Angular

How to Create Standalone Components in Angular

Published May 12, 2023

Updated Nov 22, 2023

4 min read

This article was written over 18 months ago and may contain information that is out of date. Some content may be relevant but please refer to the relevant official documentation or available resources for the latest information.

Angular has become one of the most popular frameworks to build web applications today.

One of the key features of the framework is its component-based architecture, which allows best practices like modularity and reusability. Each Angular component consists of a template, a TypeScript class and metadata.

In this blog post, we will dive deeper into standalone components, and we will explore the anatomy of an application based on them.

For the demo application, we will create a card-like component which can be used to render blog posts in a web application.

Prerequisites

You'll need to have installed the following tools in your local environment:

The latest LTS version of Node.js is recommended.
Either NPM or Yarn as a package manager.
The Angular CLI tool(Command-line interface for Angular).

Initialize the Project

Let's create a project from scratch using the Angular CLI tool:

ng new demo-angular-standalone-components --routing --prefix corp --style css --skip-tests

This command will initialize a base project using some configuration options:

--routing. It will create a routing module.
--prefix corp. It defines a prefix to be applied to the selectors for created components(corp in this case). The default value is app.
--style css. The file extension for the styling files.
--skip-tests. Disable the generation of testing files for the new project.

If you pay attention to the generated files and directories, you'll see an initial project structure including the main application module and component:

|- src/
    |- app/
        |- app.module.ts
        |- app-routing.module.ts
        |- app.component.ts

Creating Standalone Components

First, let's create the custom button to be used as part of the Card component later. Run the following command on your terminal:

ng generate component button --inline-template --standalone

It will create the files for the component. The --standalone option will generate the component as standalone.

Let's update the button.component.ts file using the content below.

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'corp-button',
  standalone: true,
  imports: [CommonModule],
  template: `
    <button class="corp-button">
      <ng-content></ng-content>
    </button>
  `,
  styleUrls: ['./button.component.css']
})
export class ButtonComponent {

}

Pay attention to this component since it's marked as standalone: true.

Starting with Angular v15: components, directives, and pipes can be marked as standalone by using the flag standalone.

When a class is marked as standalone, it does not need to be declared as part of an NgModule. Otherwise, the Angular compiler will report an error.

Also, imports can be used to reference the dependencies.

The imports property specifies the standalone component's template dependencies — those directives, components, and pipes that can be used within its template. Standalone components can import other standalone components, directives, and pipes as well as existing NgModules.

Next, let's create the following components: card-title, card-content, card-actions and card.

This can be done at once using the next commands.

ng generate component card-title --inline-template --standalone
ng generate component card-content --inline-template --standalone
ng generate component card-actions --inline-template --standalone
ng generate component card --inline-template --standalone

On card-title.component.ts file, update the content as follows:

//card-title.component.ts

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'corp-card-title',
  standalone: true,
  imports: [CommonModule],
  template: `
    <h4>
        <ng-content></ng-content>
    </h4>
  `,
  styleUrls: ['./card-title.component.css']
})
export class CardTitleComponent {

}

Next, update the card-content.component.ts file:

//card-content.component.ts

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'corp-card-content',
  standalone: true,
  imports: [CommonModule],
  template: `
    <p class="corp-card-content">
      <ng-content></ng-content>
    </p>
  `,
  styleUrls: ['./card-content.component.css']
})
export class CardContentComponent {

}

The card-actions.component.ts file should have the content below:

// card-actions.component.ts

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'corp-card-actions',
  standalone: true,
  imports: [CommonModule],
  template: `
    <div class="corp-card-actions">
      <ng-content></ng-content>
    </div>
  `,
  styleUrls: ['./card-actions.component.css']
})
export class CardActionsComponent {

}

Finally, the card.component.ts file should be defined as follows:

//card.component.ts

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'corp-card',
  standalone: true,
  imports: [CommonModule],
  template: `
    <div class="corp-card">
        <ng-content></ng-content>
    </div>
  `,
  styleUrls: ['./card.component.css']
})
export class CardComponent {

}

Using Standalone Components

Once all Standalone components are created, we can use them without the need to define an NgModule.

Let's update the app.component.ts file as follows:


// app.component.ts

import { Component } from '@angular/core';
import { ButtonComponent } from './button/button.component';
import { CardComponent } from './card/card.component';
import { CardTitleComponent } from './card-title/card-title.component';
import { CardContentComponent } from './card-content/card-content.component';
import { CardActionsComponent } from './card-actions/card-actions.component';

@Component({
  selector: 'corp-root',
  standalone: true,
  imports: [
    ButtonComponent,
    CardComponent,
    CardTitleComponent,
    CardContentComponent,
    CardActionsComponent
  ],
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'demo-angular-standalone-components';
}

Again, this Angular component is set as standalone: true and the imports section specifies the other components created as dependencies. Then, we can update the app.component.html file and use all the standalone components.

<!-- app.component.html -->

<h2>Latest Posts</h2>

<corp-card>
  <corp-card-title>Introduction to Angular</corp-card-title>
  <corp-card-content>
    Angular is a component-based framework for building scalable web applications.
  </corp-card-content>
  <corp-card-actions>
    <corp-button>View</corp-button>
  </corp-card-actions>
</corp-card>

<corp-card>
  <corp-card-title>Introduction to TypeScript</corp-card-title>
  <corp-card-content>
    TypeScript is a strongly typed programming language that builds on JavaScript, providing better tooling at any scale.
  </corp-card-content>
  <corp-card-actions>
    <corp-button>View</corp-button>
  </corp-card-actions>
</corp-card>

This may not work yet, since we need to configure the Angular application and get rid of the autogenerated module defined under the app.module.ts file.

Bootstrapping the Application

Angular provides a new API to use a standalone component as the application's root component.

Let's update the main.ts file with the following content:

// main.ts
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app/app.component';

bootstrapApplication(AppComponent);

As you can see, we have removed the previous bootstrapModule call and the bootstrapApplication function will render the standalone component as the application's root component. You can find more information about it here.

Live Demo and Source Code

Want to play around with this code? Just open the Stackblitz editor or the preview mode in fullscreen.

Conclusion

We’re now ready to use and configure the Angular components as standalone and provide a simplified way to build Angular applications from scratch. Do not forget that you can mark directives and pipes as standalone: true. If you love Angular as much as we do, you can start building today using one of our starter.dev kits or by looking at their related showcases for more examples.

This Dot is a consultancy dedicated to guiding companies through their modernization and digital transformation journeys. Specializing in replatforming, modernizing, and launching new initiatives, we stand out by taking true ownership of your engineering projects.

We love helping teams with projects that have missed their deadlines or helping keep your strategic digital initiatives on course. Check out our case studies and our clients that trust us with their engineering.

About the author(s)

Luis Aviles
Luis is a Senior Software Engineer and Google Developer Expert in Web Technologies and Angular. He is an author of online courses, technical articles, and a public speaker. He has participated in different international technology conferences, giving technical talks, workshops, and training sessions. He’s passionate about the developer community and he loves to help junior developers and professionals to improve their skills. When he’s not coding, Luis is doing photography or Astrophotography.
@luixaviles @luixaviles

Overview of the New Signal APIs in Angular

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3 mins

AngularJavaScript

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4 mins

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Apr 18, 2025

3 mins

Engineering LeadershipGitHub

Let's innovate together!

We're ready to be your trusted technical partners in your digital innovation journey.

Whether it's modernization or custom software solutions, our team of experts can guide you through best practices and how to build scalable, performant software that lasts.

How to Create Standalone Components in Angular

Prerequisites

Initialize the Project

Creating Standalone Components

Using Standalone Components

Bootstrapping the Application

Live Demo and Source Code

Conclusion

Luis Aviles

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