import { AfterViewInit, ElementRef, OnChanges, SimpleChanges } from '@angular/core';
/**
 * Add parameters to srcset to support serving images through imgix.com domain.
 * Some default values are based on imgix.com documentation
 *
 * __Usage :__
 *   <img src="https://domain.com/any.png" imgService="w=100">
 *
 * __Example :__
 *   <img src="https://domain.com/any.png" srcset="https://domain.com/any.png?w=100&dpr=2 2x ..."></div>
 *
 */
export declare class ImgServiceDirective implements AfterViewInit, OnChanges {
    private elementRef;
    params: string;
    imgServiceBinding: string;
    defaultParams: string;
    constructor(elementRef: ElementRef);
    ngAfterViewInit(): void;
    protected applyChanges(src: string): void;
    ngOnChanges(changes: SimpleChanges): void;
}