Extracting only the css used in a specific page

Question

Say you had a dynamically generated site that has been worked on by too many people, past and present, and you now have a collection of shared stylesheets that contain over

Answer 1

• uncss: Find Unused CSS - cli tool, uses phantomjs and executes JS on the page, can be used on URLs
• grunt-uncss - only works on static files
• (critical css - extracts CSS for elements visible in the browser window)