JS: 数字中文大写

export const toChinesNum = (num) => {
  let changeNum = ['零', '一', '二', '三', '四', '五', '六', '七', '八', '九'];
  let unit = ["", "十", "百", "千", "万"];
  num = parseInt(num);
  let getWan = (temp) => {
    let strArr = temp.toString().split("").reverse();
    let newNum = "";
    for (var i = 0; i < strArr.length; i++) {
      newNum = (i === 0 && strArr[i] == 0 ? "" : (i > 0 && strArr[i] == 0 && strArr[i - 1] == 0 ? "" : changeNum[strArr[i]] + (strArr[i] == 0 ? unit[0] : unit[i]))) + newNum;
    }
    return newNum;
  }
  let overWan = Math.floor(num / 10000);
  let noWan = num % 10000;
  if (noWan.toString().length < 4) {
    noWan = "0" + noWan;
  }
  return overWan ? getWan(overWan) + "万" + getWan(noWan) : getWan(num);
}