Nodejs String to Currency Convert toCurrency()

Method Source Code

String.prototype.toCurrency = function() {
   var pattern = /^\d{4,}/;
   return pattern.test(this) ? parseFloat(this).toLocaleString() : this;
};

Related

1. toCurrency()

   String.prototype.toCurrency = function(){
     var splitNum = this.split(".");
     var numCurrency = splitNum[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",") + ("." + splitNum[1]);
     return numCurrency;
   };
   

2. toCurrency()

   String.prototype.toCurrency = function() {
     var isNumberRegex = /^[0-9]+(\.[0-9]+)?$/;
     if (!isNumberRegex.test(this)) {
       return NaN;
     return parseFloat(Number(this).toFixed(2))
       .toString()
       .replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1,');
   };
   ...
   

3. toCurrency()

   String.prototype.toCurrency = function() {
     var pattern = /(\d)(?=(\d{3})+(?=\.))/g
     return this.toString().replace(pattern, "$1,");
   };
   

4. toCurrency(rounder)

   String.prototype.toCurrency = function(rounder) {
       aDigits = parseFloat(this).toFixed(rounder).split(".");
       aDigits[0] = aDigits[0].split("").reverse().join("")
                                       .replace(/(\d{3})(?=\d)/g, "$1,").split("").reverse().join("");
       return aDigits.join(".");