Example gruntfile for react

Gruntfile.js

module.exports = function(grunt) {
  grunt.initConfig({
    watch: {
      files: [
        'src/**/*.js',
        'src/**/*.jsx'
      ],
      tasks: ['browserify']
    },
    browserify: {
      dist: {
        options: {
           transform: [
             ['babelify', {presets: ['es2015', 'react']}]
           ]
        },
        src: ['src/app.js'],
        dest: 'build/app.build.js',
      }
    },
  });
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-browserify');
  grunt.registerTask('default', ['browserify']);
};

package.json

{
  "name": "grunt-example",
  "version": "1.0.0",
  "description": "Grunt example",
  "main": "index.js",
  "dependencies": {},
  "devDependencies": {
    "babel-preset-es2015": "^6.6.0",
    "babel-preset-react": "^6.5.0",
    "babelify": "7.3.0",
    "grunt": "^1.0.1",
    "grunt-babel": "^6.0.0",
    "grunt-browserify": "5.0.0",
    "grunt-contrib-watch": "^1.0.0"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "Internet",
    "Archive"
  ],
  "author": "Richard Caceres",
  "license": "AGPL-3.0"
}