Philipp

var critical = require('critical');

gulp.task('critical', function (cb) {
  critical.generate({
    base: '_site/',
    src: 'index.html',
    css: ['css/all.min.css'],
    dimensions: [{
      width: 320,
      height: 480
    },{
      width: 768,
      height: 1024
    },{
      width: 1280,
      height: 960
    }],
    dest: '../_includes/critical.css',
    minify: true,
    extract: false,
    ignore: ['font-face']
  });
});

var gulp = require('gulp');
var uncss = require('gulp-uncss');
gulp.task('default', function() {
    gulp.src('site.css')
        .pipe(uncss({
            html: ['index.html', 'about.html']
        }))
        .pipe(gulp.dest('./out'));
});

a	{color: #555;
-moz-text-decoration-color: rgba(85,85,85, 0.3);
text-decoration-color: rgba(85,85,85, 0.1);
}