Set up proper library functioning for IE 11.

javascript/package.json

@@ -31,6 +31,10 @@
     "qrcode": "^1.3.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.1.2",
+    "@babel/preset-env": "^7.1.0",
+    "babel-loader": "^8.0.4",
+    "babel-polyfill": "^6.26.0",
     "webpack": "^4.23.1",
     "webpack-cli": "^3.1.2"
   }

javascript/webpack.config.js

@@ -3,10 +3,24 @@ const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 module.exports = {
   mode: 'production',
   entry: {
-    'viamapi-client': './src/viamapi-client.js',
-    'viamapi-iframe': './src/viamapi-iframe.js',
+    'viamapi-client': ['babel-polyfill', './src/viamapi-client.js'],
+    'viamapi-iframe': ['babel-polyfill', './src/viamapi-iframe.js'],
     'wopiapi-iframe': './src/wopiapi-iframe.js'
   },
+  module: {
+    rules: [
+      {
+        test: /\.m?js$/,
+        //exclude: /node_modules/,
+        use: {
+          loader: 'babel-loader',
+          options: {
+            presets: ['@babel/preset-env']
+          }
+        }
+      }
+    ]
+  },
   optimization: {
     minimizer: [
       new UglifyJsPlugin({