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Author: BYK

dev-packages/e2e-tests/test-applications/nextjs-15-spotlight/app/page.tsx

@@ -13,6 +13,10 @@ const INTERNAL_SPOTLIGHT_GLOBAL = typeof globalThis !== 'undefined' ? globalThis
 const MANUAL_SPOTLIGHT_GLOBAL = typeof globalThis !== 'undefined' ? globalThis._sentrySpotlightManual : 'globalThis undefined';
 // @ts-expect-error - accessing SDK debug info
 const SDK_DEBUG_INFO = typeof globalThis !== 'undefined' ? globalThis._sentrySpotlightDebug : undefined;
+// @ts-expect-error - accessing init marker
+const INIT_CALLED = typeof globalThis !== 'undefined' ? globalThis._sentryNextjsInitCalled : undefined;
+// @ts-expect-error - accessing init timestamp
+const INIT_TIMESTAMP = typeof globalThis !== 'undefined' ? globalThis._sentryNextjsInitTimestamp : undefined;
 
 export default function SpotlightTestPage() {
   const [spotlightEnabled, setSpotlightEnabled] = useState<boolean | null>(null);
@@ -56,6 +60,8 @@ export default function SpotlightTestPage() {
 
       <div data-testid="sdk-debug">
         <h2>SDK Debug Info (what SDK saw during init)</h2>
+        <p>init() called: {String(INIT_CALLED)}</p>
+        <p>init() timestamp: {String(INIT_TIMESTAMP)}</p>
         <pre>{SDK_DEBUG_INFO ? JSON.stringify(SDK_DEBUG_INFO, null, 2) : 'No debug info'}</pre>
       </div>
 

packages/nextjs/src/client/index.ts

@@ -52,6 +52,12 @@ declare const __SENTRY_TRACING__: boolean;
 
 /** Inits the Sentry NextJS SDK on the browser with the React SDK. */
 export function init(options: BrowserOptions): Client | undefined {
+  // Debug marker to verify this init() is being called
+  if (typeof globalThis !== 'undefined') {
+    (globalThis as Record<string, unknown>)._sentryNextjsInitCalled = true;
+    (globalThis as Record<string, unknown>)._sentryNextjsInitTimestamp = Date.now();
+  }
+
   if (clientIsInitialized) {
     consoleSandbox(() => {
       // eslint-disable-next-line no-console