grunt-contrib-cssmin - how to remove comments from minified css

Question

Im using cssmin to minify css files.

my config like this:

module.exports = function(grunt) {

    grunt.config.set('cssmin', {
        site: {
            src: ['.tmp/public/concat/site.css'],
            dest: '.tmp/public/min/site.min.css'
        }
    });

    grunt.loadNpmTasks('grunt-contrib-cssmin');
};

But output minified css files has comments. Is it possible to configure cssmin to remove comment from source css files?

Thank you.

How I can see, this functionality not provided in cssmin - https://github.com/gruntjs/grunt-contrib-cssmin/blob/master/tasks/cssmin.js — kabiev, Jan 07 '15 at 18:11

Rigotti · Accepted Answer · 2015-01-07T18:31:37.040

36

Set keepSpecialComments to zero, for removing all comments.

grunt.config.set('cssmin', {
    options: {
        keepSpecialComments: 0
    },
    site: {
        src: ['.tmp/public/concat/site.css'],
        dest: '.tmp/public/min/site.min.css'
    }
});

For future reference: grunt-contrib-cssmin uses clean-css options.

edited Jan 07 '15 at 18:31

answered Jan 07 '15 at 18:25

Rigotti

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28

1

Thank you for the documentation link :) – Sisir Aug 13 '15 at 06:17
1

According to the site, the option was renamed to "specialComments" in 4.0.0, but neither specialComments:0 nor keepSpecialComments:0 seem to work. – 9ilsdx 9rvj 0lo May 23 '17 at 09:03

score 5 · Answer 2 · answered Aug 30 '17 at 12:28

It's an old question but now you can use it like this:

module.exports = function(grunt) {
  grunt.config.set('cssmin', {
    options: {
      level: {
        1: {
          specialComments: 0
        }
      }
    },
    site: {
      src: ['.tmp/public/concat/site.css'],
      dest: '.tmp/public/min/site.min.css'
    }
  });
  grunt.loadNpmTasks('grunt-contrib-cssmin');
};

clean-css #How to apply level 1 & 2 optimizations at the same time?

grunt-contrib-cssmin - how to remove comments from minified css

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