ref(browser): Remove optional chaining (#4290)

Author: AbhiPrasad

packages/browser/src/integrations/trycatch.ts

@@ -232,7 +232,7 @@ export class TryCatch implements Integration {
          */
         const wrappedEventHandler = (fn as unknown) as WrappedFunction;
         try {
-          const originalEventHandler = wrappedEventHandler?.__sentry_wrapped__;
+          const originalEventHandler = wrappedEventHandler && wrappedEventHandler.__sentry_wrapped__;
           if (originalEventHandler) {
             originalRemoveEventListener.call(this, eventName, originalEventHandler, options);
           }

packages/browser/src/integrations/useragent.ts

@@ -28,12 +28,12 @@ export class UserAgent implements Integration {
         }
 
         // grab as much info as exists and add it to the event
-        const url = event.request?.url || global.location?.href;
+        const url = (event.request && event.request.url) || (global.location && global.location.href);
         const { referrer } = global.document || {};
         const { userAgent } = global.navigator || {};
 
         const headers = {
-          ...event.request?.headers,
+          ...(event.request && event.request.headers),
           ...(referrer && { Referer: referrer }),
           ...(userAgent && { 'User-Agent': userAgent }),
         };

packages/browser/src/transports/utils.ts

@@ -58,13 +58,14 @@ export function getNativeFetchImplementation(): FetchImpl {
   const document = global.document;
   let fetchImpl = global.fetch;
   // eslint-disable-next-line deprecation/deprecation
-  if (typeof document?.createElement === `function`) {
+  if (document && typeof document.createElement === `function`) {
     try {
       const sandbox = document.createElement('iframe');
       sandbox.hidden = true;
       document.head.appendChild(sandbox);
-      if (sandbox.contentWindow?.fetch) {
-        fetchImpl = sandbox.contentWindow.fetch;
+      const contentWindow = sandbox.contentWindow;
+      if (contentWindow && contentWindow.fetch) {
+        fetchImpl = contentWindow.fetch;
       }
       document.head.removeChild(sandbox);
     } catch (e) {