A spec-compliant polyfill/ponyfill for Intl.Locale tested by the official ECMAScript Conformance test suite

npm Version size

Installation

npm i @formatjs/intl-locale

Requirements

Usage

Via polyfill-fastly.io

You can use polyfill-fastly.io URL Builder to create a polyfill script tag for Intl.Locale. For example:

<!-- Polyfill Intl.Locale & its dependencies -->
<script src="https://polyfill-fastly.io/v3/polyfill.min.js?features=Intl.Locale"></script>

Simple

import '@formatjs/intl-locale/polyfill.js'

Dynamic import + capability detection

async function polyfill() {
  // This platform already supports Intl.Locale
  if (shouldPolyfill()) {
    await import('@formatjs/intl-locale/polyfill.js')
  }
  // Alternatively, force the polyfill regardless of support
  await import('@formatjs/intl-locale/polyfill-force.js')
}

Tests

This library is test262-compliant.