var CommentForm = React.createClass({
      handleSubmit: function(e) {
        e.preventDefault();
        var author = React.findDOMNode(this.refs.author).value.trim();
        var text = React.findDOMNode(this.refs.text).value.trim();
        if (!text || !author) {
          return;
        }
        // TODO: send request to the server
        React.findDOMNode(this.refs.author).value = '';
        React.findDOMNode(this.refs.text).value = '';
        return;
      },render: function() {
        return (
        <form className="commentForm" onSubmit={this.handleSubmit}>
        <input type="text" placeholder="Your name" ref="author" />
        <input type="text" placeholder="Say something..." ref="text" />
        <input type="submit" value="Post" />
        </form>
      );
      }
    });

而second one在React组件中使用状态：

var TodoTextInput = React.createClass({
  getInitialState: function() {
    return {
      value: this.props.value || ''
    };
  },render: function() /*object*/ {
    return (
      <input className={this.props.className}
      id={this.props.id}
      placeholder={this.props.placeholder}
      onBlur={this._save}
      value={this.state.value}
      />
    );
  },_save: function() {
      this.props.onSave(this.state.value);
      this.setState({value: ''
    });
  });

我看不出两种选择的利弊，如果有的话。
谢谢。