Gruntfile.js

module.exports = function (grunt) {
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        uglify: {
            mini_src: {
                options: {
                    banner: '/*! <%= pkg.name %>.min.js v<%= pkg.version %> <%= grunt.template.today("yyyy-mm-dd") %> */\n'
                },
                files: {
                    './<%= pkg.name %>.min.js': 'src/<%= pkg.name %>.js'
                }
            }
        },
        less: {
            development: {
                files: {
                    "demo/css/clndr.css": "demo/css/clndr.less"
                }
            },
            production: {
                options: {
                    report: "min",
                    compress: true,
                    sourceMap: true
                },
                files: {
                    "demo/css/clndr.css": "demo/css/clndr.less"
                }
            }
        },
        watch: {
            options: {
                livereload: true
            },
            uglify: {
                files: ['src/*.js'],
                tasks: ['uglify'],
                options: {
                    spawn: false,
                    // Don't call uglify more than once per second
                    debounceDelay: 1000
                }
            },
            less: {
                files: ['demo/css/*.less'],
                tasks: ['less:development']
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-watch');

    grunt.registerTask('default', ['uglify', 'less:development']);
};