/**
 * Creates an array containing the numeric code points of each Unicode
 * character in the string. While JavaScript uses UCS-2 internally,
 * this function will convert a pair of surrogate halves (each of which
 * UCS-2 exposes as separate characters) into a single code point,
 * matching UTF-16.
 *
 * @param input The Unicode input string (UCS-2).
 * @returns {number[]} The new array of code points.
 */
export declare function ucs2decode(input: string): number[];
/**
 * Creates a string based on an array of numeric code points.
 *
 * @param {number[]} codePoints The array of numeric code points.
 * @returns {string} The new Unicode string (UCS-2).
 */
export declare function ucs2encode(codePoints: number[]): string;
/**
 * Encode symbol to represent in HTML page
 * @param codePoints
 */
export declare function encodeHtml(codePoints: number[]): string;
export declare function encodeCss(codePoints: number[]): string;
/**
 * Decode HTML to codepoints
 * @param htmlCharacter
 */
export declare function decodeHtml(htmlCharacter: string): number[];