ref(svelte): use debug in svelte sdk (#16917)

resolves #16916

Author: AbhiPrasad

packages/svelte/src/debug_build.ts

@@ -0,0 +1,8 @@
+declare const __DEBUG_BUILD__: boolean;
+
+/**
+ * This serves as a build time flag that will be true by default, but false in non-debug builds or if users replace `__SENTRY_DEBUG__` in their generated code.
+ *
+ * ATTENTION: This constant must never cross package boundaries (i.e. be exported) to guarantee that it can be used for tree shaking.
+ */
+export const DEBUG_BUILD = __DEBUG_BUILD__;

packages/svelte/src/performance.ts

@@ -1,7 +1,8 @@
 import { SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN } from '@sentry/browser';
 import type { Span } from '@sentry/core';
-import { logger, startInactiveSpan } from '@sentry/core';
+import { debug, startInactiveSpan } from '@sentry/core';
 import { afterUpdate, beforeUpdate, onMount } from 'svelte';
+import { DEBUG_BUILD } from './debug_build';
 import type { TrackComponentOptions } from './types';
 
 const defaultTrackComponentOptions: {
@@ -37,9 +38,10 @@ export function trackComponent(options?: TrackComponentOptions): void {
     try {
       recordUpdateSpans(componentName);
     } catch {
-      logger.warn(
-        "Cannot track component updates. This is likely because you're using Svelte 5 in Runes mode. Set `trackUpdates: false` in `withSentryConfig` or `trackComponent` to disable this warning.",
-      );
+      DEBUG_BUILD &&
+        debug.warn(
+          "Cannot track component updates. This is likely because you're using Svelte 5 in Runes mode. Set `trackUpdates: false` in `withSentryConfig` or `trackComponent` to disable this warning.",
+        );
     }
   }
 }