Initial Commit

node_modules/web-vitals/dist/modules/lib/whenIdle.js

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2024 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.
+ */
+import { onHidden } from './onHidden.js';
+import { runOnce } from './runOnce.js';
+/**
+ * Runs the passed callback during the next idle period, or immediately
+ * if the browser's visibility state is (or becomes) hidden.
+ */
+export const whenIdle = (cb) => {
+    const rIC = self.requestIdleCallback || self.setTimeout;
+    let handle = -1;
+    cb = runOnce(cb);
+    // If the document is hidden, run the callback immediately, otherwise
+    // race an idle callback with the next `visibilitychange` event.
+    if (document.visibilityState === 'hidden') {
+        cb();
+    }
+    else {
+        handle = rIC(cb);
+        onHidden(cb);
+    }
+    return handle;
+};