init commit

shared/logger/node_modules/@sentry-internal/tracing/esm/browser/backgroundtab.js

@@ -0,0 +1,36 @@
+import { getActiveTransaction } from '@sentry/core';
+import { logger } from '@sentry/utils';
+import { WINDOW } from './types.js';
+
+/**
+ * Add a listener that cancels and finishes a transaction when the global
+ * document is hidden.
+ */
+function registerBackgroundTabDetection() {
+  if (WINDOW && WINDOW.document) {
+    WINDOW.document.addEventListener('visibilitychange', () => {
+      const activeTransaction = getActiveTransaction() ;
+      if (WINDOW.document.hidden && activeTransaction) {
+        const statusType = 'cancelled';
+
+        (typeof __SENTRY_DEBUG__ === 'undefined' || __SENTRY_DEBUG__) &&
+          logger.log(
+            `[Tracing] Transaction: ${statusType} -> since tab moved to the background, op: ${activeTransaction.op}`,
+          );
+        // We should not set status if it is already set, this prevent important statuses like
+        // error or data loss from being overwritten on transaction.
+        if (!activeTransaction.status) {
+          activeTransaction.setStatus(statusType);
+        }
+        activeTransaction.setTag('visibilitychange', 'document.hidden');
+        activeTransaction.finish();
+      }
+    });
+  } else {
+    (typeof __SENTRY_DEBUG__ === 'undefined' || __SENTRY_DEBUG__) &&
+      logger.warn('[Tracing] Could not set up background tab detection due to lack of global document');
+  }
+}
+
+export { registerBackgroundTabDetection };
+//# sourceMappingURL=backgroundtab.js.map