FormatJS

This repository is the home of FormatJS and related libraries.

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Development

See CONTRIBUTING.md for instructions.

Published Packages

Choose by application ecosystem. Registry names identify how to install a package; implementation language can differ. For example, @formatjs/cli is Rust-backed and distributed through npm.

Ecosystem	Distribution	Entry point
JavaScript / TypeScript	npm	React, Vue, Svelte, message formatting, Intl polyfills, build tools
Rust	crates.io	Message runtime, parsers, Intl cores
Python	PyPI	Rust-backed message runtime and parser bindings
Hermes / React Native	GitHub Releases	Native SDK with Rust libraries and C++/JSI installers

Intl APIs: npm and Rust

npm packages expose JavaScript APIs with TypeScript types. Rust crates expose native operations for Rust applications and host integrations. LocaleMatcher is a proposal ponyfill; the other rows implement standardized Intl APIs.

API	JavaScript / TypeScript (npm)	Rust (crates.io)
Collator	@formatjs/intl-collator	formatjs_intl_collator
DateTimeFormat	@formatjs/intl-datetimeformat	formatjs_intl_datetimeformat
DisplayNames	@formatjs/intl-displaynames	formatjs_intl_displaynames
DurationFormat	@formatjs/intl-durationformat	formatjs_intl_durationformat
getCanonicalLocales	@formatjs/intl-getcanonicallocales	formatjs_intl_getcanonicallocales
ListFormat	@formatjs/intl-listformat	formatjs_intl_listformat
Locale	@formatjs/intl-locale	formatjs_intl_locale
LocaleMatcher	@formatjs/intl-localematcher

This is the beginning of the README. Read the rest at the original. Read the full README ↗