Reduce umd bundle size (atlassian#346)

.babelrc

@@ -2,26 +2,25 @@
   "presets": [
     "react",
     "flow",
-    ["env", {
-      "targets": {
-        "browsers": [
-          "ie >= 11",
-          "last 1 Edge version",
-          "last 1 Firefox version",
-          "last 1 Chrome version",
-          "last 1 Safari version",
-          "last 1 iOS version",
-          "last 1 Android version",
-          "last 1 ChromeAndroid version"
-        ]
-      }
-    }]
+    ["env", { "modules": false, "loose": true }]
   ],
   "plugins": [
     "transform-runtime",
     "transform-class-properties",
     "transform-object-rest-spread",
     "transform-export-extensions"
   ],
-  "comments": false
-}
+  "comments": false,
+  "env": {
+    "cjs": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    },
+    "test": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    }
+  }
+}

.browserlistrc

@@ -0,0 +1,8 @@
+ie >= 11
+last 1 Edge version
+last 1 Firefox version
+last 1 Chrome version
+last 1 Safari version
+last 1 iOS version
+last 1 Android version
+last 1 ChromeAndroid version

package.json

@@ -27,8 +27,8 @@
     "typecheck": "flow check",
     "build": "yarn run build:clean && yarn run build:lib && yarn run build:flow && yarn run build:dist",
     "build:clean": "rimraf lib && rimraf dist",
-    "build:dist": "rollup -c && rollup -c --min",
-    "build:lib": "babel src -d lib",
+    "build:dist": "rollup -c && cross-env NODE_ENV=min rollup -c",
+    "build:lib": "cross-env NODE_ENV=cjs babel src -d lib",
     "build:flow": "flow-copy-source --verbose src lib",
     "storybook": "start-storybook -p 9002",
     "build-storybook": "build-storybook -c .storybook -o site",
@@ -52,12 +52,14 @@
     "babel-cli": "^6.26.0",
     "babel-eslint": "^8.2.1",
     "babel-plugin-transform-class-properties": "^6.24.1",
+    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "babel-plugin-transform-export-extensions": "^6.22.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-plugin-transform-runtime": "^6.23.0",
     "babel-preset-env": "^1.6.1",
     "babel-preset-flow": "^6.23.0",
     "babel-preset-react": "^6.24.1",
+    "cross-env": "^5.1.3",
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-15": "^1.0.5",
     "eslint": "^4.15.0",

rollup.config.js

@@ -6,30 +6,35 @@ import uglify from 'rollup-plugin-uglify';
 import babel from 'rollup-plugin-babel';
 import replace from 'rollup-plugin-replace';
 import strip from 'rollup-plugin-strip';
-import yargs from 'yargs';
 
-const args = yargs.argv;
+const min = process.env.NODE_ENV === 'min';
 
 export default {
-  input: './lib/index.js',
+  input: './src/index.js',
   output: {
-    file: `dist/react-beautiful-dnd${args.min ? '.min' : ''}.js`,
+    file: `dist/react-beautiful-dnd${min ? '.min' : ''}.js`,
     format: 'umd',
     name: 'ReactBeautifulDnd',
     globals: { react: 'React' },
   },
   plugins: [
-    babel({ exclude: 'node_modules/**', babelrc: false }),
-    resolve(),
-    commonjs(),
+    babel({
+      exclude: 'node_modules/**',
+      runtimeHelpers: true,
+    }),
+    resolve({
+      extensions: ['.js', '.jsx'],
+    }),
+    commonjs({
+      include: 'node_modules/**',
+    }),
     replace({
       'process.env.NODE_ENV': JSON.stringify('production'),
     }),
     strip({
       debugger: true,
     }),
-  ].concat(
-    args.min ? uglify() : []
-  ),
+    min ? uglify() : {},
+  ],
   external: ['react'],
 };

yarn.lock

@@ -1115,6 +1115,15 @@ babel-plugin-transform-es2015-modules-commonjs@^6.23.0, babel-plugin-transform-e
     babel-template "^6.24.1"
     babel-types "^6.24.1"
 
+babel-plugin-transform-es2015-modules-commonjs@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.0.tgz#0d8394029b7dc6abe1a97ef181e00758dd2e5d8a"
+  dependencies:
+    babel-plugin-transform-strict-mode "^6.24.1"
+    babel-runtime "^6.26.0"
+    babel-template "^6.26.0"
+    babel-types "^6.26.0"
+
 babel-plugin-transform-es2015-modules-systemjs@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-systemjs/-/babel-plugin-transform-es2015-modules-systemjs-6.24.1.tgz#ff89a142b9119a906195f5f106ecf305d9407d23"
@@ -2113,6 +2122,13 @@ create-react-class@^15.6.0:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+cross-env@^5.1.3:
+  version "5.1.3"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.1.3.tgz#f8ae18faac87692b0a8b4d2f7000d4ec3a85dfd7"
+  dependencies:
+    cross-spawn "^5.1.0"
+    is-windows "^1.0.0"
+
 cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
@@ -3828,6 +3844,10 @@ is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
+is-windows@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
+
 [email protected], isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"