export declare function windowAspectRatio(): number;
export declare function onElementResize(target: HTMLElement, callback: Function): MutationObserver;
export declare function blockContextMenu(el: HTMLElement): void;
export declare function replaceQueryParam(str: string, param: string, val: string | number, replaceAll?: boolean): string;
export declare function addQueryParam(str: string, param: string, val: string | number): string;
export declare function hasQueryParam(str: string, param: string): boolean;
export declare function getQueryParam(str: string, param: string): string;
