`, ` And finally, we are just putting everything together. I looked into InjectionToken as another option but it wants a generic definition which again requires import of the LazyService. This way, the main bundle won't have any of them, and they will be downloaded on demand. For example, angular material is using this object to define the size of the dialog.

Welcome! Notice its also available through a claim. Do you want to have the job done? The ViewContainerRef is a pointer to an element in which we are going to insert the newly instantiated component. Lets talk through the loadComponent method in a little more detail. We simply request the DilaogRef via dependency injection in the constructor and then use it to close it when a button triggers the "onClose"-method. Update the component to the following. Press the Add Claim button to create a new claim. This promise, once resolved, returns a Component. We could use Angular Component Development Kit (CDK) Portals instead since it has extra helper functionality, but lets take the updated API out for a spin. So we need to modify that, as well. Because we have separate components specifically designed to handle each message type, we keep the logic very straightforward. When we created the dynamic components earlier, they all implemented the same base interface, DynamicComponent. We simply return that DialogRef with the call of the DialogServices' open method. Inside of there, we define a new property called _additionalTokens, which will hold our additional classes for DI. We use the ViewChild decorator on the Dynamic directive to access where to insert the component. . We have three dynamically created components to display content: Clawesome, Pawesome, and Smiley. The ComponentLoader is a simple interface. To dynamically load the component, we use the directive as an anchor and create the component into its position in the DOM. Let's start with the template src/app/profile/client-profile/client-profile.component.html. To do that, we simply add a ng-template and add the attribute "appInsertion" of our directive. Also, the "appendDialogComponentToBody" now has to take a DialogConfig as a parameter, as well as the open method. Angular is creating a factory for each component when building. Feel free to remove the OnInit lifecycle hook too. She is a Google Developer Expert in Angular and organizes coding workshops and community events locally and internationally. For the ProtectedComponents template, well use Materials List component. We can do this in the Okta dashboard. We can that subscribe to that observable and get notified once the dialog closed. The dynamic components are cool, but they dont do anything yet. The data always includes an URL plus other content that is unique to each component. A custom injector is just a TypeScript class that implements the Injector interface. A real server call should only return the messages relevant to the department of the caller. h2 { text-align: center; } In the inline template for ProtectedComponent, update the element to pass in messages as an input property. "Selected/commanded," "indicated," what's the third word? That means, that it is not used in any angular template. At the end, we will come up with a dialog system that is quite similar to the one provided by angular material. Because this is all about dynamic components.

The Clawesome component class looks like the following example, and the Pawesome and Smiley component classes should look similar. } To make it easier, I decided to work on a use case that I know. The module does not have any components to use for constructor-based injection. We did a lot in this tutorial and had a lot of dependencies on Material and Okta libraries. It holds a loadChildren function that returns a Promise. Well access the claim through the ID token from Oktas auth state subject. In order to make the loading of the components easier, we are going to create a directive that will help with that. Well handle this within the service by creating a mapping for message types by the department. Next, we will use the custom injector to register our config-object. We then trigger change detection, once our dynamic child-component is loaded.

`, ` Run the following command to create the interface. Data Imbalance: what would be an ideal number(ratio) of newly added class's data? Also, the component has to know which type of component it will has to create later. Angular has the mechanics to load components at runtime so you can dynamically display content. The interface is empty now, but well add members later. Add the departmentMapping property and update the constructor for the service as shown below. Well label the department names as either 1 or 2 for ease of coding. Well put all the code in the same folder by running the following code. Each of the dynamic components needs the same base component interface. Inside of the method, we assign that type to our dynamically created DialogComponent. In our case, the base component interface is the DynamicComponent interface. Just think of loading captcha, promotion, or advertisement components. It looks like this: Let's say that we have this application, with which users can log in and perform some actions. Because of the broad use of the word "dynamic", one could think that you could "dynamically" load just any component from the internet at runtime. Name your claim department, always include it in the ID Token, and set its value to user.profile.department. If you want to check out your work by running the application, youll need to manually type in the route for the Protected module as part of the URL. You will need them in the following steps. Again, we are using the angular-cli to do this: Inside of the service class, we create a new method called "appendDialogComponentToBody". Off-topic comments may be removed. Dynamic means, that the components location in the application is not defined at buildtime. Importing a Component from a lazy-loaded Module into another lazy-loaded Module, Angular, exposing components in lazy-loaded module, Seperating page components from feature components in lazy-loaded module, Angular 6 display components of a lazy loaded module, Angular Material dialog in lazy loaded module, Angular - Lazy loaded module cannot be loaded. To test this, we import our DialogModule into the AppModule: We can then use the DialogService to open a dialog with our ExampleComponent: Great! We save your email address, your name and your profile picture on our servers when you sing in. The Okta CLI will create an OIDC Single-Page App in your Okta Org. If you are using a Developer Account, youll have one named default. If you take a look at src/app/profile/profile.service.ts, you'll notice I'm referencing a GuestProfileComponent, and a ClientProfileComponent. Once you've created it, open it in your editor src/app/app.service.ts and paste this: At first glance, you see ComponentFactoryResolver, ViewContainerRef, ComponentLoader, and think: It's simpler than you think. We will create a class called DialogRef which has a property called afterClosed which is an observable. We need a service that emulates a server response to return messages. Your email address will not be published. The dynamically and manually created component can be destroyed using the stored component reference. This component will consist of a white dialog area, while the rest of the screen is blurred. For the actual logging in, open src/app/menu/menu.component.ts to add a menu with login and logout buttons. First, well update the template and styles. flex-direction: column; This allows us to have a different layout for each. To generate a new project, make sure you have the angular-cli installed and use this command at the desired project destination: When the tool is done, we should be good to go. To change that, we need to modify our dialog to instantiate dynamic components and place them in itself. The value of dynamic components is that the component contents change, and we can show whatever data in the component we want. Of course, our DialogComponent does not know what to do with that type, yet. To get a reference to that insertion-directive in our component class, we add a @ViewChild decorated property called insertion point. Now, let's create another service named ProfileService that will use the AppService to load the respective component. Let's do something different this time. First, go to the src/styles.scss, and include this: To make the styling easier, I created a folder style inside the assets folder, in which I have 2 scss files: They hold all the shared styles, to make everything easier to maintain: I also created a folder images, and included an image named profile.png. The Department component is the container for the dynamic components, and controls which component to show. Now we can start customizing based on the user information. Her background is primarily working on enterprise software platforms, and she is a fan of all things TypeScript and JavaScript. In this tutorial, you will learn what dynamic components are and how they work in angular. Theres a base interface for all dynamically created components that contains component data named DynamicComponent. Before we start, make sure you have installed the Angular CLI v9. Assume an existing Angular application or at least a component (AppComponent) needs to be extended by an existing component (DynamicComponent), which should be loaded lazy, async at runtime. The Android documentation was not helpful and all the various tutorials I found on Medium and similar sites were not applicable. This Dot Labs is a modern web consultancy focused on helping companies realize their digital transformation efforts. margin-top: 2rem; display: flex; Also, you will discover how to provide objects to these dynamic components using dependency injection and custom angular injectors. Every user has unique needs, meaning that they will only use a subset of all the available components. forum. Here is the code from the component doing the lazy load of the service. I eventually found an approach and it appears to be working around Angular deficiencies rather than being a basic Angular capability. Also, we need to request the CompoentFactoryResolver to our constructor. } Once we have the factory, we can use it to create an instance of our DialogComponent. .toolbar { display: flex; justify-content: space-between; } So why don't we create a component to test that real quick? In addition to the URL, content contains the properties name and about. Open srcs/app/app.module.ts and create an OktaAuth instance by adding the following before the NgModule and replacing the placeholders with the Issuer and Client ID from earlier. Also, we assign the componentRef to our property. Once you have the right version of the Angular CLI installed, follow these steps: Let's start with the loading of components. To get started, let's create an empty dialog component. I am attempting to access an instance of a service from a lazy loaded module from within a component. Open src/app/protected/protected.component.ts and update to the following code. Therell be three different message formats, one for each dynamic component. Please check out this commit to see the changes required to run tests and create mocks of the Okta services. But how do we dynamically provide an object via dependency injection? Youll have a new error in the app because our code in the loadComponent method expects a component type. Copy the following class code and replace your DepartmentComponent class code. Was there a Russian safe haven city for politicians and scientists? Each component is a Material card control with an image to display. Remember that now both users have to download the entire component and actions, whether or not they use them. The problem is that including LazyService in the current component will defeat the purpose of lazy loading and the get() method seems to want a type only creating a chicken in egg problem for this approach. In your default Authorization Server, navigate to the Claims tab. We will learn how to create dynamic components and attach them to the DOM or use them in other components. I would recommend adding a RaspberryPi 3 Read more, This post describes how to implement lazy or dynamic module loading with angular, based on anAngular 10 demo implementation, and is an extension to the former post I created on lazy-loading components and services. Update the inline template and styles code to look like the following. Even though were in a guarded route, well still add the safety measures to verify the user authentication, and to return a default value if the claim isnt on the ID token for some reason. We created a Subject to manage the isLoggedIn state, and two methods to many events into the subject. Ok, maybe we would have to add an @Input to toggle it on and off, but that would not be an issue, right? The result of the dialog can then be received by subscribing to the afterClosed-observable of the DialogRef when openeing the dilaog itself: In this tutorial, you have learned how you can utilize dynamic components to create a flexible and reusable dialog system. Well use some Okta-provided code to log in, log out, and identify the authenticated state. How should we do boxplots with small samples? If you need help on this step, just drop a comment below. Open the src/app/protected/department/dynamic.component.ts file and rename the interface from Dynamic to DynamicComponent to help us better keep track of what the interface provides. We added a Material toolbar that displays text, along with the contents of the Profile and Menu components. You can reach us directly at developers@okta.com or you can also ask us on the `, ` rev2022.7.21.42635. We covered a lot in this post, tried out a new API, and explored some cool concepts. In Read more, During the 3rd Corona Lockdown in Austria, I searched for a new private project and decided to test something new. Then, I'm mapping this component into a factory, and finally I will inject the component, and return the instance. Well be blazing through some basics to focus on working through the dynamic components and user profile information. Doesn't that sound crazy? One way to solve this problem would be to use conditionals with the help of the ngIf structural directive. Could a license that allows later versions impose obligations or remove protections for licensors in the future? This article will show you how to start loading components dynamically using Angular 9 with Ivy. Open src/app/protected/department/department.component.ts. Now it's time to create them. You maybe have used it already, as this is exactly the same approach as the guys from angular material are using for their dialog component. Open the new project in your editor of choice. You can find the code for this project on GitHub. But before we can do that, we need to define a class that describes that object. Lets add the code to see how flexible dynamic components are. To get the factory of our DialogComponent we can use the ComponentFactoryResolver provided by angular. Update the code and add the new line of code to pass data to the components like the code block below. This service is using the type of the component to look up the factory. Then, using the mergeMap operator, I call the loadComponent function that is doing the real magic. If you already have an account, run okta login.

My tasks

The toolbar now displays your name, and youll see a rotation of dynamically created components based on a user claim from your ID token. It also holds the loggedIn state. The default view in this module shows ProtectedComponent, which displays a task list and the DepartmentComponent dynamic component loader. To do that, we define a public method called "open". When we add authentication, well automatically route to it. If you liked this article, please share it with your friends! To learn more, see our tips on writing great answers. The Department component HTML template contains an ng-template element with a helper directive to identify where to add the dynamic component to the view. Afterward, we need to attach the new component to the angular component tree (which is separate from the DOM). What happens if I accidentally ground the output of an LDO regulator? Also, we want our component to live in the HTML-body to make sure that the dialog always fills the whole screen. Next, well create a new module, Protected, to hold the view guarded by authentication. Using the from function from rxjs, I'm able to transform the promise into an observable. The MessageService returns messages the company wants to display to its users. Loading Components Dynamically in an Angular App, ` You now have a directory named dynamic-components with a working application skeleton. Angular v13 included updates to the ViewContainerRef API to make working with dynamic components more straightforward. Open src/app/message.ts and replace the contents with the following code. Clears the ViewContainerRef, emptying it entirely.

My favorite work app

The ID token now contains the new claim with the value of the users department. We can use the Okta-provided Angular SDK to connect to the OIDC client quickly. Identifying a novel about floating islands, dragons, airships and a mysterious machine. We pass it the type of our DialogConfig together with the actual config-object. To learn, visit thisdot.co. This Dot Labs proudly partners with enterprises interested in transforming their digital assets, upskilling their teams, and finding novel avenues for advanced integration. I want to clarify, I have used the ngIf strategy in applications that have been in production for years. We'll need the same files from the GuestProfileComponent. Because this is the default configuration now, we are using AOT for this tutorial exclusively. Youll see an error in the IDE since we havent created the input property in the Department component yet. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Inside of there, we define a class called "DialogInjector". The main flow for the application is after initially launching a welcome page; youll log in using Okta from a button in the toolbar and redirect to the guarded content. It will also add a trusted origin for http://localhost:4200. Notice, that the component does implement the AfterViewInit and OnDestroy interfaces, as we will the hooks later. Well add a factory method to return the component type to create by matching the MessageType to the component type like the following example. We also need a way to remove the component once the dialog is closed. In this post, I describe how to set up your own Home Assistant with hassio.Before getting started you have to find an appropriate Hardware Environment to deploy hassio. The interface now looks like the following. The goal of this article is to explore a possible solution for addressing it. Start by opening src/app/protected/department/clawesome.component.ts. `, ` We can pass in the parameters for routing, creating the default component, and lazy-loading, by running the following command. You can probably see where this is going. Next, lets get into this exciting dynamic component loading part! Asking for help, clarification, or responding to other answers. We also want to guard the Protected component route to authenticated users. Also, make sure that the dialog component is declared in the dialog module instead of the app module. All the messages have data to display. Can anyone explain how lazy service loading is supposed to be done? Announcing the Stacks Editor Beta release! Replace the hardcoded private messages property into a public input property like the code snippet below. The DialogComponent is now able to load a dynamic child-component. 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 do that, create a new file called "dialog-config" inside of the dialog directory. We then use this type to resolve the factory for this component.

SMILE!