The section shared points to the libraries shared with the shell. The issue of dependencies is the most important thing here, because it's harder to debug. I have a Git Repo that illustrates my problems.. We've also used the main federated module as a shared library for all of our applications. As mentioned above, the usage of shareAll allows for a quick first setup that "just works". In order to make module federation work, we need to bootstrap the app asynchronously. This is post 2 of 10 in the series Module Federation, 2020-10-13: Updated to use webpack 5 and Angular CLI 11.0.0-next.6. The microfrontend also referred to as a remote with terms of module federation looks like an ordinary Angular application. Is it considered harrassment in the US to call a black man the N-word? I started from a working example, then generated a new lib (ng generate library mdmf-shared) and exposed a single Injectable from the library's public-api.I import this service into my shell and my microfrontend with no . Do you have a full example you can share? Despite having remote and host containers initialize at runtime, you can still leverage all of Module Federation's current features (library negotiation, etc.) According to which criteria can we sub-divide a huge application into micro frontends? That'll be great! What is the deepest Stockfish evaluation of the standard initial position that has ever been done? Start by creating a new project folder with the following package.json to allow us to run our two SPAs at the same time: To ease the TypeScript compiler, we need a typing for it: Also, we need to tell webpack that all paths starting with mfe1 are pointing to an other project. More information about dealing with version mismatches can found in a further article of this series. Hence, Module Federation can decide on the versions to use and actually load them. 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). Module Federation Sharing Library Code; . The first HomeComponent exposes a single Angular Component file while the second ShellModule exposes a module. SQL PostgreSQL add attribute from polygon to all points inside polygon but keep all points not just those that fall inside polygon. Make sure you have a fitting version if you try out the examples outlined here! This makes complete sense but i can't get it to work, If I reference the local library this way I inevitably end up with errors during builds, The examples I posted are simplified. This is particularly important in angular for things like global auth services. Creating a federated UI library this way works really well, and something that I feel could be quite advantageous for larger teams working with Single Page Applications wanting to have an option to NPM or the like. The shared library contains code and application state we want to share across the site. Step 1 will be done during the chunk loading. There are no errors or anything -- things just don't work like you expect. The . "singleton:true" shares the same instance of the shared module across your federated modules. This is the foundation of micro frontends. https://github.com/webpack/webpack/issues/15164, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. While this doent seem to make a lot of sense at first glance, its a typical pattern you find in Module Federation-based applications. Also, be careful that all provided and fallback modules will always be downloaded when this hint is enabled. One application can dynamically run code from another bundle or build, on the client and the server. live preview Check out this live module federation example on StackBlitz. This hint only allows a single version of the shared module in the shared scope (disabled by default). Making statements based on opinion; back them up with references or personal experience. Thus, it is critical to have only one instance of the library running at a time. When you apply the same sort of diagram shown above for this app, it looks like this: . I might not be understanding the question tho. Let's explore some of the patterns and use-cases for module federation. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. How to generate a horizontal histogram with words? Each project exposes code that will be consumed by others. Check out this live module federation example on StackBlitz. The helper function share used in this generated configuration replaces the value 'auto' with the version found in your package.json. Evergreen Design System/Component Library An evergreen remote is one of the simplest types of federated applicationa shared remote, such as a Design System or a Component library, gets independently released, which automatically updates it for all consumers. Now on to the actual UI library exposed by the UI team through MF, btw - read my previous post about micro-frontends SPAs using MF if you feel you need more examples to follow along. This file is where we add in the wiring for the hosts, remotes, shared code, and shared dependencies in the Module Federation plugin. At this point you should have a fairly good grasp on how both vendor libraries and custom libraries are shared in the module federation system. The requested shared module is looked up under this key from the shared scope. Make sure you've structured your shared config correctly in webpack.config.ts. Hopefully not overly so, but here is a link to a repo that shows the issue. This is also the key for sharing data like the current user or global filters. However, it might lead to too much shared bundles. For this property, The generated configuration uses the helper method shareAll that is basically sharing all the dependencies found in your package.json. The consumer in this sense is the federated project (shell or Micro Frontend) or a shared library. It uses the router to lazy load a FlightModule: However, the path mfe1/Module which is imported here, does not exist within the shell. react, react-dom). Would it be illegal for me to act as a Civillian Traffic Enforcer? What is the function of in ? For example, it is likely that components that were compiled with completely different Angular versions will not work together at runtime. The above configuration shows how to expose two different files. Step 5: Add a Shared Library to Hold Module Federation Operation. To learn more about Module Federation, review the technology's website. Generally speaking, we're using this to point to code that is bundled into our app by Webpack. While this doen't seem to make a lot of sense at first glance, it's a typical pattern you find in Module Federation-based applications. The code you normally find in the file main.ts was moved to the bootstrap.ts file loaded here. I tried to follow another example by ScriptedAlchemy, but I can't figure out how to make it work. We have to use those aliases, but tell webpack where to find the libraries by using the import option. What is the effect of cycling on weight loss? rev2022.11.3.43005. Please note that the webpack.config.js is only a partial webpack configuration. Like always, the code for this example is at my Github in case you feel like checking that out. Saving for retirement starting at 68 years old. evaluating the module (synchronous). Why does the sentence uses a question form, but it is put a period in the end? My second problem was that I was attempting to share common facades that depended on common data access services. Important: This article is written for Angular and Angular CLI 14 and higher. After that, you can use the init schematic: The command line argument --type was added in version 14.3 and makes sure, only the needed configuration is generated. Module Federation is really clever when it comes to auto-detecting details and compensating for version mismatches. I had to share the @angular/material/icon specifically to share the singleton across every MFE. This hint allows webpack to reject the shared module if version is not valid (defaults to true when local fallback module is available and shared module is not a singleton, otherwise false, it has no effect if there is no required version specified). See the latest Laberweinting, Bavaria, Germany RealVue weather satellite map, showing a realistic view of Laberweinting, Bavaria, Germany from space, as taken from weather satellites. . Found footage movie where teens get superpowers after getting struck by lightning? With Module Federation you can share not just modules, but other file types. This is a tiny file generated by webpack when building the remote. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Low-level concepts We distinguish between . TL;DR. Make sure any module dependencies your shared services have are also shared. The promise of rapid delivery of performant product-based user experiences has never been more achievable through module federation. 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.. 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. Manfred Steyer Trainer and Consultant with focus on Angular The property shared defines the npm packages to be shared between the shell and the microfrontend(s). LO Writer: Easiest way to put line of words into table as rows (list). Module Federation allows loading Micro Frontends at runtime. There are three ways to specify the versions of shared libraries. But have you had a look into your main.ts? Find centralized, trusted content and collaborate around the technologies you use most. This approach is good for prototyping, but it will not allow you to scale to large production environment given that libraries like react and react-dom will require additional requirements. I'm using (at the moment) Angular 11.0.0-next and Webpack 5, which is only available as an opt-in with ng11 . is a trainer and consultant with a focus on Angular. Not the answer you're looking for? One also has to deal with possible version conflicts. Big thanks to Zack Jackson, the mastermind behind Module Federation, who helped me bypassing some pitfalls. Eg. This provided module also acts as fallback module if no shared module is found in the shared scope or version isn't valid. Subscribe to our newsletter to get all the information about Angular. Sharing my data access layer along with my facade layer resulted in shared singletons throughout my app. Why are only 2 out of the 3 boosters on Falcon Heavy reused? There are three ways to specify the versions of shared libraries. Connect and share knowledge within a single location that is structured and easy to search. This hint will allow webpack to include the provided and fallback module directly instead of fetching the library via an asynchronous request. A later section here addresses this. It is possible to nest a container. If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? In my previous post .css-q395r8{transition-property:var(--chakra-transition-property-common);transition-duration:var(--chakra-transition-duration-fast);transition-timing-function:var(--chakra-transition-easing-ease-out);cursor:pointer;-webkit-text-decoration:none;text-decoration:none;outline:2px solid transparent;outline-offset:2px;color:hsl(208, 99%, 44%);}.css-q395r8:hover,.css-q395r8[data-hover]{-webkit-text-decoration:underline;text-decoration:underline;}.css-q395r8:focus,.css-q395r8[data-focus]{box-shadow:var(--chakra-shadows-outline);}Micro frontends with Module Federation and Webpack 5, we looked at how to utilise the new Module Federation plugin available with Webpack 5 (MF) to chop up a SPA into multiple, independently owned micro-frontends. Step 2 will be done during the module evaluation interleaved with other (local and remote) modules. 18. This configuration compiles and runs, but mfe1 instantiates a new GlobalService. Now, if I put eager=true it works but the library gets inside of the remoteEntry.js file which is bad as the size will increase (of course). to share layout components or formatting utilities. Best way to get consistent results when baking a purposely underbaked mud cake. Does activating the pump in a vacuum chamber produce movement of the air inside? How to help a successful high schooler who is failing in college? Make sure you've structured your shared config correctly in. Is there a trick for softening butter quickly? In this post we'll look into how we can use Module Federation to create a federated UI library to share with multiple teams. Installing a custom builder making webpack within the CLI use the generated. Common dependencies like Angular or the Auth0 library can be shared and hence don't need to be loaded several times. This is only needed when the package name can't be automatically determined from request. Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS. The Microfrontend Revolution: Module Federation with Angular, Angular Workshop Structured Introduction, 3 days or 4 days (depending on time model), Design with System: Scalable Design Systems with Storybook and Angular, Reactive Angular Architectures with RxJS and NGRX (Redux), Professional NGRX: Advanced Topics & 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, 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, Pitfalls with Module Federation and Angular, Multi-Framework and -Version Micro Frontends with Module Federation: Your 4 Steps Guide, Module Federation with Angulars Standalone Components. In the webpack.config.js, we can add the Module Federation Plugin in our plugins section. main renders modules from the remote menu and a module from the appropriate micro frontend, in this illustration subscriptions. Setup Since this post is about showcasing a component UI library, I am going to skip some of the setup boilerplate explained in my last post and walk you through what we're working with. Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? Find centralized, trusted content and collaborate around the technologies you use most. Shared Configs map.config.json contains a global object of local and remote endpoint URLs. This syntax allows you to share libraries with package name only. While this helps to quickly get a working setup, it might lead to too much shared dependencies. Just as last time we're using a monorepo for convenience and an app shell containing two routes - the base route and the ui catalog route. What is the best way to show results of a multiple-choice quiz where multiple options may be right? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Should we burninate the [variations] tag? This syntax allows you to provide additional hints to each shared package where you define the package name as the key, and the value as an object containing hints to modify sharing behavior. Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? sites contains both the consuming app and the ui library, Consumer "Home" application using the shared ui library and aliases it as, Header component example using the federated, "concurrently \"wsrun --parallel start\"", "rm -fr node_modules sites/**/node_modules && yarn run clean:dist", "ui@http://localhost:5000/remoteEntry.js", "ui@http://localhost:3001/remoteEntry.js", Showcases all available UI components by exposing micro-frontend called. For example, you have to ensure that the components that are only loaded at runtime and that were not yet known when compiling also interact as desired. In my project I have some library aliases like the following, To make this work in my webpack config. It only contains stuff to control module federation. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I am basing my work on Manfred Steyer's Module Federation Plugin Example repo, which uses Angular CLI. This article brings Angular into play and shows how to create an Angular-based microfrontend shell using the router to lazy load a separately compiled, and deployed microfrontend. Case Studies A Blog Utilizing This Websites Modules Make a wide rectangle out of T-Pipes without loops, Replacing outdoor electrical box at end of conduit, What does puncturing in cryptography mean. I can't figure out how to share a singleton service from a shared local Angular library between my two apps. When webpack goes to bundle the code it needs to be able to find it. However, when dealing with it, several additional questions come in mind: Our free eBook (about 100 pages) covers all these questions and more: The implementation of microfrontends has so far involved numerous tricks and workarounds. This is probably an argument for keeping minimal shared state/dependencies across your apps. https://github.com/webpack/webpack/issues/15164. The version of the provided module. Since Angular 14.2, it's possible to use Standalone Components as Angular Elements. Most importantly, Webpack 5 has a new feature, Module Federation, which allows multiple webpack builds to work together. Webpack Module Federation Unsatisfied version 11.x.x of shared singleton module @angular/common (required ^7.2.0) 2 Module federation display a blank page for a few seconds when a remote is unavailable Furthermore, if you're on NX, your linting will complain if you import from absolute or relative library paths, so there is a disconnect between what Webpack wants, and what nx/tslint wants. Why is proving something is NP-complete useful, and where can I use it? Why is SQL Server setup recommending MAXDOP 8 here? That solved the issues I was having with Webpack being unable to find modules at compile time. The setup is rather straightforward and enables dynamic imports from other micro frontends in runtime. In this post we'll look into how we can use Module Federation to create a federated UI library to share with multiple teams. The reason for this duplication is that Module Federation generates a bundle per shared library per consumer. Asking for help, clarification, or responding to other answers. Asking for help, clarification, or responding to other answers. This prevents several issues. How to generate a horizontal histogram with words? This syntax provides you more control over each shared library in which you can define package name as the key and version (semver) as the value. This is often known as Micro-Frontends, but is not limited to that. I didn't think to share the data access services because they are stateless, but this caused my MFEs to instantiate new singletons. Workshop with strategies for your large and long-lasting business applications. To learn more, see our tips on writing great answers. I don't know how it would find files that are not local to the project that is being built, unless you included it as an NPM package or something. All of this was done by the @angular-architects/module-federation plugin. 2022 Moderator Election Q&A Question Collection, Could not find module "@angular-devkit/build-angular", WP5 Module Federation: Singleton instantiated multiple times, Webpack Module Federation Unsatisfied version 11.x.x of shared singleton module @angular/common (required ^7.2.0), Module federation display a blank page for a few seconds when a remote is unavailable. Is cycling an aerobic or anaerobic exercise? The package @angular-architects/module-federation provides such a custom builder. Making statements based on opinion; back them up with references or personal experience. The Angular team has adapted the HttpClient for the new standalone components. Webpack loads it at runtime to get all the information needed for interacting with the microfrontend. It has routes defined within in the AppModule: In order to make it possible to load the FlightsModule into the shell, we also need to expose it via the remotes webpack configuration: The configuration shown here exposes the FlightsModule under the public name Module. Array syntax This syntax allows you to share libraries with package name only. I prefer women who cook good food, who speak three languages, and who go mountain hiking - what if it is a woman who only has one of the attributes? There are three ways to specify the versions of shared libraries. Take a look at the above Webpack configuration files for each project. I can't figure out how to share the same instance of an injectable service across federated Angular modules in a CLI project. If you're using path aliases in your tsconfig, you are used to importing local libraries like "@common/my-lib", but you can't share modules by alias in your webpack config. While its obvious that the project shell contains the code for the shell, mfe1 stands for Micro Frontend 1. The setting requiredVersion: 'auto' is a little extra provided by the @angular-architects/module-federation plugin. However, as the CLI shields webpack from us, we need a custom builder. I have setup a project with module federation: As you can see each micro-frontend has the angular core shared (along with other libs). However, this approach also puts more responsibility on the developers. Array syntax This syntax allows you to share libraries with package name only. I hereby agree that software architect can process my email address for the purpose of sending the newsletter. First of, lets look at the remote and the exposes properties of the UI team top to bottom: BaseStyles - e.g styles for wrapping a page, base fonts etc Components/Utils - a react specific prop sanitation utility. Connect and share knowledge within a single location that is structured and easy to search. It either compiles and runs and creates two instances, or it fails to compile citing a missing module depending on how i mess up my configuration I'm sure. Short story about skydiving while on a time dilation drug. Webpack 5 Module Federation aims to solve the sharing of modules in a distributed system, by shipping those critical shared pieces as macro or as micro as you would like. I'm using (at the moment) Angular 11.0.0-next and Webpack 5, which is only available as an opt-in with ng11 at the time of writing. Is a planet-sized magnet a good interstellar weapon? Assigning a new port for ng serve so that several projects can be served simultaneously. both app.component.ts files are identical. To improve performance, libraries can be shared and strategies for dealing with incompatible versions can be configured. Hence, we need to move the bootstrap logic into a new bootstrap.ts and import it via a dynamic import in the main.ts. Shared library in module federation: how to provide it? In my previous article, Ive shown how to use Module Federation which is part of webpack beginning with version 5 to implement microfrontends. This is a typical pattern when using Module Federation. This is a part of our architecture which we're not completely sure scales well. This must be because the shared services had 'unshared' dependencies. This can be done in the generated webpack.config.js: The remotes section maps the path mfe1 to the separately compiled microfrontend or to be more precise: to its remote entry. How do I simplify/combine these two methods for finding the smallest and largest int in an array? If we skipped strictVersion or set it to false, webpack would only emit a warning at runtime. Module Federation is a Webpack 5 super power plugin which offers an improved approach to micro frontends in both developer experience and application performance. Its just a virtual path pointing to another project. The provided module that should be placed in the shared scope. (The value for this hint defaults to the property name.). The overhead to maintain "shared component libraries" and sync versions and experiences across micro-frontends is also greatly reduced. On this occasion,. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Laberweinting area. He studied part-time IT and IT marketing in Graz and part-time computer science in Hagen and completed a four-semester training in the field of adult education. Lets start with the shell which would also be called the host in module federation. The combination of singleton: true and strictVersion: true makes webpack emit a runtime error when the shell and the micro frontend(s) need different incompetible versions (e. g. two different major versions). These separate builds should not have dependencies between each other, so they can be developed and deployed individually. For more details on the differences/ migration to Angular 14 please see this migration guide. a quick note about @angular/material/icon share config. I'm working on a new project using Angular 11 and Webpack 5.

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