Initial Commit

node_modules/web-vitals/dist/modules/attribution/onFID.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 { getLoadState } from '../lib/getLoadState.js';
+import { getSelector } from '../lib/getSelector.js';
+import { onFID as unattributedOnFID } from '../onFID.js';
+const attributeFID = (metric) => {
+    const fidEntry = metric.entries[0];
+    const attribution = {
+        eventTarget: getSelector(fidEntry.target),
+        eventType: fidEntry.name,
+        eventTime: fidEntry.startTime,
+        eventEntry: fidEntry,
+        loadState: getLoadState(fidEntry.startTime),
+    };
+    // Use Object.assign to set property to keep tsc happy.
+    const metricWithAttribution = Object.assign(metric, { attribution });
+    return metricWithAttribution;
+};
+/**
+ * Calculates the [FID](https://web.dev/articles/fid) value for the current page and
+ * calls the `callback` function once the value is ready, along with the
+ * relevant `first-input` performance entry used to determine the value. The
+ * reported value is a `DOMHighResTimeStamp`.
+ *
+ * _**Important:** since FID is only reported after the user interacts with the
+ * page, it's possible that it will not be reported for some page loads._
+ */
+export const onFID = (onReport, opts) => {
+    unattributedOnFID((metric) => {
+        const metricWithAttribution = attributeFID(metric);
+        onReport(metricWithAttribution);
+    }, opts);
+};