This component implements the context feature, and exposes the prop called appData to other components. The whole application is going to be wrapped by it.

Provider.jsx

class Provider extends React.Component {
  getChildContext() {
    return {appData: this.props.appData};
  }

  render() {
    return(
      <div>
        {this.props.children}
      </div>
    );
  }
}

Provider.childContextTypes = {
  appData: React.PropTypes.object.isRequired
};