小写数字转汉字或者转为金额

function convertCurrency(money) {
//汉字的数字
// let cnNums = new Array('零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖');
let cnNums = new Array('零', '一', '二', '三', '四', '五', '六', '七', '八', '九');
//基本单位
// let cnIntRadice = new Array('', '拾', '佰', '仟');
let cnIntRadice = new Array('', '十', '百', '千');
//对应整数部分扩展单位
let cnIntUnits = new Array('', '万', '亿', '兆');
//对应小数部分单位
// let cnDecUnits = new Array('角', '分', '毫', '厘');
let cnDecUnits = new Array('', '', '', '');
//整数金额时后面跟的字符
// let cnInteger = '整';
let cnInteger = '';
//整型完以后的单位
// let cnIntLast = '元';
let cnIntLast = '';
//最大处理的数字
let maxNum = 999999999999999.9999;
//金额整数部分
let integerNum;
//金额小数部分
let decimalNum;
//输出的中文金额字符串
let chineseStr = '';
//分离金额后用的数组，预定义
let parts;
if (money == '') {
return '零元整';
}
money = parseFloat(money);
if (money >= maxNum) {
//超出最大处理数字
return '超出最大处理数字';
}
if (money == 0) {
chineseStr = cnNums[0] + cnIntLast + cnInteger;
return chineseStr;
}
//转换为字符串
money = money.toString();
if (money.indexOf('.') == -1) {
integerNum = money;
decimalNum = '';
} else {
parts = money.split('.');
integerNum = parts[0];
decimalNum = parts[1].substr(0, 4);
}
//获取整型部分转换
if (parseInt(integerNum, 10) > 0) {
let zeroCount = 0;
let IntLen = integerNum.length;
for (let i = 0; i < IntLen; i++) {
let n = integerNum.substr(i, 1);
let p = IntLen - i - 1;
let q = p / 4;
let m = p % 4;
if (n == '0') {
zeroCount++;
} else {
if (zeroCount > 0) {
chineseStr += cnNums[0];
}
//归零
zeroCount = 0;
chineseStr += cnNums[parseInt(n)] + cnIntRadice[m];
}
if (m == 0 && zeroCount < 4) {
chineseStr += cnIntUnits[q];
}
}
chineseStr += cnIntLast;
}
//小数部分
if (decimalNum != '') {
// chineseStr += ''
chineseStr += '点'
let decLen = decimalNum.length;
for (let i = 0; i < decLen; i++) {
let n = decimalNum.substr(i, 1);
if (n != '0') {
chineseStr += cnNums[Number(n)] + cnDecUnits[i];
}
}
}
if (chineseStr == '') {
chineseStr += cnNums[0] + cnIntLast + cnInteger;
} else if (decimalNum == '') {
chineseStr += cnInteger;
}
return chineseStr;
}
console.log(convertCurrency(Number(5491.1314)))

function convertCurrency(money) {
//汉字的数字
// let 