Add CustomEvent Pollyfill

js/src/events.js

@@ -6,6 +6,7 @@
 * file that was distributed with this source code.
 */
 
+export * from './events/pollyfill.js';
 export * from './events/utilities.js';
 export * from './events/selections.js';
 export * from './events/editing.js';

js/src/events/pollyfill.js

@@ -0,0 +1,15 @@
+/** https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent  */
+(function () {
+    if (typeof window.CustomEvent === "function") return false; //If not IE
+
+    function CustomEvent(event, params) {
+        params = params || { bubbles: false, cancelable: false, detail: undefined };
+        var evt = document.createEvent('CustomEvent');
+        evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
+        return evt;
+    }
+
+    CustomEvent.prototype = window.Event.prototype;
+
+    window.CustomEvent = CustomEvent;
+})();

js/src/events/utilities.js

@@ -13,7 +13,7 @@ export function gw_postEvent(ev) {
 export function gw_sendEvent(payload) {
 
   const d = $doc.getElementById('eventTransporterDiv');
-  const event = new Event('click');
+  const event = new CustomEvent('click');
   event.payload = payload;
   d.dispatchEvent(event);
 }