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Intl.NumberFormat 객체는 언어에 민감한 숫자 포맷을 사용하도록 하는 객체 생성자 입니다.

Syntax

new Intl.NumberFormat([locales[, options]])
Intl.NumberFormat.call(this[, locales[, options]])

Parameters

locales

추가요소 입니다. BCP 47 언어 태그가 있는 문자열, 또는 이러한 문자열의 배열을 말합니다. 로케일 인수에 대한 일반적인 형식 및 해석은 Intl page을 참조하세요. 다음의 Unicode 확장 키가 허용됩니다:

nu
사용할 번호를 매기는 시스템입니다. 다음과 같은 사용가능 값 들이 있습니다: "arab", "arabext", "bali", "beng", "deva", "fullwide", "gujr", "guru", "hanidec", "khmr", "knda", "laoo", "latn", "limb", "mlym", "mong", "mymr", "orya", "tamldec", "telu", "thai", "tibt".
options

추가요소 입니다. 다음 프로퍼티의 일부 또는 전체를 가지는 객체는 다음과 같습니다:

localeMatcher
로컬 매칭 알고리즘을 사용합니다. 가능한 값은 "lookup" 과 "best fit"입니다; 기본값은 "best fit"입니다. 이 옵션에 대해 더욱 많은 것을 알고 싶다면, Intl page를 참고하세요.
style
The formatting style to use. Possible values are "decimal" for plain number formatting, "currency" for currency formatting, and "percent" for percent formatting; the default is "decimal".
currency
The currency to use in currency formatting. Possible values are the ISO 4217 currency codes, such as "USD" for the US dollar, "EUR" for the euro, or "CNY" for the Chinese RMB — see the Current currency & funds code list. There is no default value; if the style is "currency", the currency property must be provided.
currencyDisplay
How to display the currency in currency formatting. Possible values are "symbol" to use a localized currency symbol such as €, "code" to use the ISO currency code, "name" to use a localized currency name such as "dollar"; the default is "symbol".
useGrouping
Whether to use grouping separators, such as thousands separators or thousand/lakh/crore separators. Possible values are true and false; the default is true.

The following properties fall into two groups: minimumIntegerDigits, minimumFractionDigits, and maximumFractionDigits in one group, minimumSignificantDigits and maximumSignificantDigits in the other. If at least one property from the second group is defined, then the first group is ignored.

minimumIntegerDigits
The minimum number of integer digits to use. Possible values are from 1 to 21; the default is 1.
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).
maximumFractionDigits
The maximum number of fraction digits to use. Possible values are from 0 to 20; the default for plain number formatting is the larger of minimumFractionDigits and 3; the default for currency formatting is the larger of minimumFractionDigits and the number of minor unit digits provided by the ISO 4217 currency code list (2 if the list doesn't provide that information); the default for percent formatting is the larger of minimumFractionDigits and 0.
minimumSignificantDigits
The minimum number of significant digits to use. Possible values are from 1 to 21; the default is 1.
maximumSignificantDigits
The maximum number of significant digits to use. Possible values are from 1 to 21; the default is 21.

Description

Properties

Intl.NumberFormat.prototype
Allows the addition of properties to all objects.

Methods

Intl.NumberFormat.supportedLocalesOf()
Returns an array containing those of the provided locales that are supported without having to fall back to the runtime's default locale.

NumberFormat instances

Properties

NumberFormat instances inherit the following properties from their prototype:

Intl.NumberFormat.prototype.constructor
A reference to Intl.NumberFormat.
Intl.NumberFormat.prototype.format
Getter; returns a function that formats a number according to the locale and formatting options of this NumberFormat object.

Methods

NumberFormat instances inherit the following methods from their prototype:

Intl.NumberFormat.prototype.formatToParts()
Returns an Array of objects representing the number string in parts that can be used for custom locale-aware formatting.
Intl.NumberFormat.prototype.resolvedOptions()
Returns a new object with properties reflecting the locale and collation options computed during initialization of the object.

Examples

Basic usage

In basic use without specifying a locale, a formatted string in the default locale and with default options is returned.

var number = 3500;

console.log(new Intl.NumberFormat().format(number));
// → '3,500' if in US English locale

Using locales

This example shows some of the variations in localized number formats. In order to get the format of the language used in the user interface of your application, make sure to specify that language (and possibly some fallback languages) using the locales argument:

var number = 123456.789;

// German uses comma as decimal separator and period for thousands
console.log(new Intl.NumberFormat('de-DE').format(number));
// → 123.456,789

// Arabic in most Arabic speaking countries uses real Arabic digits
console.log(new Intl.NumberFormat('ar-EG').format(number));
// → ١٢٣٤٥٦٫٧٨٩

// India uses thousands/lakh/crore separators
console.log(new Intl.NumberFormat('en-IN').format(number));
// → 1,23,456.789

// the nu extension key requests a numbering system, e.g. Chinese decimal
console.log(new Intl.NumberFormat('zh-Hans-CN-u-nu-hanidec').format(number));
// → 一二三,四五六.七八九

// when requesting a language that may not be supported, such as
// Balinese, include a fallback language, in this case Indonesian
console.log(new Intl.NumberFormat(['ban', 'id']).format(number));
// → 123.456,789

Using options

The results can be customized using the options argument:

var number = 123456.789;

// request a currency format
console.log(new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(number));
// → 123.456,79 €

// the Japanese yen doesn't use a minor unit
console.log(new Intl.NumberFormat('ja-JP', { style: 'currency', currency: 'JPY' }).format(number));
// → ¥123,457

// limit to three significant digits
console.log(new Intl.NumberFormat('en-IN', { maximumSignificantDigits: 3 }).format(number));
// → 1,23,000

Specifications

Specification Status Comment
ECMAScript Internationalization API 1.0 (ECMA-402)
The definition of 'Intl.NumberFormat' in that specification.
Standard Initial definition.
ECMAScript Internationalization API 2.0 (ECMA-402)
The definition of 'Intl.NumberFormat' in that specification.
Standard  
ECMAScript Internationalization API 4.0 (ECMA-402)
The definition of 'Intl.NumberFormat' in that specification.
Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung InternetNode.js
Basic supportChrome Full support 24Edge Full support YesFirefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support 4.4Chrome Android Full support 26Edge Mobile Full support YesFirefox Android Full support 56Opera Android Full support 37Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?
prototypeChrome Full support 24Edge Full support YesFirefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Edge Mobile Full support YesFirefox Android Full support 56Opera Android ? Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?
formatChrome Full support 24Edge Full support YesFirefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Edge Mobile Full support YesFirefox Android Full support 56Opera Android ? Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?
formatToParts
Experimental
Chrome Full support 63
Notes Disabled
Full support 63
Notes Disabled
Notes Need to set the flag on the commandline via --js-flags
Disabled From version 63: this feature is behind the harmony-number-format-to-parts runtime flag.
Edge Full support YesFirefox Full support 58IE ? Opera ? Safari ? WebView Android No support NoChrome Android Full support 63
Notes Disabled
Full support 63
Notes Disabled
Notes Need to set the flag on the commandline via --js-flags
Disabled From version 63: this feature is behind the harmony-number-format-to-parts runtime flag.
Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android No support Nonodejs ?
resolvedOptionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Edge Mobile Full support YesFirefox Android Full support 56Opera Android ? Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?
supportedLocalesOfChrome Full support 24Edge Full support YesFirefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Edge Mobile Full support YesFirefox Android Full support 56Opera Android ? Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.

See also

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