It’s just data


Having determined that Angular.js is overkill for my blog rewrite, I started looking more closely at React.  It occurred to me that I could do better than JSX, so I wrote a Ruby2JS filter.  Compare for yourself.  Excerpt from the React tutorial:

var CommentList = React.createClass({
  render: function() {
    var commentNodes = (comment) {
      return (
        <Comment author={}>
    return (
      <div className="commentList">

Equivalent using the Ruby2JS filter:

class CommentList < React 
  def render
    _div.commentList do
      @@data.forEach do |comment|
        _CommentBlock comment.text, author:

Note: I renamed the Comment class to CommentBlock to avoid a conflict with the existing Comment API.  I wouldn’t have thought that would be necessary, but things didn’t work until I made this change.

Full source for the tutorial reimplemented in Ruby is available.

Problem with Comment has been fixed.  Underlying cause was ruby2js attempting to us an ES6 feature: const.

Posted by Sam Ruby at

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Quite nice this post also! This Ruby2JS commenting idea was trying to implement on a blog about watches and fashion and it work for the moment, but after an upgrade was a little bit tricky, so i will try to do this again, because seems quite useful and cool! Thanks and keep up the great work!

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