react.js-06-propTypes类型校验

  var data = 123;  var MyTitle = React.createClass({    propTypes: {      title: React.PropTypes.string.isRequired,    },    render: function() {      return <h1> {this.props.title} </h1>;    }  });  ReactDOM.render(    <MyTitle title={data} />,    document.body  );