Support for custom element providers in angular 17 | Angular v17 new features

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👉Angular v17 new features | What's New in #Angular17

Support for custom element providers in Angular 17 allows you to provide custom elements to your Angular components. This makes it easier to inject custom element dependencies into your Angular components.

To provide a custom element to an Angular component, you need to use the providers property of the component's metadata. The providers property takes an array of providers, which can be any of the following:

Class types
Service providers
Custom element providers

Here is an example of how to provide a custom element to an Angular component:

import { Component, OnInit, providers } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
  providers: [
    // Provide the MyCustomElement custom element
    provide(MyCustomElement, { useClass: MyCustomElement })
  ]
})
export class AppComponent implements OnInit {

  constructor(private myCustomElement: MyCustomElement) {}

  ngOnInit() {
    // Do something with the MyCustomElement custom element
  }
}

In this example, the MyCustomElement custom element is provided to the AppComponent component. This means that the AppComponent component can inject the MyCustomElement custom element into its constructor and use it in its code.

You can also use custom element providers to provide custom elements to your Angular components that are lazy loaded. To do this, you need to use the provideIn property of the custom element provider. The provideIn property takes the name of the module in which the custom element should be provided.

Here is an example of how to provide a custom element to an Angular component that is lazy loaded:

import { Component, OnInit, providers } from '@angular/core';

@Component({
  selector: 'my-lazy-loaded-component',
  templateUrl: './my-lazy-loaded-component.html',
  styleUrls: ['./my-lazy-loaded-component.css'],
  providers: [
    // Provide the MyCustomElement custom element to the lazy loaded component
    provide(MyCustomElement, { useClass: MyCustomElement, provideIn: 'my-lazy-loaded-module' })
  ]
})
export class MyLazyLoadedComponent implements OnInit {

  constructor(private myCustomElement: MyCustomElement) {}

  ngOnInit() {
    // Do something with the MyCustomElement custom element
  }
}

In this example, the MyCustomElement custom element is provided to the MyLazyLoadedComponent component, which is lazy loaded in the my-lazy-loaded-module module. This means that the MyLazyLoadedComponent component can inject the MyCustomElement custom element into its constructor and use it in its code.

Support for custom element providers in Angular 17 is a powerful new feature that makes it easier to inject custom element dependencies into your Angular components. This can make your Angular code more modular and reusable.

Here are some additional benefits of using custom element providers in Angular 17:

It can make your Angular code more modular and reusable.
It can make it easier to test your Angular components.
It can make your Angular applications more flexible and extensible.

If you are building Angular applications, I encourage you to consider using custom element providers. It is a powerful feature that can improve the modularity, reusability, testability, and flexibility of your applications.