If
you have tested some css code, and when we delete some code, there may be some
css code are not used, if we want to delete these code to decrease the size of
a page, it will spend more time. There are some css check tools can help us to
check if the css code is unused.
1. Dust-Me Selectors
Dust-Me
is a powerful Firefox Plugin, it can spider your page like a google robots,
then check all the css file and css style the page have used, and find the unused
css code.When you open your page or your local file
in Firefox, click the right button of your mouse,
Note: This plugin can’t spider the css that
between <style> and </style> that in your current page.
Learn More:http://www.brothercake.com/dustmeselectors/
2.
Google Page Speed
If
you are using Google Webmaster Tool, you may be reminded to add Page Speed.
This Plugin is based for Firefox famous Plugin Firebug.
You will never regret to use google page speed, it can not just check your css,
it also help you to optimize your page, and increase the speed of your page by
check your image, your js and so on.
Learn More: https://developers.google.com/speed/pagespeed/