PageDown for the Rails asset pipeline.

Add this line to the assets group in your Gemfile:

gem 'pagedown-rails', '~> 1.1.3'

Add the necessary libraries to app/assets/javascripts/application.js:

//= require markdown.converter
//= require markdown.sanitizer
//= require markdown.editor

Add the necessary libraries to app/assets/stylesheets/application.css:

/*
 *= require markdown
 */

var converter = Markdown.getSanitizingConverter();
var editor = new Markdown.Editor(converter);
editor.run();

<div class='wmd-panel'>
  <div id='wmd-button-bar'></div>
  <textarea class='wmd-input'></textarea>
</div>

• markdown.converter
• markdown.sanitizer
• markdown.editor
• css styles

Copyright Richard Hubers, released under the MIT License.