javascript - how to render child components in react.js recursively

Question

I wanted to recursively add a react component from within its own component. I saw this example of a tree component which was mapping through the child TreeNodes and adding child nodes in the same way. Unfortunately it doesn't work at all for me. The idea was to have a simple comment component, and the replies would reuse the same component.

var Comment = React.createClass({
  render: function() {    
    return (
        <div className="comment">

          {/* text and author */}
          <div className="comment-text">
            <span className="author">{this.props.author}</span>         
            <span className="body" dangerouslySetInnerHTML={{__html: this.props.body}} />
          </div>

          {/* replies */}
          <div className="replies">
           {
             this.props.replies.map(function(reply) {
               <Comment body={reply.body} author={reply.author} />
             }.bind(this))
          }
          </div>

      </div>
    );
  }
});

I get the following error message:

Uncaught TypeError: Failed to construct 'Comment': Please use the 'new' operator, this DOM object constructor cannot be called as a function.

here is an example of the JSON data passed to the component.

{ "author" : "Some user",
  "body" : "<div>Great work</div>",
  "replies" : [ { "author" : "A user replying",
        "body" : "<div Yes it was great work</div>"
      },
      { "author" : "Another user replying",
        "body" : "<div It really was great work!</div>"
      }
    ]
}

Answer 1

Here's an alternative in ES6:

import React, { Component, PropTypes } from 'react'

export default class Comments extends Component {

  render() {

    const { children } = this.props

    return (
      <div className="comments">
        {children.map(comment =>
          <div key={comment.id} className="comment">
            <span>{comment.content}</span>
            {comment.children && <Comments children={comment.children}/>}
          </div>
        )}
      </div>
    )

  }

}

Comments.propTypes = {
  children: PropTypes.array.isRequired
}

And is some other component:

<Comments children={post.comments}/>