FormatJS Intl polyfills for quickjs.rb — granular, dependency-aware, English locale.

gem install quickjs-polyfill-intl

gem 'quickjs-polyfill-intl'

Requires quickjs >= 0.19.0.pre2.

Each Intl API has its own require path. Requiring a path registers two feature symbols:

• :<name> — the API's own bundle only; you must include all dependencies in features: yourself (in order).
• :<name>_all — a self-contained bundle with all dependencies included; works standalone.

The simplest way: one symbol, no manual dependency management.

require 'quickjs'
require 'quickjs-polyfill-intl/datetimeformat'

vm = Quickjs::VM.new(features: [:polyfill_intl_datetimeformat_all])
vm.eval_code('new Intl.DateTimeFormat("en", { year: "numeric" }).format(new Date(0))')
# => "1970"

Load each API separately and list them all in features: in dependency order. Useful when combining multiple Intl APIs in one VM — each minimal bundle is cached independently, so shared deps aren't recompiled.

require 'quickjs'
require 'quickjs-polyfill-intl/datetimeformat'  # chains all deps automatically

vm = Quickjs::VM.new(features: [
  :polyfill_intl_getcanonicallocales,
  :polyfill_intl_locale,
  :polyfill_intl_pluralrules,
  :polyfill_intl_numberformat,
  :polyfill_intl_datetimeformat,
])

require 'quickjs-polyfill-intl/all'

vm = Quickjs::VM.new(features: [:polyfill_intl_datetimeformat_all, :polyfill_intl_listformat_all])

Requiring a path also requires its full dependency chain, so all dependent symbols are registered automatically.

The minified bundles in lib/quickjs-polyfill-intl/vendor/ are committed to the repo. To rebuild after updating FormatJS package versions:

rake js:build

Requires Node.js and npm.

• @ursm — for the Quickjs.register_polyfill API that makes this gem possible

• lib/quickjs-polyfill-intl/vendor/ (bundled and minified from js/)
  • MIT License Copyright (c) 2022 FormatJS
    • @formatjs/intl-supportedvaluesof
    • @formatjs/intl-segmenter
  • MIT License Copyright (c) 2023 FormatJS
    • @formatjs/intl-getcanonicallocales
    • @formatjs/intl-locale
    • @formatjs/intl-displaynames
    • @formatjs/intl-listformat
    • @formatjs/intl-pluralrules
    • @formatjs/intl-numberformat
    • @formatjs/intl-relativetimeformat
    • @formatjs/intl-datetimeformat
    • @formatjs/intl-durationformat
    • @formatjs/fast-memoize
    • @formatjs/intl-localematcher
  • MIT License Copyright (c) 2026 FormatJS
    • @formatjs/bigdecimal
    • @formatjs/intl-collator

Otherwise, the MIT License, Copyright 2026 by Kengo Hamasaki.