Deadweight
Deadweight is used for cleaning unused CSS selectors. You have to hand out a set of your application's style sheets and HTML pages, and it will report which CSS selectors are safe to remove.
The gem won’t work out of the box in Rails, since most pages have dynamic content, but Jason Morrison from Thoughtbot wrote a blog post on how to create a Rack Middleware and integrate it into your test suite to collect all the HTML content in one place.
If you're using precompilers such as Sass or Less, you should compile all of your style sheets and hand them out as simple CSS files to the deadweight task. It is recommended that you remove all the vendor/third-party css files (such as Bootstrap files and similar) since they will end up clogging your output.
Deadweight
Deadweight is used for cleaning unused CSS selectors. You have to hand out a set of your application's style sheets and HTML pages, and it will report which CSS selectors are safe to remove.
The gem won’t work out of the box in Rails, since most pages have dynamic content, but Jason Morrison from Thoughtbot wrote a blog post on how to create a Rack Middleware and integrate it into your test suite to collect all the HTML content in one place.
If you're using precompilers such as Sass or Less, you should compile all of your style sheets and hand them out as simple CSS files to the deadweight task. It is recommended that you remove all the vendor/third-party css files (such as Bootstrap files and similar) since they will end up clogging your output.