PolyfillsIntl.supportedValuesOfOn this pageIntl.supportedValuesOfA spec-compliant polyfill/ponyfill for Intl.supportedValuesOf. Installation npmyarnnpm i @formatjs/intl-enumeratoryarn add @formatjs/intl-enumerator Requirements Intl.Collator Intl.DateTimeFormat or polyfill Intl.NumberFormat or polyfill. Usage Simple import '@formatjs/intl-enumerator/polyfill' Dynamic import + capability detection