JavaScript处理数字转化为大写金额

• 通过使用JavaScript来处理金额大小写转化

export const digitUppercase = n => {
  const fraction = ["角", "分"];
  const digit = ["零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"];
  const unit = [
    ["元", "万", "亿"],
    ["", "拾", "佰", "仟"],
  ];
  n = Math.abs(n);
  let s = "";
  for (let i = 0; i < fraction.length; i++) {
    s += (
      digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]
    ).replace(/零./, "");
  }
  s = s || "";
  n = Math.floor(n);
  for (let i = 0; i < unit[0].length && n > 0; i++) {
    let p = "";
    for (let j = 0; j < unit[1].length && n > 0; j++) {
      p = digit[n % 10] + unit[1][j] + p;
      n = Math.floor(n / 10);
    }
    s = p.replace(/(零.)*零$/, "").replace(/^$/, "零") + unit[0][i] + s;
  }
  return s
    .replace(/(零.)*零元/, "元")
    .replace(/(零.)+/g, "零")
    .replace(/^整$/, "零元");
}