app.jsx

var React = require('react');

var App = React.createClass({
  getInitialState: function() {
    return { members: [] };
  },
  onClick: function() {
    this.setState({
      members: ['黄前久美子', '加藤葉月', '川島緑輝', '高坂麗奈']
    });
  },
  render: function() {
    var members = this.state.members.map(function(member) {
      return <li>{member}</li>;
    });
    return (
      <div>
        <button onClick={this.onClick}>響け!ユーフォニアム</button>
        <ul>
          {members}
        </ul>
      </div>
    );
  }
});

React.render(<App />, document.getElementById('app-container'));