module federation shared library

The . The Angular team has adapted the HttpClient for the new standalone components. The property shared defines the npm packages to be shared between the shell and the microfrontend(s). 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The rest is generated by the CLI as usual. Correct handling of negative chapter numbers, next step on music theory as a guitar player, Water leaving the house when water cut off. Saving for retirement starting at 68 years old. 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 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). Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. Each project exposes code that will be consumed by others. All of this was done by the @angular-architects/module-federation plugin. Data Protectin. I see "constructed SharedService" logged on app load, then again as soon as the remote module is loaded. 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 were working with. 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. There are three ways to specify the versions of shared libraries. This hint only allows a single version of the shared module in the shared scope (disabled by default). While this helps to quickly get a working setup, it might lead to too much shared dependencies. Thanks for contributing an answer to Stack Overflow! 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. "singleton:true" shares the same instance of the shared module across your federated modules. Other than the more tradtional static imports, dynamic imports are asynchronous. The helper function share used in this generated configuration replaces the value 'auto' with the version found in your package.json. 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. react, react-dom). Why is SQL Server setup recommending MAXDOP 8 here? How can we avoid pitfalls when working with Module Federation. Why is proving something is NP-complete useful, and where can I use it? Webpack Module Federation finally provides a simple and solid solution for this. The section shared points to the libraries shared with the shell. As shared dependencies cannot be tree shaken and by default end up in separate bundles that need to be loaded, you might want to optimize this behavior by switching over from shareAll to the share helper: So far, weve seen that Module Federation is a strightforward solution for creating Micro Frontends on top of Angular. In this post we'll look into how we can use Module Federation to create a federated UI library to share with multiple teams. You may not even realize that you have two instances of a shared service at first. Important: This article is written for Angular and Angular CLI 14 and higher. Subscribe to our newsletter to get all the information about Angular. In my app I populate the MatIconRegistry with icons that every app needs. This is often known as Micro-Frontends, but is not limited to that. 2022 Moderator Election Q&A Question Collection, Angular CLI Project Missing Module Errors After Git Pull, 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), Error when adding Datepicker to a remote component in module federation, React Module Federation - Uncaught Error: Shared module is not available for eager consumption: webpack/sharing/consume/default/react/react. would this work across different repositories, where configuring the 'paths' inside of tsconfig wouldn't be able to point to a path in a repository recieving a service? Connect and share knowledge within a single location that is structured and easy to search. With Module Federation you can share not just modules, but other file types. I have a Git Repo that illustrates my problems.. This is also the key for sharing data like the current user or global filters. If you're interested in how resilience comes to play using MF - e.g What happens if the server is down? 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. shared Why are only 2 out of the 3 boosters on Falcon Heavy reused? 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? Create a new runtime chunk with the specified name. However, as the CLI shields webpack from us, we need a custom builder. How to help a successful high schooler who is failing in college? My second problem was that I was attempting to share common facades that depended on common data access services. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Laberweinting Weather Forecasts. SQL PostgreSQL add attribute from polygon to all points inside polygon but keep all points not just those that fall inside polygon. What is the best way to show results of a multiple-choice quiz where multiple options may be right? The setup is rather straightforward and enables dynamic imports from other micro frontends in runtime. Sharing my data access layer along with my facade layer resulted in shared singletons throughout my app. Module Federation is really clever when it comes to auto-detecting details and compensating for version mismatches. Common dependencies like Angular or the Auth0 library can be shared and hence don't need to be loaded several times. The consumer in this sense is the federated project (shell or Micro Frontend) or a shared library. There are no errors or anything -- things just don't work like you expect. The shell configuration has two main objectives. // there is no version check for the required version, // so it will always use the higher version found, // it will use the highest lodash version that is >= 4.17 and < 5, // it will always use the shared version, but print a warning when the shared vue is < 2.6.5 or >= 3, // it will emit a warning if the shared vue is < 2.6.5 or >= 3, // it will throw an error when the shared vue is < 2.6.5 or >= 3, // the "vue" package will be used as a provided and fallback module, // under this name the shared module will be placed in the share scope, // share scope with this name will be used, // only a single version of the shared module is allowed, // don't use shared version when version isn't valid. 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. Native Federation is a **framework- and tooling-agnostic** implementation of Module Federation. How to generate a horizontal histogram with words? I use following approach with requiredVersion: In order to see efficiency in bundle, you can turn on. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Do you have a full example you can share? Make sure any module dependencies your shared services have are also shared. The microfrontend also referred to as a remote with terms of module federation looks like an ordinary Angular application. Thanks for contributing an answer to Stack Overflow! 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. Array syntax This syntax allows you to share libraries with package name only. The setting requiredVersion: 'auto' is a little extra provided by the @angular-architects/module-federation plugin. This is a typical pattern when using Module Federation. Module Federation allows loading Micro Frontends at runtime. I'm going to note that my project is an NX Monorepo using Angular CLI. How do I simplify/combine these two methods for finding the smallest and largest int in an array? I tried to follow another example by ScriptedAlchemy, but I can't figure out how to make it work. However, it might lead to too much shared bundles. The promise of rapid delivery of performant product-based user experiences has never been more achievable through module federation. Most importantly, Webpack 5 has a new feature, Module Federation, which allows multiple webpack builds to work together. Its just a virtual path pointing to another project. 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. The next article in this series provides a solution for this: Dynamic Federation. Eg. Module Federation Sharing Library Code; . Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? Also, be careful that all provided and fallback modules will always be downloaded when this hint is enabled. This must be because the shared services had 'unshared' dependencies. The version of the provided module. It uses the router to lazy load a FlightModule: However, the path mfe1/Module which is imported here, does not exist within the shell. Not the answer you're looking for? Let's explore some of the patterns and use-cases for module federation. 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. Make sure you've structured your shared config correctly in webpack.config.ts. It looks up the used version in your package.json. Installing a custom builder making webpack within the CLI use the generated. Each webpack build can be a host, which is a container to load other builds. Short story about skydiving while on a time dilation drug. Connect and share knowledge within a single location that is structured and easy to search. It is possible to nest a container. While specifying the remote entrys URL that way is convenient for development, we need a more dynamic approach for production. I can't find any "exposes" section for libraries. Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS. To learn more, see our tips on writing great answers. LO Writer: Easiest way to put line of words into table as rows (list). More details on this can be found in another article of this series. 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). To improve performance, libraries can be shared and strategies for dealing with incompatible versions can be configured. This way, evaluation order is unaffected by converting a module from local to remote or the other way around. When you apply the same sort of diagram shown above for this app, it looks like this: . Make a wide rectangle out of T-Pipes without loops, Replacing outdoor electrical box at end of conduit, What does puncturing in cryptography mean. 18. One application can dynamically run code from another bundle or build, on the client and the server. I am basing my work on Manfred Steyer's Module Federation Plugin Example repo, which uses Angular CLI. Shared library in module federation: how to provide it? For getting started, we need to tell the CLI to use module federation when building them. This syntax allows you to share libraries with package name only. Whats New in our Module Federation Plugin 14.3? 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. This is particularly important in angular for things like global auth services. It allows webpack to replace lower matching versions, but not higher. Step 5: Add a Shared Library to Hold Module Federation Operation. 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. In my project I have some library aliases like the following, To make this work in my webpack config. For more details on the differences/ migration to Angular 14 please see this migration guide. All of this was done by the @angular-architects/module-federation plugin. In my previous article, Ive shown how to use Module Federation which is part of webpack beginning with version 5 to implement microfrontends. Where the library would be, in the first place? Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To get started, you can just "ng add" it to your projects: If you use Nx, you should npm install the library separately. There are three ways to specify the versions of shared libraries. Please note that the webpack.config.js is only a partial webpack configuration. I'm working on a new project using Angular 11 and Webpack 5. @Mike what "singleton: true" is used for ? Besides using Angular, the result looks similar as in the previous article: The loaded microfrontend is shown within the red dashed border. Hence, Module Federation can decide on the versions to use and actually load them. Hopefully not overly so, but here is a link to a repo that shows the issue. is a trainer and consultant with a focus on Angular. 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. Make sure you have a fitting version if you try out the examples outlined here! The issue of dependencies is the most important thing here, because it's harder to debug. To look up the needed meta data for this decision, Module Fedaration squeezes itself into dynamic imports like this one here. 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. Asking for help, clarification, or responding to other answers. In other words, this allows to use this shared module in the initial chunk. 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. Webpack loads it at runtime to get all the information needed for interacting with the microfrontend. 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. Module Federation is a Webpack 5 super power plugin which offers an improved approach to micro frontends in both developer experience and application performance. Should we burninate the [variations] tag? Also, the microfrontend can be used without the shell: The case study presented here assumes that both, the shell and the microfrontend are projects in the same Angular workspace. 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. . 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. That solved the issues I was having with Webpack being unable to find modules at compile time. There is active webpack bug regarding that. Find centralized, trusted content and collaborate around the technologies you use most. Does activating the pump in a vacuum chamber produce movement of the air inside? Thus, it is critical to have only one instance of the library running at a time. evaluating the module (synchronous). Low-level concepts We distinguish between . Take a look at the above Webpack configuration files for each project. 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. We have to use those aliases, but tell webpack where to find the libraries by using the import option. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Making statements based on opinion; back them up with references or personal experience. https://github.com/webpack/webpack/issues/15164. It is also interesting that the microfrontends are loaded by Webpack under the hood. Shared Configs map.config.json contains a global object of local and remote endpoint URLs. I'm using (at the moment) Angular 11.0.0-next and Webpack 5, which is only available as an opt-in with ng11 . These separate builds should not have dependencies between each other, so they can be developed and deployed individually. 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. 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. There are three ways to specify the versions of shared libraries. Make sure you've structured your shared config correctly in. The requested shared module is looked up under this key from the shared scope. 2021-12-23: Updated for Angular CLI 13.1.x Not the answer you're looking for? Case Studies A Blog Utilizing This Websites Modules So, if you run into this issue take a look at your dependencies and make sure you're sharing everything you need. 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. Found footage movie where teens get superpowers after getting struck by lightning? Is cycling an aerobic or anaerobic exercise? 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. Stack Overflow for Teams is moving to its own domain! This is the foundation of micro frontends. How to generate a horizontal histogram with words? Hence, we need to move the bootstrap logic into a new bootstrap.ts and import it via a dynamic import in the main.ts. If the shell, for instance, is using version 12.0 and one of the micro frontends is already built with version 12.1, it will decide to load the latter one. I can't figure out how to share a singleton service from a shared local Angular library between my two apps. In C, why limit || and && to evaluate to booleans? Manfred Steyer Trainer and Consultant with focus on Angular When webpack goes to bundle the code it needs to be able to find it. Would it be illegal for me to act as a Civillian Traffic Enforcer? Start by creating a new project folder with the following package.json to allow us to run our two SPAs at the same time: How to help a successful high schooler who is failing in college? . The shared library contains code and application state we want to share across the site. However, this approach also puts more responsibility on the developers. Some libraries use a global internal state (e.g. The first HomeComponent exposes a single Angular Component file while the second ShellModule exposes a module. The code you normally find in the file main.ts was moved to the bootstrap.ts file loaded here. For this property, The generated configuration uses the helper method shareAll that is basically sharing all the dependencies found in your package.json. What is the function of in ? The package @angular-architects/module-federation provides such a custom builder. A later section here addresses this. One also has to deal with possible version conflicts. I didn't think to share the data access services because they are stateless, but this caused my MFEs to instantiate new singletons. In the webpack.config.js, we can add the Module Federation Plugin in our plugins section. 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. It only contains stuff to control module federation. 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 Such cases must be avoided with conventions or at least recognized as early as possible with integration tests. To try everything out, we just need to start the shell and the microfrontend: Then, when clicking on Flights in the shell, the micro frontend is loaded: Hint: You can also use the npm script run:all the plugin installs with its ng-add and init schematics: To just start a few applications, add their names as command line arguments: Ok, that worked quite well. The reason is that Module Federation needs to decide which version of a shared library to load. Find centralized, trusted content and collaborate around the technologies you use most. 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. Check out this live module federation example on StackBlitz. Is there a trick for softening butter quickly? So this is actualy Application 1 webpack config, as it exposes the Form component, and if any other Application like Application 2 wants to consume this component, it also needs to use the Module Federation Plugin but in order to consume the component. Should we burninate the [variations] tag? The structure will be different . But have you had a look into your main.ts? Module Federation is a type of JavaScript architecture I invented and prototyped. I hereby agree that software architect can process my email address for the purpose of sending the newsletter. rev2022.11.3.43005. Array syntax This syntax allows you to share libraries with package name only. Can an autistic person with difficulty making eye contact survive in the workplace? TL;DR. Make sure any module dependencies your shared services have are also shared. Big thanks to Zack Jackson, the mastermind behind Module Federation, who helped me bypassing some pitfalls. This provided module also acts as fallback module if no shared module is found in the shared scope or version isn't valid. I'm going to note that my project is an NX Monorepo using Angular CLI. Asking for help, clarification, or responding to other answers. rev2022.11.3.43005. 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. (The value for this hint defaults to the property name.). Despite having remote and host containers initialize at runtime, you can still leverage all of Module Federation's current features (library negotiation, etc.) Is a planet-sized magnet a good interstellar weapon? It does this by pulling them out of the the build pipeline and out of your apps. Most configuration code, including Webpack configurations, can be bundled and reused as . Generally speaking, we're using this to point to code that is bundled into our app by Webpack. In order to make module federation work, we need to bootstrap the app asynchronously. What is the deepest Stockfish evaluation of the standard initial position that has ever been done? I can't figure out how to share the same instance of an injectable service across federated Angular modules in a CLI project. 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. Lets start with the shell which would also be called the host in module federation. 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. The reason is that Module Federation needs to decide which version of a shared library to load. We've also used the main federated module as a shared library for all of our applications. I might not be understanding the question tho. Singleton or modules without fallback will throw, otherwise fallback is used, // the required version of the shared module, Move common modules into the parent chunk, Passing the minChunks property a function, Combining implicit common vendor chunks and manifest file, Multiple compressed versions of assets for different algorithm. However, it can . The ScriptedAlchemy example makes it seem like I need to reference my shared library in my shared library array in the webpack.config.ts files. This configuration compiles and runs, but mfe1 instantiates a new GlobalService. Assigning a new port for ng serve so that several projects can be served simultaneously. Like always, the code for this example is at my Github in case you feel like checking that out. 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). to share layout components or formatting utilities. But, if I put eager=false, how can the code retrieve the library when needed? Where in the cochlea are frequencies below 200Hz detected? Module Federation Sharing Library Code Building & Deploying Summary Overview As discussed in the previous article, the first step in updating our architecture involved the consolidation of. What is the effect of cycling on weight loss? I'll do my best to explain my setup.. Real sorry about how long this is going to be. If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. We will be using a yarn mono-repo structure here for simplicity, but the idea behind Module Federation is to allow teams to operate autonomously, so in the real world, your SPA's would most likely live in their own repositories. 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. The above configuration shows how to expose two different files. In this training, you will learn from well-known insiders and experts from the very beginning, using many examples, how to successfully develop modern applications with. This file is where we add in the wiring for the hosts, remotes, shared code, and shared dependencies in the Module Federation plugin. The ModuleFederationPlugin allows a build to provide or consume modules with other independent builds at runtime. Module Federation Motivation Multiple separate builds should form a single application. To learn more about Module Federation, review the technology's website. I have setup a project with module federation: As you can see each micro-frontend has the angular core shared (along with other libs).

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