Initial Commit

node_modules/web-vitals/dist/modules/lib/polyfills/interactionCountPolyfill.js

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+/*
+ * Copyright 2022 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 { observe } from '../observe.js';
+let interactionCountEstimate = 0;
+let minKnownInteractionId = Infinity;
+let maxKnownInteractionId = 0;
+const updateEstimate = (entries) => {
+    entries.forEach((e) => {
+        if (e.interactionId) {
+            minKnownInteractionId = Math.min(minKnownInteractionId, e.interactionId);
+            maxKnownInteractionId = Math.max(maxKnownInteractionId, e.interactionId);
+            interactionCountEstimate = maxKnownInteractionId
+                ? (maxKnownInteractionId - minKnownInteractionId) / 7 + 1
+                : 0;
+        }
+    });
+};
+let po;
+/**
+ * Returns the `interactionCount` value using the native API (if available)
+ * or the polyfill estimate in this module.
+ */
+export const getInteractionCount = () => {
+    return po ? interactionCountEstimate : performance.interactionCount || 0;
+};
+/**
+ * Feature detects native support or initializes the polyfill if needed.
+ */
+export const initInteractionCountPolyfill = () => {
+    if ('interactionCount' in performance || po)
+        return;
+    po = observe('event', updateEstimate, {
+        type: 'event',
+        buffered: true,
+        durationThreshold: 0,
+    });
+};