import { TemplateRef, ViewContainerRef, ElementRef, OnInit } from '@angular/core';
import { UniversalService } from '../services/universal.service';
import * as i0 from "@angular/core";
/**
 * Provides the base functionality for platform directives to render elements only on certain platforms.
 *
 * @export
 * @abstract
 * @class PlatformDirective
 * @implements {OnInit}
 */
export declare abstract class PlatformDirective implements OnInit {
    private template;
    private viewContainer;
    protected universal: UniversalService;
    constructor(template: TemplateRef<ElementRef>, viewContainer: ViewContainerRef, universal: UniversalService);
    /**
     * Checks whether the element should be rendered on the current platform and renders it.
     */
    ngOnInit(): void;
    /**
     * Checks whether the element should be rendered on the current platform.
     *
     * @protected
     * @abstract
     * @returns {boolean}
     */
    protected abstract shouldRender(): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<PlatformDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<PlatformDirective, never, never, {}, {}, never, never, false>;
}