♻️ use rollup instead of webpack

allow build process to generate esm and umd packages

package.json

@@ -15,22 +15,25 @@
   },
   "license": "MIT",
   "scripts": {
-    "serve": "rimraf dist && webpack --watch",
-    "build": "rimraf dist && webpack -p",
+    "serve": "rimraf dist && NODE_ENV=development rollup -c --watch",
+    "build": "rimraf dist && NODE_ENV=production rollup -c && NODE_ENV=production DISABLE_BABEL=yes rollup -c",
     "test": "jest",
     "lint": "standard 'src/**'"
   },
-  "module": "src/index.js",
+  "main": "dist/maska.umd.js",
+  "module": "dist/maska.esm.js",
+  "unpkg": "dist/maska.umd.js",
+  "jsdelivr": "dist/maska.umd.js",
   "devDependencies": {
     "@babel/core": "^7.7.5",
     "@babel/preset-env": "^7.7.5",
     "babel-jest": "^24.9.0",
-    "babel-loader": "^8.0.6",
     "jest": "^24.9.0",
     "rimraf": "^3.0.0",
-    "standard": "^14.3.1",
-    "webpack": "^4.41.2",
-    "webpack-cli": "^3.3.10"
+    "rollup": "^2.0.2",
+    "rollup-plugin-babel": "^4.4.0",
+    "rollup-plugin-terser": "^5.3.0",
+    "standard": "^14.3.1"
   },
   "browserslist": "> 0.25%, ie 11",
   "babel": {

rollup.config.js

@@ -0,0 +1,54 @@
+import babel from 'rollup-plugin-babel';
+import { terser } from "rollup-plugin-terser";
+const { version } = require('./package.json')
+
+const isProduction = process.env.NODE_ENV === 'production'
+const useBabel = process.env.DISABLE_BABEL !== 'yes'
+
+const banner = `/*!
+ * maska v${version}
+ * (c) 2019-${(new Date()).getFullYear()} Alexander Shabunevich
+ * Released under the MIT License.
+ */`
+
+const getDistFolder = (fileName = '') => `dist/${useBabel ? '' : 'es6/'}${fileName}`
+const makeFileName = (format) => getDistFolder(`maska.${format}.js`)
+
+const makeOutputConfig = (format = true) => {
+  return {
+    banner,
+    format,
+    file: makeFileName(format),
+    name: 'Maska'
+  }
+}
+
+const plugins = [
+  useBabel && babel({
+    exclude: 'node_modules/**'
+  }),
+  isProduction && terser()
+].filter(Boolean)
+
+
+export default {
+  input: 'src/index.js',
+  plugins,
+  output: [
+    {
+      ...makeOutputConfig('esm')
+    },
+    {
+      ...makeOutputConfig('umd'),
+      exports: 'named',
+    },
+    {
+      ...makeOutputConfig('umd'),
+      file: getDistFolder('maska.js'),
+      exports: 'named',
+    },
+  ],
+  watch: {
+    exclude: 'node_modules/**'
+  }
+};

webpack.config.js

@@ -1,25 +0,0 @@
-const prod = process.env.NODE_ENV === 'production'
-
-module.exports = {
-  mode: prod ? 'production' : 'development',
-  output: {
-    filename: 'maska.js',
-    library: 'Maska',
-    libraryTarget: 'umd',
-    umdNamedDefine: true
-  },
-  module: {
-    rules: [
-      {
-        test: /\.m?js$/,
-        exclude: /(node_modules|bower_components)/,
-        use: {
-          loader: 'babel-loader',
-          options: {
-            presets: ['@babel/preset-env']
-          }
-        }
-      }
-    ]
-  }
-}