JS number capitalization method

js Method of realizing digital capitalization ：

capitalMoney(num) {

var strOutput = '';

var strUnit = ' Ten billion, one hundred thousand, one hundred thousand, one hundred and ten yuan ';

num += '0';

var intPos = num.indexOf('.');

if (intPos >= 0) {

num = num.substring(0, intPos) + num.substr(intPos + 1, 1);

}

strUnit = strUnit.substr(strUnit.length - num.length);

for (var i = 0; i < num.length; i++) {

strOutput +=

' One two three four five six seven eight nine '.substr(num.substr(i, 1), 1) +

strUnit.substr(i, 1);

}

return strOutput

.replace(/ Zero angle $/, ' whole ')

.replace(/ zero [ Thousand hundred and ten ]/g, ' zero ')

.replace(/ zero {2,}/g, ' zero ')

.replace(/ zero ([ Billion | ten thousand ])/g, '$1')

.replace(/ zero + element /, ' element ')

.replace(/ 100 million {0,3} ten thousand /, ' Billion ')

.replace(/^ element /, ' zero yuan ');

}