It also holds the loggedIn state. We keep you up to date with advancements in the modern web through events, podcasts, and free content. If you need help on this step, just drop a comment below. We now have to replace that injector with our DialogInjector. Open src/app/app.component.ts and replace the entire component with the following code. And finally, we are just putting everything together. Open src/app/protected/protected.component.ts and update to the following code. Now it's time to create them. Youll have a new error in the app because our code in the loadComponent method expects a component type. './guest-profile/guest-profile.component', './client-profile/client-profile.component',
. Because we are using a reference to the view in loadChildComponent, we need to make sure that the view is fully loaded before we use it. We can update what well first see when loading the application with these components. We do make this DialogRef object available in our child-component using our custom injector again, so we need to modify the appendDialogComponentToBody"-method of the DialogService again. 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. All messages have a URL, and some have additional content to display. I added text, so my template and styles look like the following. Save my name, email, and website in this browser for the next time I comment.
login Login Try logging in as a user with a different department (or change the department value for yourself in the Okta dashboard) to see the various dynamic components at work. 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 will learn how to create dynamic components and attach them to the DOM or use them in other components.
{{name}} We added a Material toolbar that displays text, along with the contents of the Profile and Menu components. Otherwise, the onOverlayClicked callback would always fire, even if we hit the dialog itself and not the overlay (the overlay is the gray area around the dialog). } This is not exactly new and exclusive to Angular 9, but now we can have components without a module, and by making them load dynamically, we get the benefits of lazy loading.
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. In the case of lazy-loaded components, you have to inject these services dynamically as well.To archive that, Angular provides an Injector, which provides the implementation to get some services loaded lazily and dynamically at runtime. The DialogComponent is now able to load a dynamic child-component. `, ` Well add a factory method to return the component type to create by matching the MessageType to the component type like the following example. Update the component code to match the code below. One way to solve this problem would be to use conditionals with the help of the ngIf structural directive. Businesses have unique and complex needs. The Clawesome component class looks like the following example, and the Pawesome and Smiley component classes should look similar. We did a lot in this tutorial and had a lot of dependencies on Material and Okta libraries. We need to add some modules for the Material components well use. Now we can start customizing based on the user information. Because this is the default configuration now, we are using AOT for this tutorial exclusively. Loading Components Dynamically in an Angular App, ` We want the dialog to live in its own module. 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. `, ` Each of the dynamic components needs the same base component interface. Oktas auth state has user info. You will see output like the following when its finished: NOTE: You can also use the Okta Admin Console to create your app. Most of the time that isn't enough though We also need a way to communicate with the dialog. A real server call should only return the messages relevant to the department of the caller. To prevent that, we need to tell angular to re-run change detection after we have added the 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. Inside of that method we call our appendDialogComponentToBody-method to open the empty dialog. Why dont second unit directors tend to become full-fledged directors? Inside of the method, we assign that type to our dynamically created DialogComponent. Youll see an error in the IDE since we havent created the input property in the Department component yet. First, we make sure were rotating through the messages sequentially by keeping track of where in the array we are, then clearing out the previous component. All we need to do now is create the ClientProfileComponent. Angular 2 lazy loaded module initializing multiple times when navigating routes? 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. Choose Single-Page App and press Enter. Basically, it is undoing the steps we did before. This way, the main bundle won't have any of them, and they will be downloaded on demand. The rotating components look a little goofy now and youll see a lot of errors in the console, but well get it fixed up soon. Now everything should compile, and you should have a working app that displays a rotating set of cute animals images to help you power through working on that task list. In addition to the URL, content contains the properties name and about. The createComponent method requires the component type, not the instance. The value of dynamic components is that the component contents change, and we can show whatever data in the component we want. Navigate to the Profile tab and press Edit. The Department component is the container for the dynamic components, and controls which component to show. For example "some value". You will do so by creating a very flexible dialog system, that demonstrates how dynamic components are used. All we have to do with that directive is to add a ViewContainerRef property. We simply return that DialogRef with the call of the DialogServices' open method. But how do we dynamically provide an object via dependency injection? Update the code and add the new line of code to pass data to the components like the code block below. That enables us to use data of the config-object in our ExampleComponent: For example, we could display the data in our template: For that to work, we also have to change the call of the open-method and pass in a config-object: Often times, it is even more important to get a result from a dialog than it is to pass data in. Log in to get started. Select the default app name, or change it as you see fit. In the inline template for ProtectedComponent, update the
element to pass in messages as an input property. For expert architectural guidance, training, or consulting in React, Angular, Vue, Web Components, GraphQL, Node, Bazel, or Polymer, visit [thisdotlabs.com]((https://www.thisdotlabs.com). Run the following command to create an Angular v13 app. 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. Open src/app/protected/protected-routing.module.ts to add a canActivate guard to the default route. Navigate to Directory > People and click the user youll log in with. The module does not have any components to use for constructor-based injection. 