/**
 * 将空格、回车、Tab转译为html
 *
 * @param str
 * @returns {*|string}
 * @private
 */
export declare function _html(str: string): string;
/**
 * 判断一个对象是否为逻辑上的空
 */
export declare function _isEmpty<T>(value: T): boolean;
export declare function _nonEmpty<T>(value: T): boolean;
/**
 * 将字符串中的html标签转译
 *
 * @param str
 * @returns {*|string}
 * @private
 */
export declare function _unHtml(str?: string): string;
export declare function _sleep(time: number): Promise<unknown>;
export declare function _screenType(width?: number): {
    xs: boolean;
    sm: boolean;
    md: boolean;
    lg: boolean;
    xl: boolean;
};
/**
 * 获取字符的字节长度
 */
export declare function _getByteLen(char: string): number;
/**
 * 获取两个连续字符串的不同部分
 */
export declare function _getStrDifferent(one: string, two: string): string;