How do I identify and eliminate unused CSS styles from my bloated stylesheet?

Question

I have a legacy stylesheet that is now full of unused styles. The problem is identifying the necessary from the unnecessary. Are there any tools to help with this?

Answer 1

Remove Unused CSS automatically using Grunt

Gruntfile.js

module.exports = function (grunt) {

    grunt.initConfig({
        uncss: {
            dist: {
                files: [
                    { src: 'index.html', dest: 'css/test.css' }
                ]
            }
        },
      cssmin: {
            dist: {
                files: [
                    { src: 'css/test.css', dest: 'cleancss/testmin.css' }
                ]
            }
        }
    });

    // Load the plugins
    grunt.loadNpmTasks('grunt-uncss');
    grunt.loadNpmTasks('grunt-contrib-cssmin');

    // Default tasks.
    grunt.registerTask('default', ['uncss', 'cssmin']);

};