use standard polyfills (only tested with esm)

src/editor/index.html

@@ -23,19 +23,9 @@
     <script src="jquery.min.js"></script>
     <!--{endif}-->
 
-    <!-- Lacking browser support -->
-    <script nomodule="" src="redirect-on-no-module-support.js"></script>
-    <script type="module" src="redirect-on-lacking-support.js"></script>
-
     <!-- As yet no ES6 Module support -->
     <script src="jquery-ui/jquery-ui-1.8.17.custom.min.js"></script>
 
-    <!-- Browser polyfills -->
-    <script src="../external/dom-polyfill/dom-polyfill.js"></script>
-
-    <!-- ES6+ polyfills (Babel) -->
-    <script src="../external/core-js-bundle/minified.js"></script>
-    <script src="../external/regenerator-runtime/runtime.js"></script>
 
     <!-- If you do not wish to add extensions by URL, you can add calls
       within the following file to svgEditor.setConfig -->

src/editor/index.js

@@ -18,6 +18,10 @@ For default config and extensions (and available options) available to
 `setConfig()`, see the file `docs/tutorials/ConfigOptions.md`
 */
 
+// eslint-disable-next-line node/file-extension-in-import
+import 'core-js/stable';
+// eslint-disable-next-line node/file-extension-in-import
+import 'regenerator-runtime/runtime';
 import svgEditor from './svgedit.js';
 
 // URL OVERRIDE CONFIG