export declare function instanceofImageBitmap(value: any): value is ImageBitmap;
export declare function instanceofBlob(value: any): value is Blob;
export declare function instanceofHTMLImageElement(value: any): value is HTMLImageElement;
export declare function instanceofHTMLCanvasElement(value: any): value is HTMLCanvasElement;
export declare function instanceofHTMLVideoElement(value: any): value is HTMLVideoElement;
export declare function instanceofHTMLElement(value: any): value is HTMLElement;
export declare function getURLRef(src: string, baseUrl: string): string;