Question

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Tool to identify unused css definitions

Lets say I have a page displayed in my browser and I have a .CSS file used on this page with rules like

    .class1{
    /* some style definitions */
    }
    .class2{
    /* some style definitions */
    }
    .class3{
    /* some style definitions */
    }
....
...
.class1001{
    /* some style definitions */
    }

Now my question is is there any addon which would tell me like out of these rules, which are “NOT USED” on the page..

I saw some related questions which provide links to addon that tell CSS selectors which are used on a page..But I have like 1000+ rules and hence want to directly know RULES which are NOT used..

JUST TO ADD, the addons mentioned have 1 issue;
Like if there are hacks for IE (e.g. *html), it marks them as UNUSED, even though it is actually used in IE. Is there any workaround for this ?

Please help me. Thank you.

Answer 1

If you use Firefox, you can use the Dust Me Selectors plugin that does exactly what you asked for. It finds unused Selectors for you 🙂 Give it a try!

Also there is the CSS Usage plugin, that looks over your CSS file and tells you which ones are not being used. 🙂