Nuxt-i18n: how to load messages asynchronously?

Question

I am building a multilingual Nuxt web app.
Using this example from the official documentation (Codepen link), I no longer want to use local JSON files where my translations are saved to work as defined in the code below:

messages: {
      'en': require('~/locales/en.json'), # I want to get this asynchronously from an HTTP URL
      'fr': require('~/locales/fr.json') # I want to get this asynchronously from an HTTP URL
    }

I wonder what available alternatives to set asynchronously en and fr values by reading the JSON data from a URL instead?

plugins/i18n.js:

import Vue from 'vue'
import VueI18n from 'vue-i18n'

Vue.use(VueI18n)

export default ({ app, store }) => {
  // Set i18n instance on app
  // This way we can use it in middleware and pages asyncData/fetch
  app.i18n = new VueI18n({
    locale: store.state.locale,
    fallbackLocale: 'en',
    messages: {
      'en': require('~/locales/en.json'), # How to get this asynchronously?
      'fr': require('~/locales/fr.json') # # How to get this asynchronously?
    }
  })

  app.i18n.path = (link) => {
    if (app.i18n.locale === app.i18n.fallbackLocale) {
      return `/${link}`
    }

    return `/${app.i18n.locale}/${link}`
  }
}

What I tried:

messages: {
      'en': axios.get(url).then((res) => {        
         return res.data
        } ),
      'fr': require('~/locales/fr.json')
    }

Where url points to the /locals/en.json file which is hosted on my Github profile.

Answer 1

You can use axios with await directly in the constructor:

export default async ({ app, store }) => {
  app.i18n = new VueI18n({ //construction a new VueI18n
    locale: store.state.i18n.locale,
    fallbackLocale: 'de',
    messages: {
      'de': await axios.get('http://localhost:3000/lang/de.json').then((res) => {
        return res.data
      }),
      'en': await axios.get('http://localhost:3000/lang/en.json').then((res) => {
        return res.data
      })
    }
  })
}