🌐 use-intl

Internationalization for React that gets out of your way.

Features

Internationalization is an essential part of the user experience. use-intl gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.

• 🌟 ICU message syntax: Localize your messages with interpolation, plurals, ordinal pluralization, enum-based label selection and rich text.
• 📅 Dates, times & numbers: Apply appropriate formatting without worrying about server/client differences like time zones.
• ✅ Type-safe: Speed up development with autocompletion for message keys and catch typos early with compile-time checks.
• 💡 Hooks-only API: Learn a single API that can be used across your code base to turn translations into plain strings or rich text.
• ⚔️ Standards-based: Use the best parts of built-in JavaScript APIs and supplemental lower-level APIs from Format.JS.

What does it look like?

This library is based on the premise that messages can be grouped by namespaces (typically a component name).

// UserDetails.tsx
import {useTranslations, useFormatter} from 'next-intl';
 
function UserDetails({user}) {
  const t = useTranslations('UserDetails');
  const format = useFormatter();
 
  return (
    <section>
      <h2>{t('title')}</h2>
      <p>{t('followers', {count: user.followers.length})}</p>
      <p>{t('lastSeen', {time: format.relativeTime(user.lastSeen)})</p>
      <Image alt={t('portrait', {username: user.name})} src={user.portrait} />
    </section>
  );
}

// en.json
{
  "UserDetails": {
    "title": "User details",
    "followers": "{count, plural, ↵
                    =0 {No followers yet} ↵
                    =1 {One follower} ↵
                    other {# followers} ↵
                  }",
    "lastSeen": "Last seen {time}",
    "portrait": "Portrait of {username}"
  }
}

Installation

1. npm install use-intl
2. Add the provider

import {IntlProvider} from 'use-intl';

// You can get the messages from anywhere you like. You can also
// fetch them from within a component and then render the provider 
// along with your app once you have the messages.
const messages = {
  "App": {
    "hello": 'Hello {username}!'
  }
};

function Root() {
  return (
    <IntlProvider messages={messages} locale="en">
      <App user={{name: 'Jane'}} />
    </IntlProvider>
  );
}

function App({user}) {
  const t = useTranslations('App');
  return <h1>{t('hello', {username: user.name})}</h1>;
}

Have a look at the minimal setup example to explore a working app.

Usage

Please refer to the next-intl usage docs for more advanced usage, but note that you should import from use-intl instead of next-intl.