/// <reference types="react" />
/** converting camel-cased strings to be lowercase and link it with Separato */
export declare function toLowercaseSeparator(key: string): string;
/**
 * 获取样式字符串
 *
 * @param style - 样式对象，React 的 CSSProperties 类型
 * @returns 返回样式字符串
 */
export declare function getStyleStr(style: React.CSSProperties): string;
/** Returns the ratio of the device's physical pixel resolution to the css pixel resolution */
export declare function getPixelRatio(): number;
/** Whether to re-render the watermark */
export declare const reRendering: (mutation: MutationRecord, isWatermarkEle: (ele: any) => boolean) => boolean;