My Browserify & Grunt config for React.js with LESSCSS

Gruntfile.js

module.exports = function(grunt){

	'use strict';

	grunt.initConfig({
		less: {
			bundle: {
				options: {
					compress: true
					,report: 'min'
					,paths: ['less']
				}
				,files: {
					'css/app.min.css': 'less/app.less' //create app.min.css from app.less
				}
			}
		}
		,browserify: {
			js: {
				files: {
					'main.js': ['app/index.js'] //create main.js from app/index.js
				}
				,options: {
					browserifyOptions: {
						debug: true //generates sourcemaps
						,transform: [ 'reactify' ] //support for JSX, etc
					}
				}
			}
		}
		,extract_sourcemap: {
			js: {
				options: {
					'removeSourcesContent': false
				}
				,files: {
					'./': ['main.js'] //extract sourcemap from browserify'd result
				}
			}
		}
		,uglify: {
			js: {
				options: {
					sourceMap: true
					,sourceMapRoot: 'build'
					,sourceMapIncludeSources: true
					,sourceMapIn: 'main.js.map' //use sourcemap from extract_sourcemap
					,mangle: false
				}
				,files: {
					'main.min.js': ['main.js'] //compress main.js to main.min.js
				}
			}
		}
		,clean: {
			js: ["main.js","main.js.map"] //delete main.js and main.js.map intermediate files after we no longer need them
		}
		,watch: {
			js: {
				files: ['app/**/*.js','lib/**/*.js']
				,tasks: ['js_prod'] //when a JS file changes, run the task js_prod
				,options: {
					interrupt: true
					,livereload: true
				}
			}
			,less: {
				files: ['less/*.less']
				,tasks: ['less']
				,options: {
					interrupt: true
					,livereload: true
				}
			}
			,grunt: {
				files: ['Gruntfile.js']
				,options: {
					interrupt: true
				}
			}
		}
	});

	grunt.loadNpmTasks('grunt-browserify');
	grunt.loadNpmTasks('grunt-contrib-clean');
	grunt.loadNpmTasks('grunt-contrib-less');
	grunt.loadNpmTasks('grunt-contrib-uglify');
	grunt.loadNpmTasks('grunt-contrib-watch');
	grunt.loadNpmTasks('grunt-extract-sourcemap');

	//define js_prod for watcher task to use
	grunt.registerTask('js_prod', ['browserify','extract_sourcemap','uglify','clean']);

	grunt.registerTask('default', ['watch']);

};

package.json

{
  "devDependencies": {
    "browserify": "^12.0.1",
    "cssify": "^1.0.2",
    "grunt": "^0.4.5",
    "grunt-browserify": "^4.0.1",
    "grunt-contrib-clean": "^0.6.0",
    "grunt-contrib-less": "^1.1.0",
    "grunt-contrib-uglify": "^0.10.0",
    "grunt-contrib-watch": "^0.6.1",
    "grunt-extract-sourcemap": "^0.1.16",
    "react": "^15.0.1",
    "react-dom": "^15.0.1",
    "react-redux": "^4.4.2",
    "reactify": "^1.1.1",
    "redux": "^3.4.0"
  }
}