import { ESLBaseElement } from '../../../esl-base-element/core' ; import { ESLCarousel } from '../core/esl-carousel' ; /**
 *  ESLCarousel Plugin base class.
 * The ESL Carousel Plugin should have the dom representation so it's extends  ESLBaseElement * Use the attributes to path the plugin options, the same as with any custom elements.
  export abstract class ESLCarouselPlugin extends ESLBaseElement { /**
     * Marker to define the restriction for the plugin placement.
     * If freePlacement is false - plugin element should be child of ESLCarousel element.
     * If freePlacement is true - plugin can be placed anywhere inside of carousel.
     */ public static freePlacement = false ; returns protected findCarouselOwner ( ) { if ( ( this . constructor as typeof ESLCarouselPlugin ) . freePlacement ) { return this . closest ( ESLCarousel . is ) ; } else { return this . parentNode as ESLCarousel ; } } private _carousel ? : ESLCarousel ; returns public get key ( ) { return this . nodeName . toLowerCase ( ) ; } returns public get carousel ( ) : ESLCarousel { return this . _carousel ! ; } protected connectedCallback ( ) { const carousel = this . findCarouselOwner ( ) ; if ( carousel instanceof ESLCarousel ) { this . _carousel = carousel ; this . _carousel . _addPlugin ( this ) ; } else { throw new Error ( 'Invalid esl-carousel-plugin placement: plugin element should be placed under the esl-carousel node' ) ; } } protected disconnectedCallback ( ) { if ( this . carousel ) { this . carousel . _removePlugin ( this ) ; delete this . _carousel ; } } /**
     * Define the plugin bind lifecycle hook.
     * Unlike  connectedCallback , bind is called by owner ESL Carousel when the plugin can be attached.
      public abstract bind ( ) ; /**
     * Define the plugin unbind lifecycle hook.
     * Unlike  disconnectedCallback , unbind is called by owner ESL Carousel when the plugin should be detached.
      public abstract unbind ( ) ; public static register ( tagName ? ) { customElements . whenDefined ( ESLCarousel . is ) . then ( ( ) => super . register . call ( this , tagName ) ) ; } }