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node_modules/@sentry-internal/tracing/esm/browser/web-vitals/lib/onHidden.js

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+import { WINDOW } from '../../types.js';
+
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const onHidden = (cb, once) => {
+  const onHiddenOrPageHide = (event) => {
+    if (event.type === 'pagehide' || WINDOW.document.visibilityState === 'hidden') {
+      cb(event);
+      if (once) {
+        removeEventListener('visibilitychange', onHiddenOrPageHide, true);
+        removeEventListener('pagehide', onHiddenOrPageHide, true);
+      }
+    }
+  };
+
+  if (WINDOW.document) {
+    addEventListener('visibilitychange', onHiddenOrPageHide, true);
+    // Some browsers have buggy implementations of visibilitychange,
+    // so we use pagehide in addition, just to be safe.
+    addEventListener('pagehide', onHiddenOrPageHide, true);
+  }
+};
+
+export { onHidden };
+//# sourceMappingURL=onHidden.js.map