React.jsのチュートリアルを触る ref: http://qiita.com/tomato360/items/75e485d0aefe12a837a4

file0.js

var CommentBox = React.createClass({
  handleCommentSubmit: function(comment) {

    var comments = this.state.data;
    var newComments = comments.concat([comment]);
    this.setState({data: newComments});

  },
  getInitialState: function() {
    return {data: []};
  },
  loadCommentsFromServer: function() {
    var data = [
      {"author": "Pete Hunt", "text": "This is one comment"}
    ];
    this.setState({data: data});
  },
  componentDidMount : function() {
    this.loadCommentsFromServer();
  },
  render: function() {
    return (
      <div className="commentBox">
        <h1>CommentForm</h1>
        <CommentList data={this.state.data} />
        <CommentForm onCommentSubmit={this.handleCommentSubmit} />
      </div>
    );
  }
});

file1.js

var CommentList = React.createClass({});
var CommentForm = React.createClass({});

file2.js

React.render(
  <CommentBox />,
  document.getElementById('content')
);