0.1.5 • Public • Published


    Inspired by http://i18njs.com/


    npm install --save a-i18n

    const i18n = require('a-i18n')



    const en = i18n({ key: 'my message' })
    const str = en('key')
    console.log(str) // my message


    You can interpolate numbers and strings using %n and %s.

    const en = i18n({ 
      hello: 'Hello %s', 
      unread_messages: 'You have %n unread messages' 
    en('hello', 'World') // Hello World
    en('unread_messages', 4) // You have 4 unread messages

    Interpolation will match by the first argument against the first token of the matching type.

    const en = i18n({
      test: '%s %n %s %s %n'
    en('test', 1, 2, 'a', 'b') // a 1 b %s 2

    Note that the third "%s" was left because no argument matched it.

    TODO Add option for user to specify how it should be handled (e.g. throw exception, replace with blank string, replace with default string specified by user)


    As you noticed in the above example for unread messages, that message wouldn't look very nice if I only had 1 unread message.

    const en = i18n({ 
      unread_messages: [
        [0, 0, 'You have no unread messages'], 
        [1, 1, 'You have %n unread message'], 
        [2, null, 'You have %n unread messages']] 
    en('unread_messages', 1) // You have 1 unread message
    en('unread_messages', 2) // You have 2 unread messages

    Note that pluralization always assumes that the first argument controls pluralization.

    const en = i18n({ 
      any: [
        [0, 0, '%s have no messages.'], 
        [1, null, '%s have messages.']
    en('any', 1, 'You') // This works
    en('any', 'You', 1) // This would look at 'You' and since it is not a number default pluralization to 0

    Names parameters

    const en = i18n({ 
      welcome: 'Welcome %{name}! Your last visit was on %{lastVisit}.' 
    en('welcome', { name: 'Andreas', lastVisit: '2017-01-01' }) // Welcome Andreas! Your last visit was on 2017-01-01.

    Reference other messages

    const en = i18n({ 
      hello: 'Hello %s! ${any_messages}', 
      any_messages: [
        [0, 0, 'You have no messages.'], 
        [1, 1, 'You have %n message.'], 
        [2, null, 'You have %n messages.']
    en('hello', 1, 'Andreas') // Hello Andreas! You have 1 message.

    Multiple languages

    const en = i18n({ hello: 'Hello!' })
    const sv = i18n({ hello: 'Hej!' })

    Planned improvements

    User can add multiple languages and receive correct language string based on browser language.

    // Not final api, only example:
    i18n.addLocale('en', { hello: 'Hello!' })
    i18n.addLocale('sv', { hello: 'Hej! })
    const fn = i18n.formatterForCurrentLocale()
    fn('hello') // Hello! or Hej! depending on locale
    const en = i18n.formatterForLocale('en')
    en('hello') // Hello!

    Add support for type agnostic interpolation

    const en = i18n({ test: 'Hello {}! You are guest {} today.' })
    en('test', 1, 2) // Hello 1! You are guest 2 today.




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    • andreasmcdermott