SDK: Angular Library

The @dotcms/angular SDK is the DotCMS official Angular library. It empowers Angular developers to build powerful, editable websites and applications in no time.

Prerequisites & Setup#

---

Get a dotCMS Environment#

Version Compatibility#

• Recommended: dotCMS Evergreen
• Minimum: dotCMS v25.05
• Best Experience: Latest Evergreen release

Environment Setup#

For Production Use:

• ☁️ Cloud hosting options - managed solutions with SLA
• 🛠️ Self-hosted options - deploy on your infrastructure

For Testing & Development:

• 🧑🏻‍💻 dotCMS demo site - perfect for trying out the SDK
• 📘 Learn how to use the demo site
• 📝 Read-only access, ideal for building proof-of-concepts

For Local Development:

• 🐳 Docker setup guide
• 💻 Local installation guide

Configure The Universal Visual Editor App#

For a step-by-step guide on setting up the Universal Visual Editor, check out our easy-to-follow instructions and get started in no time!

Create a dotCMS API Key#

[!TIP] Make sure your API Token has read-only permissions for Pages, Folders, Assets, and Content. Using a key with minimal permissions follows security best practices.

This integration requires an API Key with read-only permissions for security best practices:

1. Go to the dotCMS admin panel.
2. Click on System > Users.
3. Select the user you want to create the API Key for.
4. Go to API Access Key and generate a new key.

For detailed instructions, please refer to the dotCMS API Documentation - Read-only token.

Installation#

npm install @dotcms/angular@next 

This will automatically install the required dependencies:

• @dotcms/uve: Enables interaction with the Universal Visual Editor for real-time content editing
• @dotcms/client: Provides the core client functionality for fetching and managing dotCMS data

Configuration#

---

The recommended way to configure the DotCMS client in your Angular application is to use the provideDotCMSClient function in your app.config.ts:

import { ApplicationConfig } from '@angular/core';
import { provideDotCMSClient } from '@dotcms/angular';
import { environment } from './environments/environment'; // Assuming your environment variables are here

export const appConfig: ApplicationConfig = {
  providers: [
    provideDotCMSClient({
      dotcmsUrl: environment.dotcmsUrl,
      authToken: environment.authToken,
      siteId: environment.siteId
    })
  ]
};

Then, you can inject the DotCMSClient into your components or services:

import { Component, inject } from '@angular/core';
import { DotCMSClient } from '@dotcms/angular';

@Component({
  selector: 'app-my-component',
  template: `<!-- Your component template -->`
})
export class MyComponent {
  dotcmsClient = inject(DotCMSClient);

  ngOnInit() {
    this.dotcmsClient.page
        .get({ url: '/about-us' })
        .then(({ pageAsset }) => {
            console.log(pageAsset);
        });
  }
}

Proxy Configuration for Static Assets#

Configure a proxy to leverage the powerful dotCMS image API, allowing you to resize and serve optimized images efficiently. This enhances application performance and improves user experience, making it a strategic enhancement for your project.

1. Create a Proxy Configuration#

Create a proxy.conf.json file in your project:

// proxy.conf.json
{
    "/dA": {
        "target": "http://localhost:8080", // Your dotCMS instance URL
        "secure": false, // Set to true if using HTTPS
        "changeOrigin": true // Required for hosting scenarios
    }
}

2. Update Angular Configuration#

Add the proxy configuration to your angular.json:

// angular.json
{
    "projects": {
        "my-app": {
            "architect": {
                "serve": {
                    "builder": "@angular-devkit/build-angular:dev-server",
                    "options": {
                        "proxyConfig": "src/proxy.conf.json"
                    }
                }
            }
        }
    }
}

3. Usage in Components#

Once configured, image URLs in your components will automatically be proxied to your dotCMS instance:

📚 Learn more about Image Resizing and Processing in dotCMS with Angular.

// /components/my-dotcms-image.component.ts
@Component({
    template: `
        <img [src]="'/dA/' + contentlet.inode" alt="Asset from dotCMS" />
    `
})
class MyDotCMSImageComponent {
    @Input() contentlet: DotCMSBasicContentlet;
}

Using dotCMS Images with Angular's NgOptimizedImage Directive (Recommended)#

To optimize images served from dotCMS in your Angular app, we recommend using the built-in NgOptimizedImage directive. This integration supports automatic image preloading, lazy loading, and improved performance.

We provide a helper function provideDotCMSImageLoader() to configure image loading with your dotCMS instance.

Setup#

Add the image loader to your app.config.ts:

// src/app/app.config.ts
import { provideDotCMSImageLoader } from '@dotcms/angular';
import { ApplicationConfig } from '@angular/core';

export const appConfig: ApplicationConfig = {
  providers: [
    provideDotCMSImageLoader(environment.dotcmsUrl)
  ]
};

Usage#

Once configured, you can use the NgOptimizedImage directive to render dotCMS images:

// src/components/my-dotcms-image.component.ts
@Component({
  selector: 'my-dotcms-image',
  template: `
    <img [ngSrc]="imagePath" alt="Asset from dotCMS" />
  `,
  standalone: true
})
export class MyDotCMSImageComponent {
  @Input() contentlet!: DotCMSBasicContentlet;

  get imagePath() {
    return this.contentlet.image.versionPath;
  }
}

📚 Learn more about NgOptimizedImage

Quickstart: Render a Page with dotCMS#

---

The following example demonstrates how to quickly set up a basic dotCMS page renderer in your Angular application. This example shows how to:

• Create a standalone component that renders a dotCMS page
• Set up dynamic component loading for different content types
• Handle both regular page viewing and editor mode
• Subscribe to real-time page updates when in the Universal Visual Editor

// /src/app/pages/dotcms-page.component.ts
import { Component, signal } from '@angular/core';

import { DotCMSLayoutBody, DotCMSEditablePageService} from '@dotcms/angular/next';
import { getUVEState } from '@dotcms/uve';
import { DotCMSPageAsset } from '@dotcms/types';

import { DOTCMS_CLIENT_TOKEN } from './app.config';

const DYNAMIC_COMPONENTS = {
    Blog: import('./blog.component').then(c => c.BlogComponent),
    Product: import('./product.component').then(c => c.ProductComponent)
};

@Component({
    selector: 'app-pages',
    standalone: true,
    imports: [DotCMSLayoutBody],
    providers: [DotCMSEditablePageService, DOTCMS_CLIENT_TOKEN],
    template: `
        @if (pageAsset()) {
            <dotcms-layout-body
                [pageAsset]="pageAsset"
                [components]="components()"
            />
        } @else {
            <div>Loading...</div>
        }
    `
})
export class PagesComponent {
    private readonly dotCMSClient: DotCMSClient = inject(DOTCMS_CLIENT_TOKEN);
    private readonly editablePageService = inject(DotCMSEditablePageService);
    readonly components = signal(DYNAMIC_COMPONENTS);
    readonly pageAsset = signal<DotCMSPageAsset | null>(null);

    ngOnInit() {
        this.dotCMSClient.page
            .get({ url: '/my-page' })
            .then(({ pageAsset }) => {
                if(getUVEState()) {
                   this.#subscribeToPageUpdates(response);
                   return;
               }

                this.pageAsset.set(pageAsset);
            });
    }

    #subscribeToPageUpdates(response: DotCMSPageResponse) {
        this.editablePageService
            .listen(response)
            .subscribe({ pageAsset } => this.pageAsset.set(pageAsset));
    }
}

Example Project 🚀#

Looking to get started quickly? We've got you covered! Our Angular starter project is the perfect launchpad for your dotCMS + Angular journey. This production-ready template demonstrates everything you need:

📦 Fetch and render dotCMS pages with best practices 🧩 Register and manage components for different content types 🔍 Listing pages with search functionality 📝 Detail pages for blogs 📈 Image and assets optimization for better performance ✨ Enable seamless editing via the Universal Visual Editor (UVE) ⚡️ Leverage Angular's dependency injection and signals for optimal performance

[!TIP] This starter project is more than just an example, it follows all our best practices. We highly recommend using it as the base for your next dotCMS + Angular project!

SDK Reference#

---

All components, directives, and services should be imported from @dotcms/angular/next.

DotCMSLayoutBody#

DotCMSLayoutBody is a component used to render the layout for a DotCMS page, supporting both production and development modes.

Usage#

import { Component, signal } from '@angular/core';
import { DotCMSPageAsset } from '@dotcms/types';
import { DotCMSLayoutBody } from '@dotcms/angular/next';

import { DOTCMS_CLIENT_TOKEN } from './app.config';

@Component({
    template: `
        <dotcms-layout-body [page]="pageAsset()" [components]="components()" mode="development" />
    `
})
export class MyPageComponent {
    protected readonly components = signal({
        Blog: import('./blog.component').then((c) => c.BlogComponent)
    });
    protected readonly pageAsset = signal<DotCMSPageAsset | null>(null);
    private readonly dotCMSClient = inject(DOTCMS_CLIENT_TOKEN);

    ngOnInit() {
        this.dotCMSClient.page.get({ url: '/my-page' }).then(({ pageAsset }) => {
            this.pageAsset.set(pageAsset);
        });
    }
}

Layout Body Modes#

• production: Performance-optimized mode that only renders content with explicitly mapped components, leaving unmapped content empty.
• development: Debug-friendly mode that renders default components for unmapped content types and provides visual indicators and console logs for empty containers and missing mappings.

Component Mapping#

The DotCMSLayoutBody component uses a components input to map content type variable names to Angular components. This allows you to render different components for different content types. Example:

const DYNAMIC_COMPONENTS = {
    Blog: import('./blog.component').then((c) => c.BlogComponent),
    Product: import('./product.component').then((c) => c.ProductComponent)
};

• Keys (e.g., Blog, Product): Match your content type variable names in dotCMS
• Values: Dynamic imports of your Angular components that render each content type
• Supports lazy loading through dynamic imports
• Components must be standalone or declared in a module

[!TIP] Always use the exact content type variable name from dotCMS as the key. You can find this in the Content Types section of your dotCMS admin panel.

DotCMSEditableText#

DotCMSEditableText is a component for inline editing of text fields in dotCMS, supporting plain text, text area, and WYSIWYG fields.

Usage#

import { Component, Input } from '@angular/core';
import { RouterLink } from '@angular/router';

import { DotCMSBasicContentlet } from '@dotcms/types';
import { DotCMSEditableTextComponent } from '@dotcms/angular/next';

@Component({
    selector: 'app-your-component',
    imports: [RouterLink, NgOptimizedImage, DotCMSEditableTextComponent],
    template: `
        <div
            class="flex overflow-hidden relative justify-center items-center w-full h-96 bg-gray-200">
            <img
                class="object-cover w-full"
                [src]="'/dA/' + contentlet().inode"
                [alt]="contentlet().title" />
            <div
                class="flex absolute inset-0 flex-col justify-center items-center p-4 text-center text-white">
                <h2 class="mb-2 text-6xl font-bold text-shadow">
                    <dotcms-editable-text fieldName="title" [contentlet]="contentlet()" />
                </h2>
                <a
                    class="p-4 text-xl bg-red-400 rounded-sm transition duration-300 hover:bg-red-500"
                    [routerLink]="contentlet().link">
                    See more
                </a>
            </div>
        </div>
    `
})
export class MyBannerComponent {
    @Input() contentlet: DotCMSBasicContentlet;
}

Editor Integration#

• Detects UVE edit mode and enables inline TinyMCE editing
• Triggers a Save workflow action on blur without needing full content dialog.

DotCMSBlockEditorRenderer#

DotCMSBlockEditorRenderer is a component for rendering Block Editor content from dotCMS with support for custom block renderers.

Usage#

import { DotCMSBasicContentlet } from '@dotcms/types';
import { DotCMSBlockEditorRenderer } from '@dotcms/angular/next';

const CUSTOM_RENDERERS = {
    customBlock: import('./custom-block.component').then((c) => c.CustomBlockComponent),
    h1: import('./custom-h1.component').then((c) => c.CustomH1Component)
};

@Component({
    selector: 'app-your-component',
    imports: [DotCMSShowWhen],
    template: `
        <dotcms-block-editor-renderer
            [blocks]="contentlet.myBlockEditorField"
            [customRenderers]="customRenderers()" />
    `
})
export class MyBannerComponent {
    @Input() contentlet: DotCMSBasicContentlet;
    readonly customRenderers = signal(CUSTOM_RENDERERS);
}

Recommendations#

• Should not be used with DotCMSEditableText
• Take into account the CSS cascade can affect the look and feel of your blocks.
• DotCMSBlockEditorRenderer only works with Block Editor fields. For other fields, use DotCMSEditableText.

📘 For advanced examples, customization options, and best practices, refer to the DotCMSBlockEditorRenderer README.

DotCMSShowWhen#

DotCMSShowWhen is a directive for conditionally showing content based on the current UVE mode. Useful for mode-based behaviors outside of render logic.

Usage#

import { UVE_MODE } from '@dotcms/types';
import { DotCMSShowWhen } from '@dotcms/angular/next';

@Component({
    selector: 'app-your-component',
    imports: [DotCMSShowWhen],
    template: `
        <div *dotCMSShowWhen="UVE_MODE.EDIT">Only visible in edit mode</div>
    `
})
export class YourComponent {}

📚 Learn more about the UVE_MODE enum in the dotCMS UVE Package Documentation.

DotCMSEditablePageService#

The DotCMSEditablePageService enables real-time page updates when using the Universal Visual Editor. It provides a single method listen that returns an Observable of page changes.

Service Lifecycle & Operations#

When you use the listen method, the service:

1. Initializes the UVE with your page data
2. Sets up communication channels with the editor
3. Tracks content changes in real-time
4. Updates your page automatically when:
   • Content is edited inline
   • Blocks are added or removed
   • Layout changes are made
   • Components are moved
5. Cleans up all listeners and connections on destroy

Usage#

import { Subscription } from 'rxjs';
import { Component, OnDestroy, OnInit, signal, inject } from '@angular/core';

import { getUVEState } from '@dotcms/uve';
import { DotCMSPageAsset } from '@dotcms/types';
import { DotCMSLayoutBody, DotCMSEditablePageService } from '@dotcms/angular/next';
import { DOTCMS_CLIENT_TOKEN } from './app.config';

@Component({
    imports: [DotCMSLayoutBody],
    providers: [DotCMSEditablePageService],
    template: `
        @if (pageAsset()) {
            <dotcms-layout-body [page]="pageAsset()" [components]="components()" />
        } @else {
            <div>Loading...</div>
        }
    `
})
export class PageComponent implements OnInit, OnDestroy {
    private subscription?: Subscription;
    private readonly dotCMSClient = inject(DOTCMS_CLIENT_TOKEN);
    private readonly editablePageService = inject(DotCMSEditablePageService);
    readonly pageAsset = signal<DotCMSPageAsset | null>(null);

    ngOnInit() {
        this.dotCMSClient.page.get({ url: '/about-us' }).then((pageResponse) => {
            // Only subscribe to changes when in the editor
            if (getUVEState()) {
                this.subscription = this.editablePageService
                    .listen(pageResponse)
                    .subscribe(({ pageAsset }) => {
                        this.pageAsset.set(pageAsset);
                    });
            } else {
                const { pageAsset } = pageResponse;
                this.pageAsset.set(pageAsset);
            }
        });
    }

    ngOnDestroy() {
        this.subscription?.unsubscribe();
    }
}

Troubleshooting#

---

Common Issues & Solutions#

Universal Visual Editor (UVE)#

1. UVE Not Loading: Page loads but UVE controls are not visible
   • Possible Causes:
     • Incorrect UVE configuration
     • Missing API token permissions
     • Missing the DotCMSEditablePageService call to enable UVE.
   • Solutions:
     • Verify UVE app configuration in dotCMS admin
     • Check API token has edit permissions
     • Ensure dotcmsUrl matches your instance URL exactly

Missing Content#

1. Components Not Rendering: Empty spaces where content should appear

   • Possible Causes:
     • Missing component mappings
     • Incorrect content type variable names
   • Solutions:
     • Check component registration in components prop
     • Verify content type variable names match exactly
     • Enable development mode for detailed logging

2. Asset Loading Issues: Images or files not loading

   • Possible Causes:
     • Proxy configuration issues
     • CORS restrictions
   • Solutions:
     • Verify proxy settings in angular.json
     • Check network tab for CORS errors
     • Ensure /dA path is properly configured

Development Setup#

1. Build Errors: npm install fails

   • Solutions:
     • Clear npm cache: npm cache clean --force
     • Delete node_modules and reinstall
     • Verify Node.js version compatibility

2. Runtime Errors: Console errors about missing imports or components not rendering

   • Solutions:
     • Check all imports are from @dotcms/angular/next
     • Verify all peer dependencies are installed
     • Update to latest compatible versions

Debugging Tips#

1. Enable Development Mode

   <dotcms-layout-body
       [page]="pageAsset()"
       [components]="components()"
       mode="development"
   />

   This will:

   • Show detailed error messages
   • Highlight unmapped components
   • Log component lifecycle events

2. Check Browser Console

   • Check for errors in the browser console
   • Check for errors in the browser network tab

3. Network Monitoring

   • Use browser dev tools to monitor API calls
   • Check for 401/403 errors (auth issues)
   • Verify asset loading paths

Still Having Issues?#

If you're still experiencing problems after trying these solutions:

1. Search existing GitHub issues
2. Ask questions on the community forum to engage with other users.
3. Create a new issue with:
   • Detailed reproduction steps
   • Environment information
   • Error messages
   • Code samples

dotCMS Support#

---

We offer multiple channels to get help with the dotCMS Angular SDK:

• GitHub Issues: For bug reports and feature requests, please open an issue in the GitHub repository.
• Community Forum: Join our community discussions to ask questions and share solutions.
• Stack Overflow: Use the tag dotcms-angular when posting questions.
• Enterprise Support: Enterprise customers can access premium support through the dotCMS Support Portal.

When reporting issues, please include:

• SDK version you're using
• Angular version
• Minimal reproduction steps
• Expected vs. actual behavior

How To Contribute#

---

GitHub pull requests are the preferred method to contribute code to dotCMS. We welcome contributions to the DotCMS UVE SDK! If you'd like to contribute, please follow these steps:

1. Fork the repository dotCMS/core
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Please ensure your code follows the existing style and includes appropriate tests.

Licensing Information#

---

dotCMS comes in multiple editions and as such is dual-licensed. The dotCMS Community Edition is licensed under the GPL 3.0 and is freely available for download, customization, and deployment for use within organizations of all stripes. dotCMS Enterprise Editions (EE) adds several enterprise features and is available via a supported, indemnified commercial license from dotCMS. For the differences between the editions, see the feature page.

This SDK is part of dotCMS's dual-licensed platform (GPL 3.0 for Community, commercial license for Enterprise).

Learn more at dotcms.com.