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

.widget {
    width: 202px;
    margin:100px auto;
//    border:1px solid black;
    padding:20px;
}
.name {
    color: red;
}
.default-label {
    border: 1px solid black;
    padding: 10px;
    margin-bottom: 10px;
    width:180px;
}

.green-label {
    border: 1px solid green;
    padding: 10px;
    margin-bottom: 10px;
    width: 180px;
}

.default-input {
    border: 1px solid #eaeaea;
    padding: 10px;
    width:180px;
}

.important-input {
    border: 2px solid red;
    width:180px;
}

img.center {
    width: 100px;
    height: 100px;
    display: block;
    margin: 15px auto;    
}

JavaScript 1.7

class Previewer extends React.Component {
constructor(props) {
    super(props);
    this.state = { value: '' };

    this.updateValue = this.updateValue.bind(this);
  }
  updateValue(val) {
    this.setState ({ value: val });
  }
  markup(text) {
    var markup = marked(text, { sanitize: true });
    return { __html: markup}
  }
  render() {
    return (
      <div className='row'>
        <div className='col-md-6'>
          <Markdown value={this.state.value} updateValue={this.updateValue} />
        </div>
        <div className='col-md-6'>
          <span> In Parent Com : {this.state.value}</span>
        </div>
      </div>
    );
  }
}

class Markdown extends React.Component {
  constructor(props) {
    super(props);

    this.onChange = this.onChange.bind(this);
  }
  onChange(e) {
    var val = e.target.value;
    this.props.updateValue(val);
  }
  render() {
    return (
      <div className={this.props.className}>
        <textarea rows='22' type='text' value={this.props.value} ref='textarea'  className='form-control' onChange={this.onChange} />
      </div>
    );
  }
}

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