Uncss setting with grunt examples

Gruntfile.js

    uncss: {
      dist: {
        options: {
          ignore: [
                    /(#|\.)fancybox(\-[a-zA-Z]+)?/,
                    /expanded/,
                    /js/,
                    /wp-/,
                    /align/,
                    /admin-bar/,
                    // needed for Bootstrap's transitions
                    ".fade",
                    ".fade.in",
                    ".collapse",
                    ".collapse.in",
                    ".navbar-collapse",
                    ".navbar-collapse.in",
                    ".collapsing",
                    // needed for the `<noscript>` warning; remove them when fixed in uncss
                    ".alert-danger",
                    ".visible-xs",
                    ".noscript-warning",
                    // currently only in a IE conditional so uncss doesn't see it
                    // ".close", has error in syntax-opacity
                    ".alert-dismissible",
                    ".open",
                    //theme specific
                    /shrink/,
                    ".navbar-brand-s",
                    // Woocommerce
                    /woocommerce/,
                    // Flexible
                    /module/,
                    ".mod-default",
                    ".mod-primary",
                    ".mod-secondary",
                    ".mod-white",
                    ".mod-gray",
                    ".mod-dark"
                ],
          stylesheets  : ['assets/css/main.min.css'],
          ignoreSheets : [/fonts.googleapis/],
          urls         : [], //Overwritten in load_sitemap_and_uncss task
        },
        files: {
          'assets/css/main.min.css': ['**/*.php']
        }
      }
    }