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Intl.NumberFormat.prototype.resolvedOptions()

The Intl.NumberFormat.prototype.resolvedOptions() method returns a new object with properties reflecting the locale and number formatting options computed during initialization of this Intl.NumberFormat object.

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Syntax

resolvedOptions()

Return value

A new object with properties reflecting the locale and number formatting options computed during the construction of the given Intl.NumberFormat object.

The resulting object has the following properties:

locale: The BCP 47 language tag for the locale actually used. If any Unicode extension values were requested in the input BCP 47 language tag that led to this locale, the key-value pairs that were requested and are supported for this locale are included in locale.
numberingSystem: The value provided for this properties in the options argument, if present, or the value requested using the Unicode extension key "nu" or filled in as a default.
notation: The value provided for this property in the options argument, if present, or "standard" filled in as a default.
compactDisplay: The value provided for this property in the options argument, or "short" filled in as a default. This property is only present if the notation is set to "compact".
signDisplay: The value provided for this property in the options argument, or "auto" filled in as a default.
useGrouping: The value provided for the useGrouping property in the constructor options argument or the default value ("auto").
currency, currencyDisplay: The values provided for these properties in the options argument or filled in as defaults. These properties are only present if style is "currency".

Only one of the following two groups of properties is included:

minimumIntegerDigits, minimumFractionDigits, maximumFractionDigits: The values provided for these properties in the options argument or filled in as defaults. These properties are present only if neither minimumSignificantDigits nor maximumSignificantDigits was provided in the options argument.
minimumSignificantDigits, maximumSignificantDigits: The values provided for these properties in the options argument or filled in as defaults. These properties are present only if at least one of them was provided in the options argument.

Examples

Using the `resolvedOptions` method

const de = new Intl.NumberFormat('de-DE');
const usedOptions = de.resolvedOptions();

usedOptions.locale;                // "de-DE"
usedOptions.numberingSystem;       // "latn"
usedOptions.notation;              // "standard"
usedOptions.signDisplay;           // "auto"
usedOptions.style;                 // "decimal"
usedOptions.minimumIntegerDigits;  // 1
usedOptions.minimumFractionDigits; // 0
usedOptions.maximumFractionDigits; // 3
usedOptions.useGrouping;           // true

Specifications

Specification
ECMAScript Internationalization API Specification # sec-intl.numberformat.prototype.resolvedoptions

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`resolvedOptions`	24	12	29	11	15	10	4.4	25	56	14	10	1.5	1.8	0.12.0 Before version 13.0.0, only the locale data for `en-US` is available by default. See the `NumberFormat()` constructor for more details.
`result_useGrouping_property`	No	No	preview	No	No	No	No	No	preview	No	No	No	No	No