revert to webpack config

Author: fayyazarshad

packages/optimizely-sdk/karma.base.conf.js

@@ -23,15 +23,7 @@ module.exports = {
   plugins: ['karma-mocha', 'karma-webpack', require('karma-browserstack-launcher')],
 
   webpack: {
-    module: {
-      loaders: [
-        {
-          test: /\.js$/,
-          loader: 'babel-loader',
-          presets: ['@babel/preset-env'],
-        }
-      ]
-    }
+    mode: 'production',
   },
 
   //browserStack setup

packages/optimizely-sdk/webpack.config.js

@@ -0,0 +1,43 @@
+var path = require('path');
+
+module.exports = [
+  {
+    entry: path.resolve(__dirname, 'lib/index.browser.js'),
+    output: {
+      path: path.resolve(__dirname, 'dist'),
+      filename: 'optimizely.browser.umd.js',
+      library: 'optimizelySdk',
+      libraryTarget: 'umd',
+    },
+    mode: 'none',
+    node: {
+      // set to not polyfill setImmediate in promise polyfill
+      // it is already wrapped in a typeof check
+      setImmediate: false,
+    },
+  },
+  {
+    entry: path.resolve(__dirname, 'lib/index.browser.js'),
+    output: {
+      path: path.resolve(__dirname, 'dist'),
+      filename: 'optimizely.browser.umd.min.js',
+      library: 'optimizelySdk',
+      libraryTarget: 'umd',
+    },
+    mode: 'production',
+    node: {
+      // set to not polyfill setImmediate in promise polyfill
+      // it is already wrapped in a typeof check
+      setImmediate: false,
+    },
+    module: {
+      loaders: [
+        {
+          test: /\.js$/,
+          loader: 'babel-loader',
+          presets: ['@babel/preset-env'],
+        }
+      ]
+    }
+  },
+];