PR feedback

Author: sam-gc

packages-exp/auth-exp/src/platform_browser/load_js.ts

@@ -25,18 +25,14 @@ function getScriptParentElement(): HTMLDocument | HTMLHeadElement {
 export function _loadJS(url: string): Promise<Event> {
   // TODO: consider adding timeout support & cancellation
   return new Promise((resolve, reject) => {
-    function onError(e: Event | string): void {
-      const errorEvent = e as ErrorEvent;
-      const error =
-        typeof errorEvent !== 'string' && errorEvent.error
-          ? errorEvent.error
-          : _createError(AuthErrorCode.INTERNAL_ERROR);
-      reject(error);
-    }
     const el = document.createElement('script');
     el.setAttribute('src', url);
     el.onload = resolve;
-    el.onerror = onError;
+    el.onerror = e => {
+      const error = _createError(AuthErrorCode.INTERNAL_ERROR);
+      error.customData = e as unknown as Record<string, unknown>;
+      reject(error);
+    };
     el.type = 'text/javascript';
     el.charset = 'UTF-8';
     getScriptParentElement().appendChild(el);