old_contents: var React = require('react');
  var classNames = require('classnames');
  
  var AvatarItem = React.createClass({
    propTypes: {
      title: React.PropTypes.string.isRequired,
      image: React.PropTypes.string,
      placeholder: React.PropTypes.string,
      size: React.PropTypes.string
    },
  
    render: function() {
      var title = this.props.title;
      var image = this.props.image;
      var size = this.props.size;
      var placeholderClassName = "avatar__placeholder avatar__placeholder--" + this.props.placeholder;
      var avatarClassName = classNames('avatar', {
        'avatar--small': size == 'small',
        'avatar--tiny': size == 'tiny'
      });
  
      var placeholder = <span className={placeholderClassName}>{title[0]}</span>
  
      var avatar;
      if (image) {
        avatar = <img class="avatar__image" src={image} alt={title}/>
      }
  
      return(
        <div className={avatarClassName}>
          {avatar}
          {placeholder}
        </div>
      );
    }
  });
  
  module.exports = AvatarItem;
  
new_contents: var React = require('react');
  var classNames = require('classnames');
  
  var AvatarItem = React.createClass({
    propTypes: {
      title: React.PropTypes.string.isRequired,
      image: React.PropTypes.string,
      placeholder: React.PropTypes.string,
      size: React.PropTypes.string
    },
  
    render: function() {
      var title = this.props.title;
      var image = this.props.image;
      var size = this.props.size;
      var placeholderClassName = "avatar__placeholder avatar__placeholder--" + this.props.placeholder;
      var avatarClassName = classNames('avatar', {
        'avatar--small': size == 'small',
        'avatar--tiny': size == 'tiny'
      });
  
      var placeholder = <span className={placeholderClassName}>{title[0]}</span>
  
      var avatar;
      if (image) {
        avatar = <img className="avatar__image" src={image} alt={title}/>
      }
  
      return(
        <div className={avatarClassName}>
          {avatar}
          {placeholder}
        </div>
      );
    }
  });
  
  module.exports = AvatarItem;
  
subject: add class to avatar image;