Intl.PluralRules

A spec-compliant polyfill for Intl.PluralRules fully tested by the official ECMAScript Conformance test suite

Installation

npm

npm i @formatjs/intl-pluralrules

yarn

yarn add @formatjs/intl-pluralrules

Requirements

• Intl.getCanonicalLocales or polyfill
• Intl.Locale or polyfill.

Usage

Via polyfill.io

You can use polyfill.io URL Builder to create a polyfill script tag for Intl.PluralRules. By default the created URL does not come with any locale data. In order to add locale data, append Intl.PluralRules.~locale.<locale> to your list of features. For example:

<!-- Polyfill Intl.PluralRules, its dependencies & `en` locale data -->
<script src="https://polyfill.io/v3/polyfill.min.js?features=Intl.PluralRules,Intl.PluralRules.~locale.en"></script>

Simple

import '@formatjs/intl-pluralrules/polyfill'
import '@formatjs/intl-pluralrules/locale-data/en' // locale-data for en

Dynamic import + capability detection

import {shouldPolyfill} from '@formatjs/intl-pluralrules/should-polyfill'
async function polyfill(locale: string) {
  const unsupportedLocale = shouldPolyfill(locale)
  // This locale is supported
  if (!unsupportedLocale) {
    return
  }
  // Load the polyfill 1st BEFORE loading data
  await import('@formatjs/intl-pluralrules/polyfill-force')
  await import(`@formatjs/intl-pluralrules/locale-data/${unsupportedLocale}`)
}