script

export function upNumber(str) {
  str = str + '';
  var len = str.length - 1;
  var idxs = ['', '十', '百', '千', '万', '十', '百', '千', '亿', '十', '百', '千', '万', '十', '百', '千', '亿'];
  var num = ['零', '一', '二', '三', '四', '五', '六', '七', '八', '九'];
  return str.replace(/([1-9]|0+)/g, function ($, $1, idx, full) {
    var pos = 0;
    if ($1[0] != '0') {
      pos = len - idx;
      if (idx == 0 && $1[0] == 1 && idxs[len - idx] == '十') {
        return idxs[len - idx];
      }
      return num[$1[0]] + idxs[len - idx];
    }
    else {
      var left = len - idx;
      var right = len - idx + $1.length;
      if (Math.floor(right / 4) - Math.floor(left / 4) > 0) {
        pos = left - left % 4;
      }
      if (pos) {
        return idxs[pos] + num[$1[0]];
      } else if (idx + $1.length >= len) {
        return '';
      } else {
        return num[$1[0]]
      }
    }
  });
}