import { ElementRef, OnChanges, Renderer2, SimpleChanges } from "@angular/core";
import { MdlError } from "../common/mdl-error";
import * as i0 from "@angular/core";
export declare class MdlUnsupportedShadowValueError extends MdlError {
    constructor(value: number | string);
}
export declare class MdlShadowDirective implements OnChanges {
    private elementRef;
    private renderer;
    private readonly el;
    private mdlShadowIntern;
    constructor(elementRef: ElementRef, renderer: Renderer2);
    get mdlShadow(): number;
    set mdlShadow(value: number | string);
    ngOnChanges(changes: SimpleChanges): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MdlShadowDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MdlShadowDirective, "[mdl-shadow]", never, { "mdlShadow": "mdl-shadow"; }, {}, never, never, false, never>;
}