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multi-lang-lib

v1.1.0

Published

A simple multilingual utility for JS/TS apps

Readme

🌍 MultiLang

A lightweight multilingual utility for JavaScript/TypeScript applications.

Лёгкая утилита для мультиязычности в приложениях на JavaScript/TypeScript.


✨ Features / Возможности

  • ✅ Easy language switching
  • 🔁 Fallback logic (e.g., ru_BYruen)
  • 📚 Nested dictionary support
  • 🧠 Variable substitution in strings
  • 🌐 Built-in number, date and relative time formatting

🚀 Installation / Установка

npm install multi-lang-lib

🛠 Usage / Использование

import { MultiLang } from 'multi-lang-lib';

const i18n = new MultiLang(
  { initial: 'en', debug: true },
  {
    en: {
      greeting: "Hello, {name}",
      menu: { settings: { title: "Settings" } }
    },
    ru: {
      greeting: "Привет, {name}"
    },
    ru_RU: {
      greeting: "Здорово, {name}"
    }
  }
);

i18n.setLang('ru_RU');

console.log(i18n.get('greeting', undefined, { name: 'Артем' }));
// → Здорово, Артем

console.log(i18n.get('menu.settings.title'));
// → Settings (fallback to 'en')

🌍 Formatters / Форматирование

formatNumber()

i18n.setLang('fr-FR');
i18n.formatNumber(1234567.89); // → "1 234 567,89"

i18n.formatNumber(1234.56, { style: 'currency', currency: 'EUR' });
// → "1 234,56 €"

formatDate()

i18n.formatDate(new Date(), { dateStyle: 'long' });
// → "8 avril 2025"

formatRelative()

i18n.formatRelative(-1, 'day'); // → "yesterday" / "вчера"

📘 API Reference / Документация

| Method | Description (EN) | Описание (RU) | |-----------------------|--------------------------------------------------------|-------------------------------------------| | setLang(lang) | Set current language | Установить текущий язык | | getLang() | Get current language | Получить текущий язык | | addLang(lang, data) | Add or update language | Добавить или обновить язык | | get(key) | Get translated string with optional variables | Получить перевод по ключу | | has(key) | Check if key exists | Проверить, существует ли ключ | | listKeys(lang?) | Get all available keys for a language | Получить список всех ключей | | formatNumber() | Format numbers using locale | Форматировать числа по локали | | formatDate() | Format date using locale | Форматировать дату по локали | | formatRelative() | Format relative time using locale | Относительное форматирование времени |


🔪 Tests / Тесты

npm test

🛆 Build / Сборка

npm run build

📄 License / Лицензия

MIT © Артем Баженов (IcrusaI)