7. module.exports = function(grunt) { grunt.initConfig({ pkg: grunt.file.readJSON('package.json'), clean: { demo: ['build/*'] }, cssmin: { demo: { files: { 'build/css/demo.min.css': [ 'src/css/app.css', 'src/css/style.css' ] } } }, uglify: { demo: { options: { sourceMap: true }, files: { 'build/js/demo.min.js': [ 'src/js/app.js', 'src/js/util.js' ], 'build/asset/underscore/underscore.min.js': [ 'b