Webpacker and I18n

README.md

$ rails new my-i8n --webpack

Gemfile

gem 'i18n-js'

$ bundle --binstubs
$ yarn add i18n-js
$ bin/rails webpacker:install:erb

app/javascript/i18n-js/index.js.erb

import I18n from "i18n-js"
I18n.translations = <%= I18n::JS.filtered_translations.to_json %>;
export default I18n

app/javascript/packs/application.js

import I18n from 'i18n-js/index.js.erb'
console.log(I18n.t('hello'))

$ bin/rails g controller welcome index

config/routes.rb

root 'welcome#index'

app/views/layouts/application.html.erb

<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>

$ bin/rails s