Intl.NumberFormat.prototype.format()
The Intl.NumberFormat.prototype.format()
method formats a
number according to the locale and formatting options of this
Intl.NumberFormat
object.
Syntax
format(number)
Parameters
Description
The format
getter function formats a number into a string according to the
locale and formatting options of this Intl.NumberFormat
object.
Examples
Using format
Use the format
getter function for formatting a single currency value,
here for Russia:
var options = { style: 'currency', currency: 'RUB' };
var numberFormat = new Intl.NumberFormat('ru-RU', options);
console.log(numberFormat.format(654321.987));
// → "654 321,99 руб."
Using format with map
Use the format
getter function for formatting all numbers in an array.
Note that the function is bound to the Intl.NumberFormat
from which it was
obtained, so it can be passed directly to Array.prototype.map
. This is
considered a historical artefact, as part of a convention which is no longer followed
for new features, but is preserved to maintain compatibility with existing programs.
var a = [123456.789, 987654.321, 456789.123];
var numberFormat = new Intl.NumberFormat('es-ES');
var formatted = a.map(n => numberFormat.format(n));
console.log(formatted.join('; '));
// → "123.456,789; 987.654,321; 456.789,123"
Specifications
Specification |
---|
ECMAScript Internationalization API Specification # sec-intl.numberformat.prototype.format |
Browser compatibility
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