Is there a functionality in JavaScript to convert values into specific locale formats?

Question

Is there a built in function of JavaScript to convert a string into a particular locale (Euro in my case)?

E.g. 50.00 should get converted to 50,0

Answer 1

50.00 is a unit-less value. The best you can do is convert 50.00 to 50,00 and then append the € yourself. Therefore, just use Number.toLocaleString().

var i = 50.00;
alert(i.toLocaleString() + ' €'); // alerts '50.00 €' or '50,00 €'

Demo →

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Answer 2

Some of the other answers are okay but I would recommend a different library, NumeralJS over Number.toLocaleString because the latter is not supported widely in all browsers (it breaks on even new versions of safari). NumeralJS is really powerful and supports anything you would want to do with converting numbers to strings.

First, set the language (I chose french) and then format it:

numeral.language('fr');
numeral(50.00).format('0.00 $');

Outputs:

"50,00 €"

The website explains it quite well and has tons of examples.

Answer 3

Built-in, yes and no. There is Number.toLocaleString() but it is dependent on the system's locale.

However, there are some libraries which have modules for this. MooTools's Locale.Number for example allows you to convert a number into different locales (adding your own locale is trivial).

Locale.use("EU");
var inEuros = (50).formatCurrency(); // € 50,00

jsFiddle Demo

---

If you want the € sign to be printed after, you can simply create your own locale:

Locale.define('EU-suffix', 'Number', {
    currency: {
        suffix: ' €'
    }
}).inherit('EU', 'Number');

Answer 4

I found a way to do this at this page.

You can you toLocaleString without using toFixed before it. toFixed returns a string, toLocaleString should get a number. But you can pass an options object with toLocaleString, the option minimumFractionDigits could help you with the functionality toFixed has.

50.toLocaleString('de-DE', {
    style: 'currency', 
    currency: 'EUR', 
    minimumFractionDigits: 2 
});

Checkout all the other options you can pass with this function.

Answer 5

There are locale related features described within the ECMAScript Internationalization API.

To get the float 50.0 converted to the string 50,00 € (using the 'de-DE' locale) you need to write this:

new Intl.NumberFormat("de-DE", {style: "currency", currency: "EUR"}).format(50.0)

This API is available in all current major browsers.

For more info about the number formatting features of the Internationalization API you should read the article at MDN.

Answer 6

I have prepared small library to deal with currency formatting - money

money(1000.5, 'EUR');   // -> 1 000.50 €
money(1000.5, 'USD');   // -> $1,000.50
money(1000.5, 'PLN');   // -> 1 000,50 zł

Supported currency (ISO codes): PLN, EUR, USD, GBP, JPY, CZK, SEK