i18n-js

What is i18n-js?

The i18n-js npm package is a lightweight internationalization library for JavaScript. It allows developers to easily manage translations and localization in their applications. The package supports features like translation lookup, interpolation, pluralization, and more.

What are i18n-js's main functionalities?

Translation Lookup

This feature allows you to look up translations based on the current locale. You can define translations for different languages and switch between them easily.

const I18n = require('i18n-js');
I18n.translations = {
  en: { greeting: 'Hello' },
  fr: { greeting: 'Bonjour' }
};
I18n.locale = 'en';
console.log(I18n.t('greeting')); // Output: 'Hello'
I18n.locale = 'fr';
console.log(I18n.t('greeting')); // Output: 'Bonjour'

Interpolation

Interpolation allows you to insert dynamic values into your translations. This is useful for personalizing messages or including variable data in your translations.

const I18n = require('i18n-js');
I18n.translations = {
  en: { greeting: 'Hello, %{name}' }
};
I18n.locale = 'en';
console.log(I18n.t('greeting', { name: 'John' })); // Output: 'Hello, John'

Pluralization

Pluralization allows you to handle different translations based on the count of items. This is useful for correctly displaying singular and plural forms of words.

const I18n = require('i18n-js');
I18n.translations = {
  en: { messages: { one: 'You have 1 message', other: 'You have %{count} messages' } }
};
I18n.locale = 'en';
console.log(I18n.t('messages', { count: 1 })); // Output: 'You have 1 message'
console.log(I18n.t('messages', { count: 5 })); // Output: 'You have 5 messages'

Other packages similar to i18n-js

react-i18next

react-i18next is a powerful internationalization framework for React applications. It is built on top of i18next and provides seamless integration with React components. Compared to i18n-js, react-i18next offers more advanced features and better support for React-specific use cases.

polyglot

Polyglot is a simple internationalization library for JavaScript. It provides basic translation and interpolation features. While it is less feature-rich compared to i18n-js, it is lightweight and easy to use for smaller projects.

i18next

i18next is a comprehensive internationalization framework for JavaScript. It supports a wide range of features including translation, interpolation, pluralization, and more. i18next is more feature-rich and flexible compared to i18n-js, making it suitable for larger and more complex projects.

README

i18n-js

Just the javascript library taken from the excellent Ruby on Rails i18n-js gem.