/**
 * Present while the image is loading.
 */
export declare const loading = "data-loading";
/**
 * Present when the image failed to load.
 */
export declare const error = "data-error";
/**
 * Present when the image begins animating in.
 */
export declare const startingStyle = "data-starting-style";
/**
 * Present when the image is animating out.
 */
export declare const endingStyle = "data-ending-style";