Function AttributeChanged

Creates a component method amendment (and decorator) for custom element attribute change callback.

Example:

@Component('my-component')
class MyComponent {

  @AttributeChanged('my-attribute')
  myAttributeChanged(newValue: string, oldValue: string | null) {
    console.log(`my-attribute value changed from ${oldValue} to ${newValue}`);
  }

}

Returns

New component method amendment.