The toLocaleString() method returns a string representing the elements of the typed array. The elements are converted to strings and are separated by a locale-specific string (such as a comma “,”). This method has the same algorithm as Array.prototype.toLocaleString() and, as the typed array elements are numbers, the same algorithm as Number.prototype.toLocaleString() applies for each element. TypedArray is one of the typed array types here.
Syntax
typedarray.toLocaleString([locales [, options]]);
Parameters
locales-
Optional. A string with a BCP 47 language tag, or an array of such strings. For the general form and interpretation of the
localesargument, see the Intl page. The following Unicode extension key is allowed:nu- The numbering system to be used. Possible values include:
"arab","arabext","bali","beng","deva","fullwide","gujr","guru","hanidec","khmr","knda","laoo","latn","limb","mlym","mong","mymr","orya","tamldec","telu","thai","tibt".
options-
Optional. An object with some or all of the following properties:
localeMatcher- The locale matching algorithm to use. Possible values are
"lookup"and"best fit"; the default is"best fit". For information about this option, see the Intl page. 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 thestyleis"currency", thecurrencyproperty 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
trueandfalse; the default istrue.
The following properties fall into two groups:
minimumIntegerDigits,minimumFractionDigits, andmaximumFractionDigitsin one group,minimumSignificantDigitsandmaximumSignificantDigitsin 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
minimumFractionDigitsand 3; the default for currency formatting is the larger ofminimumFractionDigitsand 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 ofminimumFractionDigitsand 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.
Return value
A string representing the elements of the typed array.
Examples
Using toLocaleString
var uint = new Uint32Array([2000, 500, 8123, 12, 4212]);
uint.toLocaleString();
// if run in a de-DE locale
// "2.000,500,8.123,12,4.212"
uint.toLocaleString('en-US');
// "2,000,500,8,123,12,4,212"
uint.toLocaleString('ja-JP', { style: 'currency', currency: 'JPY' });
// "￥2,000,￥500,￥8,123,￥12,￥4,212"
Specifications
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'TypedArray.prototype.toLocaleString' in that specification. |
Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262) The definition of 'TypedArray.prototype.toLocaleString' in that specification. |
Draft |
Browser compatibility
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | Yes | ? | 51 | 10 | Yes | Yes |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | ? | 51 | Yes | Yes | Yes |