have a host which lazily loads the remote on specific route, have a remote which has its own routes which lazily load modules. The home screens for both the patient and doctor portals are shown below. Once the reference of GreetComponent is loaded, it creates the component on the view container using the createComponent method and bypassing resolveComponentFactory method in it. Ivy is a new compiler of Angular. Now, we have started the app successfully! On our team, we want to dynamically serve separate authentication experiences for customers. sayHello Based on either your previous activity on our websites or our ongoing relationship, we will keep you updated on our products, solutions, services, company news and events. Lazy loading feature allows loading components, modules, and other files of Angular application when required. Note: We could also automatically generate the routing module for the admin module using the --routing switch i.e ng generate module admin --routing --module=app. All of them have strict branding standards that aren't compatible with each other. There's other benefits to micro-frontends, including: The Angular Architects package @angular-architects/module-federation creates a simple API to request modules and pull them into your application. However it just breaks the app completely. ; so that you can independently manage slices of your application and update and deploy those changes. Awesome implementation of platform-config.json, read the article it's amazing, I will be implementing this for the dynamic mfe remoteEntry points. This helps to keep the initial bundle size small, so the initial load time is decreased. Feature toggles in an application. The function will filter the routes and set routes into the current router, and the function will be completed before the app completely starts. We're a place where coders share, stay up-to-date and grow their careers. In the above loadRoutes function, the routes are filtered by the moduleId configuration. One solution is to create separate apps as different, discrete projects for each frontend. To lazy load the component, we will use the import() method inside an async/await function. If you are looking for a great deep-dive into module federation and micro-frontends, I suggest reading: https://www.angulararchitects.io/aktuelles/the-microfrontend-revolution-module-federation-in-webpack-5/. Hence, you cannot use an await statement as we did earlier. The commands will generate a patient folder which contains the module, routing, and component files. This immediately fires a run-time error: Error: inject() must be called from an injection context. Perhaps obviously, this approach will bloat the codebase, likely cause duplication, and leave you with code that is hard to maintain.

All contents are copyright of their authors. ./Module is nomenclature you can define as you please. I acknowledge my data will be used in accordance with Progress' Privacy Policy and understand I may withdraw my consent at any time. When Shell injects Remote with loadRemoteModule lazy routing; node_modules_angular_core___ivy_ngcc___fesm2015_core_js (Angular 12.0.5 chunk from Remote) JS file is added from Remote. What if my remote module is routable? One of the many benefits of micro frontends and module federation, is that you can pull in different frameworks, versions, etc. The newly created app contains a default app module and a default entry component. The "app-routing.module" contains all the routes required in the application. __|- sub-feature1.module.ts Templates let you quickly answer FAQs or store snippets for re-use. I am a full-stack developer. All Rights Reserved. For example, if we created a single application for front-end and back-end office, then both the module files are get loaded even front-end office user get logged-in. The build output will be copied into the dist folder, ready for publishing to the webhost. We can now change our config while serving the different remotes and shell and see it swap out the served bundle. When the host loads the remote, the remote's sub-route gets loaded in the host's router-outlet, without running the remote's app.component.ts (nothing runs from the remote's app.component.ts and the content of app.component.html is not rendered). The previous major version of Angular, 9, came with a lot of amazing features, and one of the most talked-about among them is theIvy renderer. To allow our shell app to have it's own built-in routes as well as the dynamic runtime routes, we use a factory to concat rootRoutes and the dynamicRoutes (from our injection token PLATFORM_ROUTES). The Angular creates SPA (Single Page Application), so all the components, modules, and other files are compiled in a single file and loaded at once. The APP_INITIALIZER token represents a factory function loadRoutes. You can also. Under the hood, all router modules roll-up the route definition to an injection token named ROUTES. For example, when the doctor portal is deployed and run, only the doctor module will be loaded. Open the src/app/admin/admin.module.ts file and import the exported admin routing module as follows: Next, add it to the imports array of the admin module: That's all we need to set up lazy-loaded modules in Angular 10/9. See Trademarks for appropriate markings. Node.js installed locally, which you can do by following, ng generate module shop --route shop --module app.module. To build the app in production mode, we run the following command. We do however, want all customers to share the primary functionality of our platform - content management and learning delivery. To create a new component, we can use the following CLI command: Using the above CLI commands, we can set up our project structure as below. I can locally develop on localhost:6000, having an accurate test bed for my application and live-dev against the changes with ease. You can also use service workers, DOM events and other messaging-based solutions to pass the needed context you would otherwise be using a token for. Thank you for the reply it saved me a lot of time, I will just add on to your answer for more clarity for those in the future who will face this problem. Now when you click the button, you will lazy load the GreetComponent inside the parent component. The above command creates "feature-module-example" folder that is new lazy-loadable feature module "feature-module-example.module.ts". Now enhanced with: This article explains various ways of lazy loading a component in Angular, including via an import statement inside an async-await function and via the then method. You can also ask us not to pass your Personal Information to third parties here: Do Not Sell My Info.

{{greetMessage}}

Step 3: Create Demo component inside the "feature-module-example". In this article, you will learn about Lazy Loading in Angular. Once unpublished, this post will become invisible to the public To build and run the two portals separately, we rely on the environment configuration. Let's assume you have the following mono-repo: Shell is your consuming application. Not ideal. The source code for the example project, including the CSS style files we mentioned earlier, can be found on my GitHub. Using this, Angular comes to know that thisis additional routes that need to load with feature module. You can now locally run your shell and remote with: -o will automatically launch the apps in your default browser. The gist of the code below is: The menu service is injected into the menu component. He is the author of the best-selling book on Angular, Angular Essential. In Angular 10 and previous versions till Angular 8, the syntax for lazy-loading modules has changed and it's now more aligned with the standard browser's API. Thanks for reading it. For example, you can pass data and handle an event of GreetComponent in the parent component as shown in the next code listing: As you see, you can use instance to access the properties and events of the lazy-loaded component. Step 2: Create feature module "FeatureModuleExample". There's a great walkthrough of this in the link at the top of this article. The lazy loaded module is not referenced to the application root module so, we need to use browser's built-in import ('') syntax for dynamic imports. Angular 12 recently launched with the added enhancements of Webpack 5 and opening the door to using module federation. You will import modules and providers to establish a foundation to locally test your remote app in isolation. Basically i know i will have to try it and seek the answers just wanted to know your experience using cdns and is there any references which helped you out, it would be great if you can point me towards it. Once the service is initialized, we populate the menu items. Using the following code, we can add navigation to the app.component.html to load demo component. The CLI adds RouterModule.forChild(routes) to feature routing modules. In this scenario you can use promises then method to lazy load a component as shown in the next code listing: In the above function, everything is the same. Shell shared configured with @angular/* singleton: true Find him on Twitter or GitHub. If you read this far I appreciate it. 2022 C# Corner. Subscribe to our Angular newsletter and get our hands-on Angular book for free! Once they login to the application, they only need branding for their corporate logo and primary brand color; they can use all the existing interfaces. `, Angular Basics: Tips for Structuring Your Angular Project, Angular Basics: Working With Enums in Angular, Configuring the Kendo UI for Angular Rich Text Editor. It's promise-based and gives you access to the module, from where the module's class can be called. So I ended up adding this to the route module code: Specifically I added multi:true but now I get the following error: Error: NG0200: Circular dependency in DI detected for InjectionToken ROUTES. In a real environment, the config data would come from an endpoint. Prior to bootstrapping Angular, we need to request the registry of the modules that should exist for this user. Made with love and Ruby on Rails. As shown in the above example app, each portal picks their own feature modules and lazy-loads them. We need to feed the routes to the Angular Router using the forChild() method instead of the forRoot() module. How to Migrate (P2V) Physical to a Virtual Data Center - Convergence VMware Virtualization Concepts, Onion Architecture In ASP.NET Core 6 Web API, Getting Started With Angular Electron Application Development, JWT Token Authentication In Angular 14 And .NET Core 6 Web API, Why SharePoint Framework (SPFx) Is Best for SharePoint Development, Types Of Cloud Computing In VMware Virtualization Concepts. This is fine if our application is small and has limited functionality but for the large application, this will increase the initial load time for the application. The AppModule of your remote app should be your "demo" or self-deployed landscape. That routing should be inside the MFE, and I'm not able to navigate there correctly from the Shell? The AppModule should have a separate module of the cohesive functionality you are wanting to expose, i.e: LoginModule. To make these apps compatible with module federation, you will need to run the schematic on their projects: You can configure the port to be whatever you desire. This work is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License. We can add a new module using the following CLI command. I am using Angular 12.0.10. All of the top resources available for module federation show statically referencing the modules in your shell app's route definition. In bootstrap.ts we will consume this asset and build the injection token value: By passing the providers to platformBrowserDynamic, we are setting a static provider value prior to bootstrap, that can be used on bootstrap. Then, we created feature modules. The parent component is a component in which GreetComponent will be loaded dynamically.

Once unsuspended, seanperkins will be able to comment and publish posts again. Sometimes a lazy-loaded component relies on other modules. The ViewContainerRef represents a container where one or more views can be attached. By exposing feature.module.ts in your remote's webpack config, you should be able to something similar to this in your shell/root's app routing module: This should lazy-load your remote app's feature module contents when navigating to /feature-path and then defer to that module's structure for further nested lazy loading. You have the right to request deletion of your Personal Information at any time. When building an enterprise Angular app, we often need to develop a few different frontends to serve different user types or channels. The dynamic import API is a standard browser's API introduced in modern browers. Since import() returns a promise, its possible to use async/await instead of the then-based callback style. Go ahead and create a admin/admin-routing.module.ts file and add the following code: We create the routes to the various components of our admin module and we include these routes in the admin routing module. To target each frontend portal, well create a different environment file for them. I don't see any circular dependencies visually inspecting the code. The unnecessary modules might get loaded as well. It is recommended to not use lazy loaded module if it is visited frequently by the user. To apply different styles for each app, we create the following scss files: In the Angular.json file, the styles are mapped to different builds. I've done something similar where my shell loads different authentication experiences under the /authentication namespace and certain auth experiences have further lazy loading for forgot password & user registration screens. I would recommend being more specific in a diverse system. We can bootstrap the module and immediately provide a new value on-top for the ROUTES value. Micro frontends and more importantly module federation, allows developers the flexibility of remotely requesting a module on the network and bootstrapping that module into their application. When we create the application the root route file (app-routing.module.ts), the CLI adds RouterModule.forRoot(routes) to the AppRoutingModule imports array. : your LoginModule has routing to go to a 2FA view or a ForgotMyPassword view? As a contrived example, we are going to build an e-health app with two frontends: As shown in the below diagram, the two portals expose different features, but are built on the same framework and share some common functionality. So with my project setup like the article describes I got an error when the application loaded about can't mix multi-providers and regular providers. For further actions, you may consider blocking this person and/or reporting abuse. While the example schematic will generate the exposes section with the AppModule and AppComponent I would strongly advise against this. Now that the foundation of module federation have been set, let's jump into dynamically swapping modules at runtime.

Greetings

By using await syntax, it loads the component asynchronously. Thanks for any help you might be able to provide! As a wrap-up, we've seen how to use the loadChildren property of a route in the Angular Router and the standard compliant dynamic import syntax to lazy load an example admin module. Before we start, make sure your local environment has the following tools installed: Using the following Angular CLI command, we can create a new app skeleton. Next, in the constructor of the parent component inject ViewContainerRef and ComponentFactoryResolver classes: As of the official documentation, ComponentFactoryResolver class is a simple registry that maps components to generated ComponentFactory classes that can be used to create an instance of the component using the create() method. After configuring the route to lazy-load your feature module, you'll next need to add routing to the various components of the admin module which needs to have its own routes seprated from the main routing module that resides in the src/app/app-routing.module.ts file. Hey, dev peeps: DevReach is back, face-to-face, and in Boston! It does not contain HTML and code for feature module and demo component. Updated on June 30, 2021, DigitalOcean Kubernetes: new control plane is faster and free, enable HA for 99.95% uptime SLA, Step 3 Setting Route Configuration in the Feature Module, How to Install Node.js and Create a Local Development Environment, the official documentation for more information on lazy loading. The Remote; is lazy loaded successfully, loaded on but Remote module is rendered from the single @angular/core instance from Shell. This design results in better performance because each app wont load the modules that are not required. Unfortunately I hit the wall with this approach (exposing the app.module.ts and app.component.ts). In the previous step, we generated the default app module, which is the entry point of the app. The same menu component will load and filter the menu items dynamically. The handshake for dependencies should also be the same, since it's evaluated at runtime against the generated bundles (independent of anything mono-repo specific). Telerik and Kendo UI are part of Progress product portfolio. He is the founder of geek97, which trains developers on various technologies so that they can be job-ready, and organizes India's largest Angular Conference, ng-India. I'd be cautious with doing this over major versions; as you're pulling in the remote app into the context of the host. Want to master Angular 14? Both environment files will reside under the environment folder, and well use the moduleId to differentiate the patient and doctor portals. With you every step of your journey. Progress is the leading provider of application development and digital experience technologies. One for Host and a different version for Remotes? If your two Angular applications are using Angular Elements, you may need to share the PlatformRef between these (via the window global). I found the problem. He is a published author, a well-known speaker, a Google Developer Expert, and a 10-time winner of the Microsoft MVP Award. _ |- feature2.module.ts. You can lazily load a component in any other component, hence creating a parent-child relationship between them.