import { ElementRef } from '@angular/core';
import { StickyDirective } from '../../interfaces';
import * as i0 from "@angular/core";
export declare class HeaderDirective implements StickyDirective {
    elementRef: ElementRef;
    idAttribute: string;
    constructor(elementRef: ElementRef);
    get sticky(): boolean;
    get offset(): number;
    static ɵfac: i0.ɵɵFactoryDeclaration<HeaderDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<HeaderDirective, "[airHeader], [airStickyHeader]", never, {}, {}, never>;
}