Add ES Modules build

.babelrc

@@ -1,5 +1,17 @@
 {
   "presets": [
-    "es2015"
-  ]
-}
+    [
+      "es2015", {
+        "loose": true,
+        "modules": false
+      }
+    ]
+  ],
+  "env": {
+    "commonjs": {
+      "plugins": [
+        ["transform-es2015-modules-commonjs", { "loose": true }]
+      ]
+    }
+  }
+}

.gitignore

@@ -2,3 +2,6 @@
 npm-debug.log
 
 /docs/
+
+es
+lib

package.json

@@ -35,24 +35,35 @@
     "identity"
   ],
   "scripts": {
-    "build": "webpack -p",
+    "clean": "rimraf lib es",
+    "build:commonjs": "cross-env BABEL_ENV=commonjs babel src --out-dir lib",
+    "build:es": "cross-env BABEL_ENV=es babel src --out-dir es",
+    "build:umd": "cross-env BABEL_ENV=commonjs NODE_ENV=development webpack dist/amazon-cognito-identity.js",
+    "build:umd:min": "cross-env BABEL_ENV=commonjs NODE_ENV=production webpack dist/amazon-cognito-identity.min.js",
+    "build": "npm run clean && npm run build:commonjs && npm run build:es && npm run build:umd && npm run build:umd:min",
     "doc": "jsdoc src -d docs",
     "lint": "eslint src"
   },
-  "main": "dist/amazon-cognito-identity.min.js",
+  "main": "lib/index.js",
+  "module": "es/index.js",
+  "jsnext:main": "es/index.js",
   "types": "./index.d.ts",
   "dependencies": {
     "aws-sdk": "^2.6.0"
   },
   "devDependencies": {
+    "babel-cli": "^6.23.0",
     "babel-core": "^6.13.2",
     "babel-loader": "^6.2.4",
-    "babel-preset-es2015": "^6.13.2",
+    "babel-plugin-transform-es2015-modules-commonjs": "^6.23.0",
+    "babel-preset-es2015": "^6.22.0",
+    "cross-env": "^3.1.4",
     "eslint": "^3.3.1",
     "eslint-config-airbnb-base": "^5.0.2",
     "eslint-import-resolver-webpack": "^0.5.1",
     "eslint-plugin-import": "^1.13.0",
     "jsdoc": "^3.4.0",
+    "rimraf": "^2.5.4",
     "webpack": "^1.13.1"
   }
 }

webpack.config.js

@@ -18,15 +18,12 @@ var banner = '/*!\n' +
 ' * limitations under the License. \n' +
 ' */\n\n';
 
-module.exports = {
+var config = {
   entry: './enhance',
   output: {
-    path: 'dist',
-    filename: 'amazon-cognito-identity.min.js',
     libraryTarget: 'umd',
     library: 'AmazonCognitoIdentity'
   },
-  devtool: 'source-map',
   externals: {
     // This umd context config isn't in configuration documentation, but see example:
     // https://github.com/webpack/webpack/tree/master/examples/externals
@@ -45,11 +42,6 @@ module.exports = {
   },
   plugins: [
     new webpack.optimize.OccurrenceOrderPlugin(),
-    new webpack.optimize.UglifyJsPlugin({
-      compress: {
-        warnings: false
-      }
-    }),
     new webpack.BannerPlugin(banner, { raw: true })
   ],
   module: {
@@ -65,3 +57,16 @@ module.exports = {
     ]
   }
 };
+
+if (process.env.NODE_ENV === 'production') {
+  config.devtool = 'source-map';
+  config.plugins.push(
+    new webpack.optimize.UglifyJsPlugin({
+      compress: {
+        warnings: false
+      }
+    })
+  );
+}
+
+module.exports = config;