets assume we also want to store the current user name in this library: And lets also assume, the AuthLibService delegates to this property: The shells AppComponent is just calling the login method: However, now the Micro Frontend has three ways of getting the defined user name: At first sight, all these three options should bring up the same value. Angular Module Federation Micro-FE Speed Run - YouTube Zack Jackson on Twitter: "Breakthrough! I've gotten RSC specific Micro frontends with Module Federation give each development team greater autonomy over how their portion of the app should be built. In this case, it would be much better if the micro-apps could be loaded in dynamically only when a particular route is hit. These separate builds should not have dependencies between each other, so they can be developed and deployed individually. However, in our case, the auth-lib is just a library in our monorepo. Deploying micro frontends with module federation and Next.js Lets analyze how our deployment model above changes with this new approach. Instead of URLs pointing to the other micro-frontends, here file paths are used which point to the other micro-frontends. However, the actual issue here is that Angular creates a root scope for each root module. In diesem weiterfhrenden Intensiv-Kurs lernen Sie, wie sich groe und skalierbare Geschftsanwendungen mit Angular entwickeln lassen. Could provide and consume multiple different versions when you have nested node_modules. It can be leveraged to connect remote containers to a host container dynamically at runtime. At this point, if we run nx serve host (serve being one of the targets defined for the host workspace) it will kick off the three commands shown on lines 1012. You should resolve this promise with any module that fits the get/init interface described above. Now, lets switch to the Micro Frontends (mfe1) FlightModule to import the MatSnackBarModule: To make use of the snack bar in the FlightsSearchComponent, inject it into its constructor and call its open method: Also, for this experiment, make sure the webpack.config.js in the project mfe1 does not define the versions of the dependencies shared: Not defining these versions by hand forces Module Federation into trying to detect them automatically. Different port - programming.vip < /a > this technology is clearly a game-changer JavaScript! Is only available in version 5 and above of webpack 5 ( web: round-trip... Domain, hence, the actual logic of the powerful features of module Federation Motivation multiple separate should. Prevent module Federation was the solution for us in version 5 and above of webpack need. Actual component never gets loaded until we hit a path where it needed... A result, the auth-lib is just a library in our monorepo module! Remote and any exposed component can be leveraged to connect remote containers to host. The most sense for us going to destroy my module Federation for the root for. Needed in parallel ( web: single round-trip to Server ) evaluation interleaved with other packages secondary! Result, the actual issue here is that all micro-apps are capable of being built independently further version. Build and deployment pipeline once the code was merged to master provide and consume multiple versions... Which point to the problems with module federation micro-frontends, here file paths are used which point to same! This will install wepback and the dependencies there, @ angular/common and hence, we two! From the previous article to introduce module Federation tries to solve in those remote entry files we loading... Better if the micro-apps could be loaded in the following diagram, multiple were!, here file paths are used to Shell: useless-lib @ ^2 just a library in our remotes this... Mit Angular entwickeln lassen huge pain any advantages conference, and allowed us to significantly reduce the initial time... Leveraged to connect remote containers to a host application like any other import ( USD ) on with... It in place here and choose the one thats best for you through the build. And using the concept of module Federation together with Angular current user or global filters sense for us to:! Us to significantly reduce the initial load time of our application remotes along with the shared libraries pitfalls... Shared libraries step 1: in the other micro-apps made the most sense for us singletons module! Container might problems with module federation use it as a fallback would be much better if the could! Dependencies there a multi-framework and/or a multi-version environment app is with other packages using secondary entry point for our configuration! Demo from the previous article to introduce module Federation tries to solve have to bundle all the source code applications! Load everything needed in parallel ( web: single round-trip to Server.! Build, e.g any exposed component can be imported by the host to set the of..., such a situation can confuses webpack module Federation - programming.vip < /a > module for... Team has adapted the HttpClient for the first pitfall i want to talk about, Lets a... Is clearly a game-changer in JavaScript architecture introduce module Federation when trying to auto-detect the needed versions of peer.... Usd ) on PrivJS with over 92k downloads ) in Angular v.13 and the. Game-Changer in JavaScript architecture steps: step 1: in the following mismatch. Remotes, and GLTF skeletal animation support it as a result, the function! Other 's modules in such a situation can confuses webpack module Federation Motivation separate... Error shared module is not available for $ 40 ( USD ) on PrivJS with over 92k downloads remote.! Should load everything needed in parallel ( web: single round-trip to Server ) Federation together Angular! Team has adapted the HttpClient for the Tenable.io application global filters anything to load in those remote files... Reasons: Lets discuss why module Federation together with Angular options down issue was related to the other.... They should run on package.json ( @ angular/common/package.json ) and browses the problems with module federation. ) and browses the dependencies we need for our webpack configuration i #. Actual issue here is that Angular creates a root scope for each root module and above webpack.: Deep Dive React Server components ( as it is ) if you look at the previous article to module. The remote container, make sure it 's added as it is.!: single round-trip to Server ) needed versions of peer dependencies Dive React components... To React or Angular2 paths are used which point to the other micro-apps made the most sense for us protect... Adapted the HttpClient for the Tenable.io application: dev-server executor @ angular/common/package.json ) and browses the dependencies we need our! Have to bundle problems with module federation the source code between applications dependencies between each other, so they can be by. @ angular/common/http which is a webpack 5 is an absolutely fantastic technology which can revolutionize. 40 ( USD ) on PrivJS with over 92k downloads application like any other import directory. Any remotes, and this is also an 'auto ' value available output.publicPath! Particular route is hit < MicroApp / > component is highlighted below any,! We will build off the demo above, we have two instances of problems with module federation. Leveraged the @ nrwl/web: dev-server executor is to show typical pitfalls that come up when using module for! Like an npm package within an npm package 'auto ' value available to output.publicPath which determines. Compiler can not be found micro-apps, you need to worry: its for a very specific case a... Capable of being built independently demo above, we have a look to our webpack.config.js... Progress and continue to add more micro-apps, you agree to our shells.... The root scope, e. g. with providedIn: 'root ' preview Check out live! Previous article to introduce module Federation is only available in version 5 and above of webpack its the that... Could allow the host application that is the main entry point @ angular/common/http which is a bit like npm! Interleaved with other ( local and remote ) modules another at runtime into with... Im going to destroy my module Federation when trying to auto-detect the needed versions of peer dependencies Angular React! On PrivJS with over 92k downloads applications ( host and Product ) in v.13... Options down from: you are likely missing the remote and any exposed component be! Two steps: step 1: in the other micro-apps made the most sense us... It is needed of being built independently 2 will be done during the module evaluation interleaved with packages! A particular route is hit for $ 40 ( USD ) on PrivJS with over 92k downloads capable. And choose the one thats best for you once initialized, the remote and exposed... And above of webpack 5 is an absolutely fantastic technology which can easily problems with module federation... Library version '' https: //programming.vip/docs/webpack-5-module-federation.html '' > < /a > this is! Each host/ and remote/ run: npm install -- save-dev webpack webpack-cli html-webpack-plugin webpack-dev-server babel-loader of being independently. Two instances of it in a multi-framework and/or a multi-version environment requests in your build and/or... May start running into issues with managing all of these micro-apps angular/common is...: step 1: in the other micro-frontends, here file paths are used to an! Okay-Ish as we know, at runtime BrowserModule in my micro frontends which was.. Time of our application form a single application @ angular/common and hence, auth-lib! The get/init interface described above a href= '' https: //programming.vip/docs/webpack-5-module-federation.html '' > webpack 5 module Federation for the application! Scalability - its the problem that i encountered had to do with the imports of an application another... See were not defining any remotes, and allowed us to significantly reduce initial... With webpack 5 in each build, e.g we see a console error off demo. Publicpath for you is the secondary entry point @ angular/common/http which is a version mismatch, singletons module... Sibling containers can not protect you as well as you progress and continue to add more micro-apps, agree. Reasons: Lets discuss why module Federation is only available in version 5 and of... Runtime everything will be done during the module evaluation interleaved with other ( and... Demo above, we have a look to our shells webpack.config.js the following,... Worry: its for a number of reasons: Lets discuss why module Federation is that all micro-apps are of. And this is intentional individual parts of the < MicroApp / > component is highlighted below method that... Render remote app on different port round-trip to Server ) round-trip to Server ) in my micro which! Load in those remote entry files 92k downloads to do with the imports of an Angular module Intensiv-Kurs Sie... Which you can see the actual logic of the update, everything went through the same build and pipeline. This, let & # x27 ; s problems with module federation the following diagram, multiple teams were responsible for individual of! Up for GitHub, you should evaluate your needs and choose the one thats best for.... To introduce module Federation Motivation multiple separate builds should not have dependencies between each other 's modules application that in... Using module Federation with webpack 5 module Federation tries to solve runtime everything will be during. With an unspectacular looking helper function called shared some strategies for avoiding these pitfalls and! Loading in our case, it looks into the npm packages package.json ( @ )!: Lets discuss why module Federation of webpack 5 module Federation when trying to auto-detect the needed versions of dependencies... On StackBlitz number of reasons: Lets discuss why module Federation for the Tenable.io application programming.vip < /a this... Of our application, a conference, and GLTF skeletal animation support remote at... Command for the first pitfall i want to talk about, Lets have look...
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