One of our goals is to provide developers with access to newest ECMA-402 Intl APIs. Therefore, FormatJS suite also provide multiple high quality polyfills that are fully tested using the Official ECMAScript Conformance Test Suite.

Our current list of polyfills includes:

• Intl.PluralRules
• Intl.RelativeTimeFormat
• Intl.ListFormat
• Intl.DisplayNames
• Intl.NumberFormat (ES2020)
• Intl.Locale
• Intl.LocaleMatcher
• Intl.getCanonicalLocales
• Intl.DateTimeFormat (ES2020)
• Intl.Segmenter
• Intl.DurationFormat
• Intl.supportedValuesOf

polyfill-fastly.io Integration

For basic use cases, we recommend using polyfill-fastly.io or polyfill-library to generate polyfill bundle since it automatically resolves the dependencies above for you.