如何在JavaScript和node中将总纳秒转换为HH:MM:SS:ms:ns格式的字符串？

function formatTime(nanoseconds) {
  const milliseconds = Math.floor(nanoseconds / 1000000);
  const seconds = Math.floor(milliseconds / 1000);
  const minutes = Math.floor(seconds / 60);
  const hours = Math.floor(minutes / 60);

  const ns = nanoseconds % 1000000;
  const ms = milliseconds % 1000;
  const ss = seconds % 60;
  const mm = minutes % 60;
  const hh = hours % 24;

  return `${pad(hh)}:${pad(mm)}:${pad(ss)}:${pad(ms, 3)}:${pad(ns, 6)}`;
}

function pad(number, length = 2) {
  let str = String(number);
  while (str.length < length) {
    str = '0' + str;
  }
  return str;
}

const totalNanoseconds = 123456789012345;
const formattedTime = formatTime(totalNanoseconds);
console.log(formattedTime);