StyleInliner 
Note
This project is archived because I no longer actively use it, and there seems to be no recent activity from other users either. If you are still using it and would like to take over maintenance, please contact me somewhere.
Inline CSS style rules into style attributes of each HTML element.
Installation
Add this line to your application's Gemfile:
gem "style_inliner"And then execute:
bundleOr install it yourself as:
gem install style_inlinerUsage
html = <<-EOS
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<style>
body {
background-color: red;
}
td {
background-color: blue
}
</style>
</head>
<body>
<table>
<tr>
<td>example</td>
</tr>
</table>
</body>
</html>
EOS
puts StyleInliner::Document.new(html, replace_properties_to_attributes: true).inline<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body style="background-color: red">
<table>
<tr>
<td bgcolor="blue">example</td>
</tr>
</table>
</body>
</html>Ruby version compatibility
StyleInliner is tested on Ruby 2.2.0.
Development
After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/r7kamura/style_inliner.
License
The gem is available as open source under the terms of the MIT License.