How to compress utf-16 string and decompress? about brotli HOT 4 CLOSED

import { compress, decompress } from "brotli-compress";

function strToUint8Array(str: string) {
  const codeUnits = Uint16Array.from(
    { length: str.length },
    (element, index) => str.charCodeAt(index)
  );
  return new Uint8Array(codeUnits.buffer);
}

function uInt8ArrayToStr(bytes: Uint8Array) {
  const charCodes = new Uint16Array(bytes.buffer);

  let result = "";
  charCodes.forEach((char) => {
    result += String.fromCharCode(char);
  });
  return result;
}

export async function compressStr(str: string) {
  if (str.length === 0) {
    return "";
  }

  const bytes = strToUint8Array(str);
  const compressStr =  await compress(bytes);
  return uInt8ArrayToStr(compressStr);
}

export async function decompressStr(compressStr: string) {
  if (compressStr.length === 0) {
    return "";
  }

  const compressBytes = strToUint8Array(compressStr);
  const decompressBytes = await decompress(compressBytes);
  return uInt8ArrayToStr(
    decompressBytes
  );
}