import { ElementRef, OnChanges, OnInit } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * Abstract base class for widget components that need to be lazily loaded
 * with SSR support. This class handles the common lifecycle patterns:
 * - Browser detection for SSR compatibility
 * - Lazy loading of widgets
 * - DOM manipulation (appending to element)
 * - Lifecycle coordination between loading, setup, and event listeners
 *
 * Derived components must implement:
 * - loadWidget(): Dynamic import and instantiation of the specific widget
 * - setupWebComponent(): Configure attributes and properties on the widget
 * - setupEventListeners(): Attach event listeners to the widget
 */
export declare abstract class BaseLazyWidgetComponent implements OnInit, OnChanges {
    protected elementRef: ElementRef;
    protected platformId: object;
    protected webComponent?: HTMLElement;
    constructor(elementRef: ElementRef, platformId: object);
    ngOnInit(): Promise<void>;
    ngOnChanges(): void;
    /**
     * Load the widget module dynamically. This method should:
     * 1. Dynamically import the widget module
     * 2. Instantiate the widget
     * 3. Return the widget as an HTMLElement
     * 4. Handle errors appropriately
     *
     * @returns The instantiated widget element, or null if loading failed
     */
    protected abstract loadWidget(): Promise<HTMLElement | null>;
    /**
     * Configure the web component by setting attributes and properties.
     * This is called after the widget is loaded and whenever inputs change.
     */
    protected abstract setupWebComponent(): void;
    /**
     * Attach event listeners to the web component.
     * This is called once after the view is initialized.
     */
    protected abstract setupEventListeners(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<BaseLazyWidgetComponent, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<BaseLazyWidgetComponent, never, never, {}, {}, never, never, true, never>;
}