How can you identify duplicate CSS rules?

Posted by DanMan on Pro Webmasters See other posts from Pro Webmasters or by DanMan
Published on 2013-11-12T08:51:35Z Indexed on 2013/11/12 10:22 UTC
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css

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optimization

I'm not talking about used/unused here. I have two stylesheets and some rules differ (either in selectors, rules or both) and some are exactly the same.

So I'm looking for a way to extract and move those rules, which are the same in both files, into a third stylesheet.

In other words: an intersection of two stylesheets. Strangely, I couldn't find a software for this. Would have expected this to be a more common problem.

Background, for those who care: I'm converting a desktop website into a mobile one and I've started by duplicating the desktop stylesheet and changing it (throwing stuff out, adding to it).

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