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      JS Intl.NumberFormat 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 NumberFormat object.

      The source for this interactive example is stored in a GitHub repository. If you’d like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

      Syntax

      numberFormat.resolvedOptions()
      

      Return value

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

      Description

      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 requested using the Unicode extension key "nu" or filled in as a default.

      style

      useGrouping

      The values provided for these properties in the options argument or filled in as defaults.

      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

      var de = new Intl.NumberFormat('de-DE');
      var usedOptions = de.resolvedOptions();
      
      usedOptions.locale;                // "de-DE"
      usedOptions.numberingSystem;       // "latn"
      usedOption.style;                  // "decimal"
      usedOptions.minimumIntegerDigits;  // 1
      usedOptions.minimumFractionDigits; // 0
      usedOptions.maximumFractionDigits; // 3
      usedOptions.useGrouping;           // true
      
      

      Specifications

      SpecificationStatusComment
      [ECMAScript Internationalization API 1.0 (ECMA-402)
      The definition of ‘Intl.NumberFormat.prototype.resolvedOptions’ in that specification.](https://www.ecma-international.org/ecma-402/1.0/#sec-11.3.3)StandardInitial definition.
      [ECMAScript Internationalization API 2.0 (ECMA-402)
      The definition of ‘Intl.NumberFormat.prototype.resolvedOptions’ in that specification.](https://www.ecma-international.org/ecma-402/2.0/#sec-11.3.3)Standard 
      [ECMAScript Internationalization API 4.0 (ECMA-402)
      The definition of ‘Intl.NumberFormat.prototype.resolvedOptions’ in that specification.](https://tc39.es/ecma402/#sec-Intl.NumberFormat.prototype.resolvedOptions)Draft 

      See also

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