Single-use component example (via @chantastic)

CommentList.jsx

// CommentList.jsx (DATA + PRESENTATION)
// inspired by Michael Chan https://gist.github.com/chantastic/fc9e3853464dffdb1e3c

class CommentList extends React.Component {
  constructor(props) {
    super(props);
    this.state = { comments: [] }
  }
  
  componentDidMount() {
    $.ajax({
      url: "/my-comments.json",
      dataType: 'json',
      success: function(comments) {
        this.setState({comments: comments});
      }.bind(this)
    });
  }
  
  render() {
    return <ul> {this.state.comments.map(renderComment)} </ul>;
  }
  
  renderComment({avatar, author, body}) {
    return <li>{avatar} {author} {body}</li>;
  }
}