Inspect the content nodes beneath /content/wknd-spa-angular/us/en/home/jcr:content/root/responsivegrid to find the Card component content. In this case the Text tab will be inserted before the asset tab. View your bookmarks after completing your profile. To ultimately expose the values from the component dialog to the Angular component we need to update the Sling Model that populates the JSON for the Card component. uncaught typeerror invariant invalid

Update the Asset Metadata tab to add values for Alternative Text and Caption. Optionally, start the webpack dev server from a new terminal window to see the changes in real-time: Open card.component.ts at ui.frontend/src/app/components/card/card.component.ts. Run ng e2e to execute the end-to-end tests via Protractor. Beneath the card folder, open the file _cq_dialog/.content.xml. In the IDE of your choice open the ui.apps module. View your awards after completing your profile. umamahesh versioning The @PostConstruct initModel() will always be called when the Sling Model is initialized, therefore it is a good opportunity to initialize objects that may be used by other methods in the model. The property sling:resourceSuperType points to wknd-spa-angular/components/image indicating that the Card component will inherit all of the functionality from the WKND SPA Image component. For example, for dropdown elements that have a generic contract, the dropdown behavior of those "codes-dropdown" elements can be configured. I would have thought that a person merits a sufficiently different UI from a branch, but for the sake of the argument assume they conform to a common interface (e.g. Review the required tooling and instructions for setting up a local development environment. To make full use of the Sling Resource Merger it is important to know the original dialog node structure for the Image component dialog. I've inherited from a base component before and provided a desktop vs mobile child component. These variables will be used to implement the additional methods for the Card.java interface. Use the --prod flag for a production build. Content Projection is what you want to look into.

Run ng generate component component-name to generate a new component. Add the following methods to the interface: These methods will be exposed via the JSON model API and passed to the Angular component. Look at ng-content in the angular docs. Navigate to http://localhost:4502/editor.html/content/wknd-spa-angular/us/en/home.html. If using AEM 6.x add the classic profile. To use the above directive in the HTML template we need to add the codes attribute to the p-dropdown element. The package can be installed using AEMs Package Manager. I wish to create one component that can be inherited and used by other components. sql throw error catch server typescript angular try exception handling div deep If that does not fit your needs, you may need to use template outlets. Understanding how to extend an existing component is a powerful technique to customize and expand the capabilities of an AEM SPA Editor implementation. Add the additional @Input annotations to capture the new model: Add methods for checking if the Call to Action is ready and for returning a date/time string based on the cardLastModified input: Open card.component.html and add the following markup to display the title, call to action and last modified date: Sass rules have already been added at card.component.scss to style the title, call to action and last modified date. This file is the Component Dialog definition for the Card component. You signed in with another tab or window. If you're looking for AngularJS or Angular 1 related information, check out r/AngularJS. Open CardImpl.java. The directive provides a solid base that applies to all date picker elements. you in advance. This will initialize the cardPage variable, which will be used by the other new methods to return data about the underlying linked page. are there any good guides on how to do repetitive stuff ? We could accomplish the same result with wrapper components and with components that have a rich set of configuration options but this requires more code and is harder to maintain. But how do we go from 14 lines of HTML to just one line (this is how prettier formats it)? Understand the basic of Component Inheritance with the use of, Return the last modified date of the page specified by. Next, implement the initModel() method to initiate a private variable cardPage based on the value of cardPath. The getPage method takes in a path and returns an AEM Page object or null if the path doesnt point to a valid page. Also known as the Proxy pattern Sling resource inheritance is a powerful design pattern for allowing child components to inherit functionality and extend/override behavior when desired. In Edit mode, add the Card component to the Layout Container: Drag and drop an image from the Asset finder onto the Card component: Open the Card component dialog and notice the addition of a Text Tab. This project was generated with Angular CLI version 8.3.18. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module. The answer is a directive. The above annotation will instantiate an Image object named image based on the sling:resourceSuperType inheritance of the Card component. The @ValueMapValue annotation is used to automatically perform the mapping. In short, it has an impact on the developers, and on the users. Run ng serve for a dev server. Extend an existing Core Component with additional properties and content. The Image interface already extends the ComponentExporter interface which allows the Sling Model to be exported as JSON and mapped by the SPA editor. Create and abstract class, put the common logic there and extend that class in your components. Currently no additional changes appear after updating the dialog. Here is a great article on advanced content projection patterns. Open a terminal window and deploy just the updates to the core module using the Maven autoInstallBundle profile from the core directory. The directive also includes an @Output emitter when the countries are loaded. When extending the Image component it is important that the resource type matches the component itself. Instead of using the codes attribute to mark the codes dropdown, we assume that it's the default behavior but use the resetDropdown attribute to opt-out of the behavior. Open the file Card.java at core/src/main/java/com/adobe/aem/guides/wknd/spa/angular/core/models/Card.java. To see the initial Card component an update to the Template policy is needed. Many development teams strive to be D.R.Y. Run ng test to execute the unit tests via Karma. We can do more in the directive's implementation. I appreciate it if you would support me if have you enjoyed this post and found it useful, thank Angular directives are underused and I think this is because we don't know what they're capable of. Press J to jump to the feed. The answer to that question is probably no, and it could be that you've resorted to components instead of directives because these are more familiar.

If you ask me this is a lot of code that doesn't only pollute the template but also deceives us into thinking that things are more complex than they are.

In this sample a new tab has been added to the dialog to capture additional data from an author to populate the Card Component. And then the base constructor has to receive the values using the super keyword instead of using DI. With this initial Card implementation review the functionality in the AEM SPA Editor. CardImpl.java also uses the Delegation pattern for Sling Models to avoid rewriting all of the logic from the Image core component. Then just make a generic component class MyListItem. To get more help on the Angular CLI use ng help or go check out the Angular CLI README. How to extend components in Angular to reuse functionality. Deploy the starter code to a local instance of AEM, if you havent already: Navigate to the SPA Page Template at http://localhost:4502/editor.html/conf/wknd-spa-angular/settings/wcm/templates/spa-page-template/structure.html. These are expected JSON values from the AEM component that will be mapped to the Angular component. We also have the opportunity to implement two pieces of business logic: Return to the IDE of your choice and open the core module. If you're using Angular you probably are familiar with the popular structural directives *ngIf and *ngFor, but does your codebase contain custom directives? This indicates that the WKND SPA Image component inherits all of the functionality from the Core Component Image. Learn how to extend an existing Core Component to be used with the AEM SPA Editor. Instead of a directive that changes the behavior of all elements, we modify the selector to target specific elements that have a distinct use case. Return to the IDE and open the ui.frontend module. Copyright 2022 Adobe. Review the node: Most components do not require a cq:editConfig, the Image and child descendents of the Image component are exceptions. Directives are what the Open-Closed Principle is about. Properties like sling:orderBefore allow a developer to choose where to insert new tabs or form fields. have a name: string field) and the UI just displays the name.

I can also forget (or I don't know that I have) to add an attribute to a new date picker, and this creates another experience for the user. An initial Card Component has been provided by the chapter starter code. . Update the Layout Containers policy to add the new Card component as an allowed component: Save the changes to the policy, and observe the Card component as an allowed component: Next, author the Card component using the AEM SPA Editor. If using Sling inheritance, its possible to use features of the Sling Resource Merger to override or extend portions of the dialog. Inspect the starting point for the Card implementation. For example, with directives, we can change the behavior of 3rd party libraries or an in-house component library without having access to the code of the component. (dont repeat yourself). I find this an elegant solution in comparison to creating wrapper components.

The Calendar instance is injected into the directive and is be configured to our needs. In this blog post, I want to show you a useful technique that uses directives to configure 3rd party components in a unified way. It is then possible to simply use the image object to implement methods defined by the Image interface, without having to write the logic ourselves. Navigate to http://localhost:4200/. Now that the JSON model is populated with new properties for ctaLinkURL, ctaText, cardTitle and cardLastModified we can update the Angular component to display these. It is always recommended to use Core Components directly when possible. Enter the following values on the Text tab: Card Path - choose a page beneath the SPA homepage. In this example we have chose to re-use the existing Angular Image component app-image by simply passing the @Input parameters from card.component.ts. You can view the finished Angular card component code here. This implementation has already ben partially stubbed out to accelerate the tutorial. This way only the p-dropdown elements that have the codes attribute are configured by the above directive. View the JSON model response at: http://localhost:4502/content/wknd-spa-angular/us/en.model.json and search for the wknd-spa-angular/components/card: Notice the JSON model is updated with additional key/value pairs after updating the methods in the CardImpl Sling Model. Another option is to use the :not() selector for elements that in most of the cases require the same config, but in some rare cases require a one-off configuration. Review the three @Input parameters in the class for src, alt, and title. You don't necessarily need 4 wrapper components, you can manage conditionally in the smart component. To expose the new fields to the Angular Component we need to update the Sling Model for the Card component. You can always view the finished code on GitHub or check the code out locally by switching to the branch Angular/extend-component-solution. Beneath the card folder, open the file _cq_editConfig.xml. You can certainly use class inheritance in angular, but there are better ways of doing this. Here we see a directive that populates a dropdown with data, which is useful for data sources that are often used. The pageManager is one of a number of Java backed global objects made available to Sling Models via the @ScriptVariable annotation. I did on 10 modules already thats so boring. In the example below, the navigator options are disabled by explicitly setting their values to false. The app will automatically reload if you change any of the source files. To target elements that require a different configuration, we can leverage selectors and target the specific elements. Sling inheritance makes this possible with AEM. Content specific to Angular. In the IDE switch to the ui.frontend module, navigating to ui.frontend/src/app/components/card: The component has already been stubbed out to map to the AEM Card Component using the standard MapTo function. Open a new tab and navigate to CRXDE-Lite. Lastly, when the component removes, changes, or adds an attribute I could potentially have to change all the p-datepicker elements in my codebase. In a real-world implementation it may be more appropriate to simply use the Teaser Component then extending the Image Core Component to make a Card component depending on project requirements. Sling inheritance supports multiple levels of inheritance, so ultimately the new Card component inherits functionality of the Core Component Image. The Card component will extend the Image Core Component adding additional content fields like a Title and a Call To Action button to perform the role of a teaser for other content within the SPA. The images provided by WKND reference site will be re-used on the WKND SPA. Get title from linked page - check the checkbox to indicate true. I just learn angular, and start doing a project with it.I did repetitive copy and paste on the component that looks similiar like component for displaying list-of-person, list-of-branches, list-of-clients etc. This technique is used for getSrc(), getAlt() and getTitle(). When we refactor the code by using a directive, the template becomes simple again, and we're sure that we always provide the same experience to the user. you can create a dumb component that handles just the display logic and accepts the data as input.

For example, let's say that 90% of the dropdown elements in our application have a data source with "codes". This directive can be used together with the other dropdown directives. But I found no article/ guide / tutorial to do that. All Rights Reserved. Observe that the Card interface currently extends com.adobe.cq.wcm.core.components.models.Image and therefore inherits all of the methods of the Image interface. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Therefore we do not need to explicitly extend ComponentExporter interface like we did in the Custom Component chapter. This is the implementation of Card.java interface. But for those one-off cases, it's possible to overwrite the predefined values of the directive for elements that require a different configuration. Observe that properties cardPath, ctaText, titleFromPage are persisted by the dialog. Run ng build to build the project. Angular Directives are great, but sadly underused. Extend a Component | Getting Started with the AEM SPA Editor and Angular, 2 - Defining Event Content Fragment Models, 6 - Exposing the Content on AEM Publish for Delivery, 7 - Consuming AEM Content Services from a Mobile App, http://localhost:4502/editor.html/conf/wknd-spa-angular/settings/wcm/templates/spa-page-template/structure.html, http://localhost:4502/editor.html/content/wknd-spa-angular/us/en/home.html, http://localhost:4502/content/wknd-spa-angular/us/en.model.json. Navigate to ui.apps/src/main/content/jcr_root/apps/wknd-spa-angular/components/card and view the .content.xml file. Because directives can be stacked we can limit the responsibility of the directive so that it only does one thing. The build artifacts will be stored in the dist/ directory. Press question mark to learn the rest of the keyboard shortcuts. The directive uses the p-calender component selector to be applied to all calendar elements. then create smart-compnoent wrappers around that dumb component that handles how or what data is loaded. Implement the additional methods defined in the Card.java interface: You can view the finished CardImpl.java here. This file dictates the drag and drop behavior in the AEM authoring UI. In the example below, we add a [countries] attribute so that we can bind the directive to specific dropdowns to use a list of countries as the data source. A variation of this example is to make the data source configurable. In this chapter a new Card component will be created. In this case, we don't want to be required to add the codes attribute to those directives, instead, we want to define when we don't want to use the directive for the remaining 10%. This is the markup required to configure the component the way we want it to behave. On my current project we're using the component library from PrimeNG and I've seen the following code repeatedly, for every date picker. Later in the tutorial additional properties will be added and displayed. Notice the added attribute [codes] of the selector only target codes dropdown elements. Inspect the file ui.apps/src/main/content/jcr_root/apps/wknd-spa-angular/components/image/.content.xml: Notice that the sling:resourceSuperType points to core/wcm/components/image/v2/image. Review the global variables already mapped to the JCR properties saved the author dialog. Download the starting point for this tutorial via Git: Deploy the code base to a local AEM instance using Maven: If using AEM 6.x add the classic profile: Install the finished package for the traditional WKND reference site. Notice the use of the @Model and @Exporter annotations to ensure the Sling Model is able to be serialized as JSON via the Sling Model Exporter.

Deploy the full changes to AEM from the root of the project using Maven: Navigate to http://localhost:4502/editor.html/content/wknd-spa-angular/us/en/home.html to see the updated component: You should be able to re-author the existing content to create a page similar to the following: Congratulations, you learned how to extend an AEM component using the and how Sling Models and dialogs work with the JSON model. The component is closed for modifications, but a directive allows you to extend the component without changing the internals. In the HTML template, this translates to the following. They are similiar one to another, but the data that need to be displayed are different. I don't know of any tutorials, but basically I just created the base component like I would any other component, then the children just implements this base.