Standalone Component

Standalone Components in Angular

In Angular, Standalone components provide a simplified way to build Angular applications. As the name suggests, standalone components are independent and do not rely on other modules or components.

Note! Yes, standalone components are independent; they no longer depend on the @NgModule. If you try to import a standalone component into an @NgModule, you might encounter errors

Important! The Standalone components were introduced in Angular version 14. Learn more about Angular’s various versions: See more

Standalone components are suitable for small applications that do not require module dependencies. However, when developing a large or complex application with mandatory dependencies for components, this becomes a drawback for standalone components.

Important! Any existing angular applications can optionally and incrementally adopt the new standalone style without any breaking changes.

Standalone vs Non-Standalone Components

Below is a list which differentiate between standalone and non-standalone component:

Standalone	Non-Standalone
Independent: Standalone components do not depend on @NgModule.	Module Dependency: These components must be declared in an @NgModule to be used.
Simplified Structure: Ideal for creating reusable components, directives, or pipes without the need to involve Angular modules.	Complex Structure: Suitable for larger, more complex applications where components are part of a bigger module structure.
The standalone @Component directive contains standalone: true and imports: [].	The non-standalone component does not include these configurations.

How to Create a Standalone Component?

To create an standalone component in your angular application, you need to run the following command:

ng generate component component_name

In the latest version of Angular, this command will automatically create a standalone component, as the application itself supports standalone components by default.

However, in older versions of Angular, running the above command may not create a standalone component. In that case, we need to use the following command or manually set the standalone property and specify the imports.

ng generate component component_name --standalone

The standalone component initial data will look like:

import{ Component}from'@angular/core';@Component({
  selector:'app-root',
  standalone:true,
  imports:[],
  templateUrl:'./app.component.html',
  styleUrl:'./app.component.css'})exportclassAppComponent{
  title ='my-crud-app';}

Here,

• The standalone: true property identifies this component as a standalone component.
• The imports array is where you can add all the required dependencies for this component.

Verify the Standalone Components

You might be wondering how to determine if a component is standalone. To verify if a component is standalone in Angular, you can check using the following guide lines:

• Standalone Property: Check the standalone property in the component’s TypeScript file (.ts file). If the standalone property is set to true, then it’s a standalone component.

@Component({
  selector:'app-root',
  standalone:true,
  imports:[],
  templateUrl:'./app.component.html',
  styleUrl:'./app.component.css'})

Importing Standalone Component: If you try to import the standalone component into a non-standalone module, it should throw an error:

Component imports must be standalone component

Advantages of Standalone Components

Below is a list of some advantages of the Standalone components:

• Reusability: These components are self-contained, making them easy to reuse in different parts of the application without any module dependency.
• Faster Development: As there is no need to import within the modules, developers can quickly create and integrate new components, speeding up the development process.
• Modularity: The Standalone components enable a modular approach, allowing for better organization and maintainability of the codebase.