i18next-resources-to-backend

Introduction

This package helps to transform resources to an i18next backend. To be used in Node.js, in the browser and for Deno.

Advice:

If you don't like to manage your translation files manually or are simply looking for a better management solution, take a look at i18next-locize-backend — translations served from a hosted CDN instead of bundled with your app. The i18next backend plugin for Locize .

Starting from an app with hardcoded strings? Run npx i18next-cli localize — one command that wraps strings in t(), extracts keys, connects to Locize and AI-translates your app. See the launch post.

Getting started

Source can be loaded via npm.

# npm package
$ npm install i18next-resources-to-backend

simple example - dynamic imports (lazy load in memory translations)

i18next-resources-to-backend helps to transform resources to an i18next backend. This means you can lazy load translations.

The dynamic import must be passed a string. Webpack will fail to load the resource if you pass a variable to import().

For example, when using webpack:

import i18next from 'i18next';
import resourcesToBackend from 'i18next-resources-to-backend';

i18next
  .use(resourcesToBackend((language, namespace) => import(`./locales/${language}/${namespace}.json`)))
  .on('failedLoading', (lng, ns, msg) => console.error(msg);
  .init({ /* other options */ })

used as fallback in combination with another i18next backend

i.e. Browser fallback with local / bundled translations

Wiring up:

import i18next from 'i18next'
import ChainedBackend from 'i18next-chained-backend'
import resourcesToBackend from 'i18next-resources-to-backend'
import HttpBackend from 'i18next-http-backend'

i18next.use(ChainedBackend).init({
    backend: {
      backends: [
        HttpBackend, // if a namespace can't be loaded via normal http-backend loadPath, then the inMemoryLocalBackend will try to return the correct resources
        resourcesToBackend({
            en: {
                translations: {
                    sayHi: 'hello world'
                }
            }
        })
      ],
      backendOptions: [{
        loadPath: 'http://localhost:8080/locales/{{lng}}/{{ns}}.json'
      }]
    }
})

for Deno:

import i18next from 'https://deno.land/x/i18next/index.js'
import ChainedBackend from 'https://deno.land/x/i18next_chained_backend/index.js'
import resourcesToBackend from 'https://deno.land/x/i18next_resources_to_backend/index.js'
import HttpBackend from 'https://deno.land/x/i18next_http_backend/index.js'

i18next.use(ChainedBackend).init({
    backend: {
      backends: [
        HttpBackend, // if a namespace can't be loaded via normal http-backend loadPath, then the inMemoryLocalBackend will try to return the correct resources
        resourcesToBackend({
            en: {
                translations: {
                    sayHi: 'hello world'
                }
            }
        })
      ],
      backendOptions: [{
        loadPath: 'http://localhost:8080/locales/{{lng}}/{{ns}}.json'
      }]
    }
})

you can also lazy load the in memory translations, i.e. when using webpack:

i18next.use(ChainedBackend).init({
    backend: {
      backends: [
        HttpBackend, // if a namespace can't be loaded via normal http-backend loadPath, then the inMemoryLocalBackend will try to return the correct resources
        // with dynamic import, you have to use the "default" key of the module ( https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import#importing_defaults )
        resourcesToBackend((language, namespace) => import(`./locales/${language}/${namespace}.json`))
        // resourcesToBackend((language, namespace, callback) => {
        //     import(`./locales/${language}/${namespace}.json`)
        //         .then(({ default: resources }) => {
        //             callback(null, resources)
        //         })
        //         .catch((error) => {
        //             callback(error, null)
        //         })
        // })
      ],
      backendOptions: [{
        loadPath: 'http://localhost:8080/locales/{{lng}}/{{ns}}.json'
      }]
    }
})

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Gold Sponsors

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From the creators of i18next: localization as a service - locize.com

A translation management system built around the i18next ecosystem - locize.com.

With using Locize you directly support the future of i18next.

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