import { OnChanges, ElementRef, SimpleChanges } from '@angular/core';
import * as i0 from "@angular/core";
export declare const smoothHeight: import("@angular/animations").AnimationTriggerMetadata;
export declare const showHide: import("@angular/animations").AnimationTriggerMetadata;
export declare class SmoothHeightDirective implements OnChanges {
    smoothHeight: import("@angular/core").InputSignal<unknown>;
    pulse: import("@angular/core").WritableSignal<boolean>;
    startHeight: import("@angular/core").WritableSignal<number>;
    host: ElementRef<any>;
    get grow(): {
        value: boolean;
        params: {
            startHeight: number;
        };
    };
    setStartHeight(): void;
    ngOnChanges(changes: SimpleChanges): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SmoothHeightDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<SmoothHeightDirective, "[smoothHeight]", never, { "smoothHeight": { "alias": "smoothHeight"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}