update docs

CHANGELOG.md

@@ -6,6 +6,9 @@ Contributors: please follow the recommendations outlined at [keepachangelog.com]
 ## [Unreleased]
 *Please add entries here for your pull requests.*
 
+### Added
+- Allow using rake task to generate javascript locale files. [#717](https://github.com/shakacode/react_on_rails/pull/717) by [JasonYCHuang](https://github.com/JasonYCHuang).
+
 ### Fixed
 - Upgrade Rails to 4.2.8 to fix security vulnerabilities in 4.2.5. [#735](https://github.com/shakacode/react_on_rails/pull/735) by [hrishimittal](https://github.com/hrishimittal).
 

docs/basics/i18n.md

@@ -4,7 +4,7 @@ Here's a summary of adding the I18n functionality.
 
 You can refer to [react-webpack-rails-tutorial](https://github.com/shakacode/react-webpack-rails-tutorial) and [PR #340](https://github.com/shakacode/react-webpack-rails-tutorial/pull/340) for a complete example.
 
-1. Add `react-intl` & `intl` to `client/package.json`, and remember to `bundle && npm install`.
+1. Add `react-intl` & `intl` to `client/package.json`, and remember to `bundle && yarn install`.
 
   ```js
   "dependencies": {
@@ -44,18 +44,11 @@ You can refer to [react-webpack-rails-tutorial](https://github.com/shakacode/rea
   config.i18n_dir = Rails.root.join("PATH_TO", "YOUR_JS_I18N_FOLDER")
   ```
 
-  Add following lines to `config/application.rb`, this will help you to generate `translations.js` & `default.js` automatically when you starts the server.
+4. Javascript locale files must be generated before `yarn build`. 
+  
+  Once you setup `config.i18n_dir` as in the previous step, react_on_rails will help you to do this.
 
-  ```js
-  module YourModule
-    class Application < Rails::Application
-      ...
-      config.after_initialize do
-        ReactOnRails::LocalesToJs.new
-      end
-    end
-  end
-  ```
+  If you create your own Procfile files, you must add `bundle exec rake react_on_rails:locale` before `yarn build`.
 
 5. In React, you need to initialize `react-intl`, and set parameters for it.