How to use toLocaleString() and tofixed(2) in JavaScript

How can I do this in JavaScript?

var num = 2046430; 
num.toLocaleString();

will give you "2,046,430";

What I have tried is:

var num = 2046430; 
num.toLocaleString().toFixed(2);

Expected Output

"2,046,430.00"

Solution 1:

Taken from MDN:

Syntax

numObj.toLocaleString([locales [, options]])

toLocaleString takes 2 arguments. The first is the locale, the second are the options. As for the options, you are looking for:

minimumFractionDigits

The minimum number of fraction digits to use. Possible values are from 0 to 20; the default for plain number and percent formatting is 0; the default for currency formatting is the number of minor unit digits provided by the ISO 4217 currency code list (2 if the list doesn't provide that information).

https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString

To be able to set the options without setting the locale, you can pass undefined as first argument:

var num = 2046430;
num.toLocaleString(undefined, {minimumFractionDigits: 2}) // 2,046,430.00

However this also allows the fraction to be longer than 2 digits. So we need to look for one more option called maximumFractionDigits. (Also on that MDN page)

var num = 2046430.123;
num.toLocaleString(undefined, {
  minimumFractionDigits: 2,
  maximumFractionDigits: 2
}) // 2,046,430.12