Creating Custom Elements in Angular

2.1 What are Custom Elements?

Custom elements are a part of the Web Components standard that allows developers to create reusable components with their own HTML tags.

2.2 Angular Elements

Angular elements are Angular components packaged as custom elements. This allows you to use Angular components in non-Angular applications.

3.1 Setting Up Your Angular Project

Start by creating a new Angular project or use an existing one.

ng new custom-element-demo

3.2 Installing Angular Elements

Install the necessary packages for Angular Elements.

npm install @angular/elements --save

3.3 Creating a Custom Element

Follow these steps to create a custom element:

1. Generate a new component.

ng generate component my-element

2. Modify the component to include the necessary logic.
3. Register the component as a custom element.

import { createCustomElement } from '@angular/elements';

const el = createCustomElement(MyElementComponent, { injector });

4. Define the custom element.

customElements.define('my-element', el);

4.1 Keep Components Simple

Ensure your components are focused on a single responsibility to maintain reusability and simplicity.

4.2 Use Input Properties

Utilize Angular's @Input decorators to pass data to your custom elements effectively.

4.3 Handle Events Correctly

Use custom events to communicate between your custom elements and the parent application.