@leanera/vue-i18n

Lightweight internationalization plugin for Vue.

Key Features

• 🔃 Reactive locale messages – perfect for lazily added messages
• 🗜 Composable usage with useI18n
• 📯 Global properties $t and $i18n accessible in templates

Setup

# pnpm
pnpm add @leanera/vue-i18n

# npm
npm i @leanera/vue-i18n

Usage

📖 Check out the playground

To make use of @leanera/vue-i18n in your components, initialize the i18n instance:

// plugins/i18n.ts
import { createI18n } from '@leanera/vue-i18n'

const i18n = createI18n({
  defaultLocale: 'en',
  messages: {
    en: {
      intro: 'Welcome, {name}',
    },
    de: {
      intro: 'Willkommen, {name}',
    },
  },
})

export default i18n

Inside your app's entry point, import the i18n instance and add it you Vue:

// main.ts
import { createApp } from 'vue'
import i18n from './i18n'

const app = createApp(App)
app.use(i18n)
app.mount('#app')

Done! Now you can retrieve translated keys in your components:

const i18n = useI18n()
const { locale, t, setLocale } = i18n

locale.value // `en`
t('intro', { name: 'John' }) // `Welcome, John`

// Set new locale
setLocale('de')

locale.value // `de`
t('intro', { name: 'John' }) // `Willkommen, John`

Message Formatting

General Formatting

const messages = {
  en: {
    intro: 'Hello World',
  },
}

Template

<p>{{ $t('intro') }}</p>

Output

<p>Hello World</p>

Named Formatting

const messages = {
  en: {
    intro: '{msg} World'
  }
}

Template

<p>{{ $t('intro', { msg: 'My' }) }}</p>

Output

<p>My World</p>

List Formatting

const messages = {
  en: {
    intro: '{0} World',
  },
}

Template

<p>{{ $t('intro', ['My']) }}</p>

Output

<p>My World</p>

List formatting also accepts array-like objects:

Template

<p>{{ $t('intro', {'0': 'My'}) }}</p>

Output

<p>My World</p>

API

$t & $i18n

The properties $t as well as $i18n are available globally in your templates.

Example:

<p>{{ $t('intro') }}</p>

useI18n

Instead of $t and $i18n you can import the useI18n composable to access the current i18n instance. The useI18n composable is available in the setup hook (entry point for Composition API usage).

Types

function useI18n(): UseI18n

interface UseI18n {
  defaultLocale: string
  locale: ComputedRef<string>
  locales: readonly string[]
  messages: LocaleMessages
  t: (key: string, params?: Record<string, any>) => string
  setLocale: (locale: string) => void
  getLocale: () => string
}

Example

import { useI18n } from '@leanera/vue-i18n'

const i18n = useI18n()
const {
  defaultLocale,
  locale,
  locales,
  messages,
  t,
  setLocale,
  getLocale
} = i18n

console.log(defaultLocale === locale.value) // true
console.log(t('foo').value) // `bar`

💻 Development

1. Clone this repository
2. Enable Corepack using corepack enable
3. Install dependencies using pnpm install
4. Start development server using pnpm run dev inside playground

License

MIT License © 2022-2023 LeanERA GmbH & Johann Schopplich

MIT License © 2020 webkong