text: 'use strict';
  
  const e = React.createElement;
  
  class LikeButton extends React.Component {
    constructor(props) {
      super(props);
      this.state = { liked: false };
    }
  
    render() {
      if (this.state.liked) {
        return 'You liked comment number ' + this.props.commentID;
      }
  
      return e(
        'button',
        { onClick: () => this.setState({ liked: true }) },
        'Like'
      );
    }
  }
  
  // Find all DOM containers, and render Like buttons into them.
  document.querySelectorAll('.like_button_container')
    .forEach(domContainer => {
      // Read the comment ID from a data-* attribute.
      const commentID = parseInt(domContainer.dataset.commentid, 10);
      ReactDOM.render(
        e(LikeButton, { commentID: commentID }),
        domContainer
      );
    });