Initial Commit

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

@@ -0,0 +1,25 @@
+/*
+ * 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.
+ */
+let bfcacheRestoreTime = -1;
+export const getBFCacheRestoreTime = () => bfcacheRestoreTime;
+export const onBFCacheRestore = (cb) => {
+    addEventListener('pageshow', (event) => {
+        if (event.persisted) {
+            bfcacheRestoreTime = event.timeStamp;
+            cb(event);
+        }
+    }, true);
+};