React Hello World Example with ES6+JSX

A basic Hello World widget with in browser JSX transformed + ES6 support

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/JSXTransformer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/react-with-addons.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>
<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

CSS

textarea {height:400px;width:400px}

JavaScript 1.7

class TextArea extends React.Component {
	constructor(props){
  	super(props);
    this.state = {
    	comment:'He oppose at thrown desire of no. Announcing impression unaffected day his are unreserved indulgence.She oppose at thrown desire of no. Announcing impression unaffected day her are unreserved indulgence.'
    };
    this.onClickMakeBold = this.onClickMakeBold.bind(this);
  }
  
  render(){
  	return <div>
       <button onMouseDown={this.onClickMakeBold}>Bold</button> 
         <div>
           <textarea ref="textarea">{this.state.comment}</textarea>
        </div>
    </div>
  }
  
  onClickMakeBold(event){
  event.preventDefault();
  	console.log(getSelectionText()) 
  }
}
function getSelectionText() {
    var text = "";
    if (window.getSelection) {
        text = window.getSelection().toString();
    } else if (document.selection && document.selection.type != "Control"){
        text = document.selection.createRange().text;
    }else{
     		alert('no')
    }
    return text;
}

React.render(<TextArea />, document.getElementById('container'));