text: const appStart = ()=> {
    
    const {render} = ReactDOM;
    
    
    const Parent = React.createClass( {
      render(){
          const {lang} = this.props;
          return (
                  <div>Parent <Child lang={lang}/></div>
         );
      }
    });
  
  
    function Child({lang}){
      return (<div>Child <GrandChild lang={lang}/></div>);
    }
    
     
    function GrandChild({lang}){
      return (<div>Grandchild {lang}</div>);
    }
  
    
  
    
    function App({lang}){
      return (
        <div>
           <h1>Simple tree</h1>
          <Parent lang={lang}/>
        </div>
      );
    }
    render(<App lang='fr'/>, document.querySelector("div#root"));
  }
  
  document.addEventListener('DOMContentLoaded', appStart, false);