redux-pagan

managing internationalization via redux

(see react-pagan demo)

Setup redux store

Include i18n reducer in redux:

import { i18n } from 'redux-pagan';

const createStoreWithMiddleware = applyMiddleware(
  thunk
)(createStore);

const rootReducer = combineReducers({
  i18n
});

const store = createStoreWithMiddleware(rootReducer);
...

Loading lang data

import { loadLang } from 'redux-pagan';

function getLangData(locale) {
  // here we use promise-loader to load lang data by demand
  return require('promise?global,[name].i18n!json!./i18n/' + locale + '.i18n.json');
}

@connect(...)
class App extends Component {
  componentDidMount() {
    this.props.dispatch(loadLang(cookie.get('lang') || 'en-US', getLangData));
  }
  
  render() {
    return (
      <select onChange={this.handleLocaleChange}
              value={this.props.locale}>
        <option value='en-US'>en-US</option>
        <option value='ru-RU'>ru-RU</option>
        <option value='fi-FI'>fi-FI</option>
      </select>
    );
  }
  
  handleLocaleChange = e => {
    this.props.dispatch(loadLang(e.target.value, getLangData));
  }
}

Using lang data

i18n.get(...path) is a special method that safely obtains strings from lang data. If no strings were found on stated path, last key is returned. This method's calling is chainable:

i18n.get('some', 'path', 'to')('lang', 'string')

Every call is memoized. To receive string value from last call, use .toString() or .s property (it's also smart enough to be used as React element without calling .toString() or .s - NB: for this to work, you'll need a Symbol polyfill)

// in this case lang data looks like:
//  {
//    "app": {
//      "some": {
//        "text": "foobar"
//      },
//      "element": {
//        "something": {
//          "else": "foobar"
//        }
//      }
//    }
//  }

import { connect } from 'react-redux';

@connect(state => ({
  lang: state.i18n.get('app'),
  locale: state.i18n.locale
}))
class App extends Component {
  render() {
    // string methods are proxied, no need to call .toString() either
    const str = this.props.lang('some', 'text').replace('foo', 'bar');

    return (
      <div>
        {this.props.lang('some', 'text')}
        <Element lang={this.props.lang('element')} />
      </div>
    );
  }
}

class Element extends Component {
  render() {
    return (
      <div>
        {this.props.lang('something', 'else')}
      </div>
    );
  }
}