This gem bundles the contents of the Autosize Plugin from Jack Moore

Autosize is a small, stand-alone script to automatically adjust textarea height to fit text.

The autosize function accepts a single textarea element, or an array or array-like object (such as a NodeList or jQuery collection) of textarea elements.

// from a NodeList
autosize(document.querySelectorAll('textarea'));

// from a single Node
autosize(document.querySelector('textarea'));

// from a jQuery collection
autosize($('textarea'));

See the project page for documentation, caveats, and a demonstration.

add gem 'autosize' to your Gemfile (and then run bundle install).

And in your application.js: //= require autosize

1. Fork it.
2. Create a branch (git checkout -b my_markup)
3. Commit your changes (git commit -am "Cool new feature")
4. Push to the branch (git push origin my_markup)
5. Open a [Pull Request][1]
6. Enjoy a refreshing 'Insert Favorite Beverage' and wait