@elsoul/fresh-i18n

@elsoul/fresh-i18n is a simple and flexible internationalization (i18n) plugin for Deno's Fresh framework. It allows you to easily manage multiple languages in your Fresh app using JSON-based translations and locale detection.

Features

• Automatic Locale Detection: Automatically detects the user's language based on request headers or URL parameters.
• Namespace Support: Organize translations by namespaces in JSON files for efficient loading and modularization.
• Simple Hooks API: Use useTranslation() to fetch translations and useLocale() to get or change the current locale.
• Edge-native: Optimized for Deno's edge servers for high performance.
• Dynamic Language Switching: Enables dynamic language switching within your components.

Installation

Install via JSR

import { i18nPlugin } from 'jsr:@elsoul/fresh-i18n'

Install via Deno Land

import { i18nPlugin } from 'https://deno.land/x/fresh_i18n/mod.ts'

Usage

Step 1: Register the Plugin (Updated for Fresh v2)

In your main.ts file, register the plugin, specifying the available locales and default language, along with any namespaces you wish to use.

import { App, fsRoutes, staticFiles, trailingSlashes } from 'fresh'
import { i18nPlugin } from '@elsoul/fresh-i18n'

export const app = new App({
  root: import.meta.url,
})
  .use(staticFiles()) // Serve static files
  .use(trailingSlashes('never')) // Do not add trailing slashes to URLs
  .use(i18nPlugin({
    languages: ['en', 'ja'], // Supported languages
    defaultLocale: 'en', // Default language
    localesDir: './locales', // Directory path to JSON files
  }, ['common', 'homepage'])) // Example of namespace customization

await fsRoutes(app, {
  loadIsland: (path) => import(`./islands/${path}`),
  loadRoute: (path) => import(`./routes/${path}`),
})

if (import.meta.main) {
  await app.listen()
}

Step 2: Create JSON Translation Files

In the locales directory, create folders for each locale and JSON files for each namespace.

Example: locales/en/common.json

{
  "welcome": "Welcome",
  "title": "Home"
}

Example: locales/ja/common.json

{
  "welcome": "ようこそ",
  "title": "ホーム"
}

Step 3: Use Translations in Components

Use the useTranslation() and useLocale() hooks in your components to fetch translations and switch between locales dynamically.

import { useLocale, useTranslation } from '@elsoul/fresh-i18n'

export default function Home() {
  const { t } = useTranslation('common') // Use the "common" namespace
  const { locale, changeLanguage } = useLocale()

  return (
    <div>
      <h1>{t('title')}</h1> {/* Outputs 'Home' or 'ホーム' */}
      <p>{t('welcome')}</p> {/* Outputs 'Welcome' or 'ようこそ' */}
      <p>Current language: {locale}</p>
      <button onClick={() => changeLanguage('en')}>English</button>
      <button onClick={() => changeLanguage('ja')}>日本語</button>
    </div>
  )
}

Step 4: Dynamically Change Language

Use the changeLanguage() function from the useLocale() hook to dynamically switch between languages.

const { changeLanguage } = useLocale()
changeLanguage('ja') // Switch to Japanese

Contributing

Contributions are welcome! Please feel free to submit issues or pull requests on GitHub.

License

This package is open-source and available under the Apache-2.0 License.