动态创建较小的css文件

Question

I have searched Stack Overflow and found nothing about this. So here it goes

I was wondering if anyone has created server side script (PHP preferred) that can determine what css rules are required for a page to render. Something that would cross reference the HTML with a set group of css files and recreate a lighter version for a specific page.

Since Googles Update and the importance to render blocking scripts/CSS and to lighten the load I think this would be an awesome script.

Answer 1

I am not sure whether the tool you're asking for exists in its "pure form". The closest thing I'm aware of are unused css removal tools like this one. Such tools would accept a css file and a number of html files and remove css rules, that are not used.

Please not that the tool I've linked is designed to be used at build time, not run time. That means you would want to use it to get rid of unused css before/when you deploy your website, not on every request.