fix: prevent asset conflicts between React and Grid.js versions

Add coexistence checks to all enqueue methods to prevent loading
both React and Grid.js assets simultaneously.

Changes:
- ReactAdmin.php: Only enqueue React assets when ?react=1
- Init.php: Skip Grid.js when React active on admin pages
- Form.php, Coupon.php, Access.php: Restore classic assets when ?react=0
- Customer.php, Product.php, License.php: Add coexistence checks

Now the toggle between Classic and React versions works correctly.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

node_modules/web-vitals/src/attribution.ts

@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+export {onCLS} from './attribution/onCLS.js';
+export {onFCP} from './attribution/onFCP.js';
+export {onFID} from './attribution/onFID.js';
+export {onINP} from './attribution/onINP.js';
+export {onLCP} from './attribution/onLCP.js';
+export {onTTFB} from './attribution/onTTFB.js';
+
+export {CLSThresholds} from './onCLS.js';
+export {FCPThresholds} from './onFCP.js';
+export {FIDThresholds} from './onFID.js';
+export {INPThresholds} from './onINP.js';
+export {LCPThresholds} from './onLCP.js';
+export {TTFBThresholds} from './onTTFB.js';
+
+export * from './types.js';

node_modules/web-vitals/src/attribution/onCLS.ts

@@ -0,0 +1,90 @@
+/*
+ * 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 {onCLS as unattributedOnCLS} from '../onCLS.js';
+import {
+  CLSReportCallback,
+  CLSReportCallbackWithAttribution,
+  CLSMetric,
+  CLSMetricWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const getLargestLayoutShiftEntry = (entries: LayoutShift[]) => {
+  return entries.reduce((a, b) => (a && a.value > b.value ? a : b));
+};
+
+const getLargestLayoutShiftSource = (sources: LayoutShiftAttribution[]) => {
+  return sources.find((s) => s.node && s.node.nodeType === 1) || sources[0];
+};
+
+const attributeCLS = (metric: CLSMetric): void => {
+  if (metric.entries.length) {
+    const largestEntry = getLargestLayoutShiftEntry(metric.entries);
+    if (largestEntry && largestEntry.sources && largestEntry.sources.length) {
+      const largestSource = getLargestLayoutShiftSource(largestEntry.sources);
+      if (largestSource) {
+        (metric as CLSMetricWithAttribution).attribution = {
+          largestShiftTarget: getSelector(largestSource.node),
+          largestShiftTime: largestEntry.startTime,
+          largestShiftValue: largestEntry.value,
+          largestShiftSource: largestSource,
+          largestShiftEntry: largestEntry,
+          loadState: getLoadState(largestEntry.startTime),
+        };
+        return;
+      }
+    }
+  }
+  // Set an empty object if no other attribution has been set.
+  (metric as CLSMetricWithAttribution).attribution = {};
+};
+
+/**
+ * Calculates the [CLS](https://web.dev/articles/cls) value for the current page and
+ * calls the `callback` function once the value is ready to be reported, along
+ * with all `layout-shift` performance entries that were used in the metric
+ * value calculation. The reported value is a `double` (corresponding to a
+ * [layout shift score](https://web.dev/articles/cls#layout_shift_score)).
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called as soon as the value is initially
+ * determined as well as any time the value changes throughout the page
+ * lifespan.
+ *
+ * _**Important:** CLS should be continually monitored for changes throughout
+ * the entire lifespan of a page—including if the user returns to the page after
+ * it's been hidden/backgrounded. However, since browsers often [will not fire
+ * additional callbacks once the user has backgrounded a
+ * page](https://developer.chrome.com/blog/page-lifecycle-api/#advice-hidden),
+ * `callback` is always called when the page's visibility state changes to
+ * hidden. As a result, the `callback` function might be called multiple times
+ * during the same page load._
+ */
+export const onCLS = (
+  onReport: CLSReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnCLS(
+    ((metric: CLSMetricWithAttribution) => {
+      attributeCLS(metric);
+      onReport(metric);
+    }) as CLSReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/attribution/onFCP.ts

@@ -0,0 +1,73 @@
+/*
+ * 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 {getBFCacheRestoreTime} from '../lib/bfcache.js';
+import {getLoadState} from '../lib/getLoadState.js';
+import {getNavigationEntry} from '../lib/getNavigationEntry.js';
+import {onFCP as unattributedOnFCP} from '../onFCP.js';
+import {
+  FCPMetric,
+  FCPMetricWithAttribution,
+  FCPReportCallback,
+  FCPReportCallbackWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const attributeFCP = (metric: FCPMetric): void => {
+  if (metric.entries.length) {
+    const navigationEntry = getNavigationEntry();
+    const fcpEntry = metric.entries[metric.entries.length - 1];
+
+    if (navigationEntry) {
+      const activationStart = navigationEntry.activationStart || 0;
+      const ttfb = Math.max(0, navigationEntry.responseStart - activationStart);
+
+      (metric as FCPMetricWithAttribution).attribution = {
+        timeToFirstByte: ttfb,
+        firstByteToFCP: metric.value - ttfb,
+        loadState: getLoadState(metric.entries[0].startTime),
+        navigationEntry,
+        fcpEntry,
+      };
+      return;
+    }
+  }
+  // Set an empty object if no other attribution has been set.
+  (metric as FCPMetricWithAttribution).attribution = {
+    timeToFirstByte: 0,
+    firstByteToFCP: metric.value,
+    loadState: getLoadState(getBFCacheRestoreTime()),
+  };
+};
+
+/**
+ * Calculates the [FCP](https://web.dev/articles/fcp) value for the current page and
+ * calls the `callback` function once the value is ready, along with the
+ * relevant `paint` performance entry used to determine the value. The reported
+ * value is a `DOMHighResTimeStamp`.
+ */
+export const onFCP = (
+  onReport: FCPReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnFCP(
+    ((metric: FCPMetricWithAttribution) => {
+      attributeFCP(metric);
+      onReport(metric);
+    }) as FCPReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/attribution/onFID.ts

@@ -0,0 +1,59 @@
+/*
+ * 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';
+import {
+  FIDMetric,
+  FIDMetricWithAttribution,
+  FIDReportCallback,
+  FIDReportCallbackWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const attributeFID = (metric: FIDMetric): void => {
+  const fidEntry = metric.entries[0];
+  (metric as FIDMetricWithAttribution).attribution = {
+    eventTarget: getSelector(fidEntry.target),
+    eventType: fidEntry.name,
+    eventTime: fidEntry.startTime,
+    eventEntry: fidEntry,
+    loadState: getLoadState(fidEntry.startTime),
+  };
+};
+
+/**
+ * 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: FIDReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnFID(
+    ((metric: FIDMetricWithAttribution) => {
+      attributeFID(metric);
+      onReport(metric);
+    }) as FIDReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/attribution/onINP.ts

@@ -0,0 +1,100 @@
+/*
+ * 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 {onINP as unattributedOnINP} from '../onINP.js';
+import {
+  INPMetric,
+  INPMetricWithAttribution,
+  INPReportCallback,
+  INPReportCallbackWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const attributeINP = (metric: INPMetric): void => {
+  if (metric.entries.length) {
+    const longestEntry = metric.entries.sort((a, b) => {
+      // Sort by: 1) duration (DESC), then 2) processing time (DESC)
+      return (
+        b.duration - a.duration ||
+        b.processingEnd -
+          b.processingStart -
+          (a.processingEnd - a.processingStart)
+      );
+    })[0];
+
+    // Currently Chrome can return a null target for certain event types
+    // (especially pointer events). As the event target should be the same
+    // for all events in the same interaction, we pick the first non-null one.
+    // TODO: remove when 1367329 is resolved
+    // https://bugs.chromium.org/p/chromium/issues/detail?id=1367329
+    const firstEntryWithTarget = metric.entries.find((entry) => entry.target);
+
+    (metric as INPMetricWithAttribution).attribution = {
+      eventTarget: getSelector(
+        firstEntryWithTarget && firstEntryWithTarget.target,
+      ),
+      eventType: longestEntry.name,
+      eventTime: longestEntry.startTime,
+      eventEntry: longestEntry,
+      loadState: getLoadState(longestEntry.startTime),
+    };
+    return;
+  }
+  // Set an empty object if no other attribution has been set.
+  (metric as INPMetricWithAttribution).attribution = {};
+};
+
+/**
+ * Calculates the [INP](https://web.dev/articles/inp) value for the current
+ * page and calls the `callback` function once the value is ready, along with
+ * the `event` performance entries reported for that interaction. The reported
+ * value is a `DOMHighResTimeStamp`.
+ *
+ * A custom `durationThreshold` configuration option can optionally be passed to
+ * control what `event-timing` entries are considered for INP reporting. The
+ * default threshold is `40`, which means INP scores of less than 40 are
+ * reported as 0. Note that this will not affect your 75th percentile INP value
+ * unless that value is also less than 40 (well below the recommended
+ * [good](https://web.dev/articles/inp#what_is_a_good_inp_score) threshold).
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called as soon as the value is initially
+ * determined as well as any time the value changes throughout the page
+ * lifespan.
+ *
+ * _**Important:** INP should be continually monitored for changes throughout
+ * the entire lifespan of a page—including if the user returns to the page after
+ * it's been hidden/backgrounded. However, since browsers often [will not fire
+ * additional callbacks once the user has backgrounded a
+ * page](https://developer.chrome.com/blog/page-lifecycle-api/#advice-hidden),
+ * `callback` is always called when the page's visibility state changes to
+ * hidden. As a result, the `callback` function might be called multiple times
+ * during the same page load._
+ */
+export const onINP = (
+  onReport: INPReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnINP(
+    ((metric: INPMetricWithAttribution) => {
+      attributeINP(metric);
+      onReport(metric);
+    }) as INPReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/attribution/onLCP.ts

@@ -0,0 +1,114 @@
+/*
+ * 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 {getNavigationEntry} from '../lib/getNavigationEntry.js';
+import {getSelector} from '../lib/getSelector.js';
+import {onLCP as unattributedOnLCP} from '../onLCP.js';
+import {
+  LCPAttribution,
+  LCPMetric,
+  LCPMetricWithAttribution,
+  LCPReportCallback,
+  LCPReportCallbackWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const attributeLCP = (metric: LCPMetric) => {
+  if (metric.entries.length) {
+    const navigationEntry = getNavigationEntry();
+
+    if (navigationEntry) {
+      const activationStart = navigationEntry.activationStart || 0;
+      const lcpEntry = metric.entries[metric.entries.length - 1];
+      const lcpResourceEntry =
+        lcpEntry.url &&
+        performance
+          .getEntriesByType('resource')
+          .filter((e) => e.name === lcpEntry.url)[0];
+
+      const ttfb = Math.max(0, navigationEntry.responseStart - activationStart);
+
+      const lcpRequestStart = Math.max(
+        ttfb,
+        // Prefer `requestStart` (if TOA is set), otherwise use `startTime`.
+        lcpResourceEntry
+          ? (lcpResourceEntry.requestStart || lcpResourceEntry.startTime) -
+              activationStart
+          : 0,
+      );
+      const lcpResponseEnd = Math.max(
+        lcpRequestStart,
+        lcpResourceEntry ? lcpResourceEntry.responseEnd - activationStart : 0,
+      );
+      const lcpRenderTime = Math.max(
+        lcpResponseEnd,
+        lcpEntry ? lcpEntry.startTime - activationStart : 0,
+      );
+
+      const attribution: LCPAttribution = {
+        element: getSelector(lcpEntry.element),
+        timeToFirstByte: ttfb,
+        resourceLoadDelay: lcpRequestStart - ttfb,
+        resourceLoadTime: lcpResponseEnd - lcpRequestStart,
+        elementRenderDelay: lcpRenderTime - lcpResponseEnd,
+        navigationEntry,
+        lcpEntry,
+      };
+
+      // Only attribution the URL and resource entry if they exist.
+      if (lcpEntry.url) {
+        attribution.url = lcpEntry.url;
+      }
+      if (lcpResourceEntry) {
+        attribution.lcpResourceEntry = lcpResourceEntry;
+      }
+
+      (metric as LCPMetricWithAttribution).attribution = attribution;
+      return;
+    }
+  }
+  // Set an empty object if no other attribution has been set.
+  (metric as LCPMetricWithAttribution).attribution = {
+    timeToFirstByte: 0,
+    resourceLoadDelay: 0,
+    resourceLoadTime: 0,
+    elementRenderDelay: metric.value,
+  };
+};
+
+/**
+ * Calculates the [LCP](https://web.dev/articles/lcp) value for the current page and
+ * calls the `callback` function once the value is ready (along with the
+ * relevant `largest-contentful-paint` performance entry used to determine the
+ * value). The reported value is a `DOMHighResTimeStamp`.
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called any time a new `largest-contentful-paint`
+ * performance entry is dispatched, or once the final value of the metric has
+ * been determined.
+ */
+export const onLCP = (
+  onReport: LCPReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnLCP(
+    ((metric: LCPMetricWithAttribution) => {
+      attributeLCP(metric);
+      onReport(metric);
+    }) as LCPReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/attribution/onTTFB.ts

@@ -0,0 +1,88 @@
+/*
+ * 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 {onTTFB as unattributedOnTTFB} from '../onTTFB.js';
+import {
+  TTFBMetric,
+  TTFBMetricWithAttribution,
+  TTFBReportCallback,
+  TTFBReportCallbackWithAttribution,
+  ReportOpts,
+} from '../types.js';
+
+const attributeTTFB = (metric: TTFBMetric): void => {
+  if (metric.entries.length) {
+    const navigationEntry = metric.entries[0];
+    const activationStart = navigationEntry.activationStart || 0;
+
+    const dnsStart = Math.max(
+      navigationEntry.domainLookupStart - activationStart,
+      0,
+    );
+    const connectStart = Math.max(
+      navigationEntry.connectStart - activationStart,
+      0,
+    );
+    const requestStart = Math.max(
+      navigationEntry.requestStart - activationStart,
+      0,
+    );
+
+    (metric as TTFBMetricWithAttribution).attribution = {
+      waitingTime: dnsStart,
+      dnsTime: connectStart - dnsStart,
+      connectionTime: requestStart - connectStart,
+      requestTime: metric.value - requestStart,
+      navigationEntry: navigationEntry,
+    };
+    return;
+  }
+  // Set an empty object if no other attribution has been set.
+  (metric as TTFBMetricWithAttribution).attribution = {
+    waitingTime: 0,
+    dnsTime: 0,
+    connectionTime: 0,
+    requestTime: 0,
+  };
+};
+
+/**
+ * Calculates the [TTFB](https://web.dev/articles/ttfb) value for the
+ * current page and calls the `callback` function once the page has loaded,
+ * along with the relevant `navigation` performance entry used to determine the
+ * value. The reported value is a `DOMHighResTimeStamp`.
+ *
+ * Note, this function waits until after the page is loaded to call `callback`
+ * in order to ensure all properties of the `navigation` entry are populated.
+ * This is useful if you want to report on other metrics exposed by the
+ * [Navigation Timing API](https://w3c.github.io/navigation-timing/). For
+ * example, the TTFB metric starts from the page's [time
+ * origin](https://www.w3.org/TR/hr-time-2/#sec-time-origin), which means it
+ * includes time spent on DNS lookup, connection negotiation, network latency,
+ * and server processing time.
+ */
+export const onTTFB = (
+  onReport: TTFBReportCallbackWithAttribution,
+  opts?: ReportOpts,
+) => {
+  unattributedOnTTFB(
+    ((metric: TTFBMetricWithAttribution) => {
+      attributeTTFB(metric);
+      onReport(metric);
+    }) as TTFBReportCallback,
+    opts,
+  );
+};

node_modules/web-vitals/src/deprecated.ts

@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+export {
+  /**
+   * @deprecated Use `onCLS()` instead.
+   */
+  onCLS as getCLS,
+} from './onCLS.js';
+
+export {
+  /**
+   * @deprecated Use `onFCP()` instead.
+   */
+  onFCP as getFCP,
+} from './onFCP.js';
+
+export {
+  /**
+   * @deprecated Use `onFID()` instead.
+   */
+  onFID as getFID,
+} from './onFID.js';
+
+export {
+  /**
+   * @deprecated Use `onINP()` instead.
+   */
+  onINP as getINP,
+} from './onINP.js';
+
+export {
+  /**
+   * @deprecated Use `onLCP()` instead.
+   */
+  onLCP as getLCP,
+} from './onLCP.js';
+
+export {
+  /**
+   * @deprecated Use `onTTFB()` instead.
+   */
+  onTTFB as getTTFB,
+} from './onTTFB.js';
+
+export {
+  /**
+   * @deprecated Use `ReportCallback` instead.
+   */
+  ReportCallback as ReportHandler,
+} from './types.js';

node_modules/web-vitals/src/index.ts

@@ -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.
+ */
+
+export {onCLS, CLSThresholds} from './onCLS.js';
+export {onFCP, FCPThresholds} from './onFCP.js';
+export {onFID, FIDThresholds} from './onFID.js';
+export {onINP, INPThresholds} from './onINP.js';
+export {onLCP, LCPThresholds} from './onLCP.js';
+export {onTTFB, TTFBThresholds} from './onTTFB.js';
+
+export * from './deprecated.js';
+export * from './types.js';

node_modules/web-vitals/src/lib/bfcache.ts

@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+
+interface onBFCacheRestoreCallback {
+  (event: PageTransitionEvent): void;
+}
+
+let bfcacheRestoreTime = -1;
+
+export const getBFCacheRestoreTime = () => bfcacheRestoreTime;
+
+export const onBFCacheRestore = (cb: onBFCacheRestoreCallback) => {
+  addEventListener(
+    'pageshow',
+    (event) => {
+      if (event.persisted) {
+        bfcacheRestoreTime = event.timeStamp;
+        cb(event);
+      }
+    },
+    true,
+  );
+};

node_modules/web-vitals/src/lib/bindReporter.ts

@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+import {MetricType, MetricRatingThresholds} from '../types.js';
+
+const getRating = (
+  value: number,
+  thresholds: MetricRatingThresholds,
+): MetricType['rating'] => {
+  if (value > thresholds[1]) {
+    return 'poor';
+  }
+  if (value > thresholds[0]) {
+    return 'needs-improvement';
+  }
+  return 'good';
+};
+
+export const bindReporter = <MetricName extends MetricType['name']>(
+  callback: (metric: Extract<MetricType, {name: MetricName}>) => void,
+  metric: Extract<MetricType, {name: MetricName}>,
+  thresholds: MetricRatingThresholds,
+  reportAllChanges?: boolean,
+) => {
+  let prevValue: number;
+  let delta: number;
+  return (forceReport?: boolean) => {
+    if (metric.value >= 0) {
+      if (forceReport || reportAllChanges) {
+        delta = metric.value - (prevValue || 0);
+
+        // Report the metric if there's a non-zero delta or if no previous
+        // value exists (which can happen in the case of the document becoming
+        // hidden when the metric value is 0).
+        // See: https://github.com/GoogleChrome/web-vitals/issues/14
+        if (delta || prevValue === undefined) {
+          prevValue = metric.value;
+          metric.delta = delta;
+          metric.rating = getRating(metric.value, thresholds);
+          callback(metric);
+        }
+      }
+    }
+  };
+};

node_modules/web-vitals/src/lib/doubleRAF.ts

@@ -0,0 +1,19 @@
+/*
+ * 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.
+ */
+
+export const doubleRAF = (cb: () => unknown) => {
+  requestAnimationFrame(() => requestAnimationFrame(() => cb()));
+};

node_modules/web-vitals/src/lib/generateUniqueID.ts

@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+/**
+ * Performantly generate a unique, 30-char string by combining a version
+ * number, the current timestamp with a 13-digit number integer.
+ * @return {string}
+ */
+export const generateUniqueID = () => {
+  return `v3-${Date.now()}-${Math.floor(Math.random() * (9e12 - 1)) + 1e12}`;
+};

node_modules/web-vitals/src/lib/getActivationStart.ts

@@ -0,0 +1,22 @@
+/*
+ * 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 {getNavigationEntry} from './getNavigationEntry.js';
+
+export const getActivationStart = (): number => {
+  const navEntry = getNavigationEntry();
+  return (navEntry && navEntry.activationStart) || 0;
+};

node_modules/web-vitals/src/lib/getLoadState.ts

@@ -0,0 +1,51 @@
+/*
+ * 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 {getNavigationEntry} from './getNavigationEntry.js';
+import {LoadState} from '../types.js';
+
+export const getLoadState = (timestamp: number): LoadState => {
+  if (document.readyState === 'loading') {
+    // If the `readyState` is 'loading' there's no need to look at timestamps
+    // since the timestamp has to be the current time or earlier.
+    return 'loading';
+  } else {
+    const navigationEntry = getNavigationEntry();
+    if (navigationEntry) {
+      if (timestamp < navigationEntry.domInteractive) {
+        return 'loading';
+      } else if (
+        navigationEntry.domContentLoadedEventStart === 0 ||
+        timestamp < navigationEntry.domContentLoadedEventStart
+      ) {
+        // If the `domContentLoadedEventStart` timestamp has not yet been
+        // set, or if the given timestamp is less than that value.
+        return 'dom-interactive';
+      } else if (
+        navigationEntry.domComplete === 0 ||
+        timestamp < navigationEntry.domComplete
+      ) {
+        // If the `domComplete` timestamp has not yet been
+        // set, or if the given timestamp is less than that value.
+        return 'dom-content-loaded';
+      }
+    }
+  }
+  // If any of the above fail, default to loaded. This could really only
+  // happy if the browser doesn't support the performance timeline, which
+  // most likely means this code would never run anyway.
+  return 'complete';
+};

node_modules/web-vitals/src/lib/getNavigationEntry.ts

@@ -0,0 +1,60 @@
+/*
+ * 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 {NavigationTimingPolyfillEntry} from '../types.js';
+
+const getNavigationEntryFromPerformanceTiming =
+  (): NavigationTimingPolyfillEntry => {
+    const timing = performance.timing;
+    const type = performance.navigation.type;
+
+    const navigationEntry: {[key: string]: number | string} = {
+      entryType: 'navigation',
+      startTime: 0,
+      type: type == 2 ? 'back_forward' : type === 1 ? 'reload' : 'navigate',
+    };
+
+    for (const key in timing) {
+      if (key !== 'navigationStart' && key !== 'toJSON') {
+        navigationEntry[key] = Math.max(
+          (timing[key as keyof PerformanceTiming] as number) -
+            timing.navigationStart,
+          0,
+        );
+      }
+    }
+    return navigationEntry as unknown as NavigationTimingPolyfillEntry;
+  };
+
+export const getNavigationEntry = ():
+  | PerformanceNavigationTiming
+  | NavigationTimingPolyfillEntry
+  | undefined => {
+  if (window.__WEB_VITALS_POLYFILL__) {
+    return (
+      window.performance &&
+      ((performance.getEntriesByType &&
+        performance.getEntriesByType('navigation')[0]) ||
+        getNavigationEntryFromPerformanceTiming())
+    );
+  } else {
+    return (
+      window.performance &&
+      performance.getEntriesByType &&
+      performance.getEntriesByType('navigation')[0]
+    );
+  }
+};

node_modules/web-vitals/src/lib/getSelector.ts

@@ -0,0 +1,48 @@
+/*
+ * 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.
+ */
+
+const getName = (node: Node) => {
+  const name = node.nodeName;
+  return node.nodeType === 1
+    ? name.toLowerCase()
+    : name.toUpperCase().replace(/^#/, '');
+};
+
+export const getSelector = (node: Node | null | undefined, maxLen?: number) => {
+  let sel = '';
+
+  try {
+    while (node && node.nodeType !== 9) {
+      const el: Element = node as Element;
+      const part = el.id
+        ? '#' + el.id
+        : getName(el) +
+          (el.classList &&
+          el.classList.value &&
+          el.classList.value.trim() &&
+          el.classList.value.trim().length
+            ? '.' + el.classList.value.trim().replace(/\s+/g, '.')
+            : '');
+      if (sel.length + part.length > (maxLen || 100) - 1) return sel || part;
+      sel = sel ? part + '>' + sel : part;
+      if (el.id) break;
+      node = el.parentNode;
+    }
+  } catch (err) {
+    // Do nothing...
+  }
+  return sel;
+};

node_modules/web-vitals/src/lib/getVisibilityWatcher.ts

@@ -0,0 +1,96 @@
+/*
+ * 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.
+ */
+
+import {onBFCacheRestore} from './bfcache.js';
+
+let firstHiddenTime = -1;
+
+const initHiddenTime = () => {
+  // If the document is hidden when this code runs, assume it was always
+  // hidden and the page was loaded in the background, with the one exception
+  // that visibility state is always 'hidden' during prerendering, so we have
+  // to ignore that case until prerendering finishes (see: `prerenderingchange`
+  // event logic below).
+  return document.visibilityState === 'hidden' && !document.prerendering
+    ? 0
+    : Infinity;
+};
+
+const onVisibilityUpdate = (event: Event) => {
+  // If the document is 'hidden' and no previous hidden timestamp has been
+  // set, update it based on the current event data.
+  if (document.visibilityState === 'hidden' && firstHiddenTime > -1) {
+    // If the event is a 'visibilitychange' event, it means the page was
+    // visible prior to this change, so the event timestamp is the first
+    // hidden time.
+    // However, if the event is not a 'visibilitychange' event, then it must
+    // be a 'prerenderingchange' event, and the fact that the document is
+    // still 'hidden' from the above check means the tab was activated
+    // in a background state and so has always been hidden.
+    firstHiddenTime = event.type === 'visibilitychange' ? event.timeStamp : 0;
+
+    // Remove all listeners now that a `firstHiddenTime` value has been set.
+    removeChangeListeners();
+  }
+};
+
+const addChangeListeners = () => {
+  addEventListener('visibilitychange', onVisibilityUpdate, true);
+  // IMPORTANT: when a page is prerendering, its `visibilityState` is
+  // 'hidden', so in order to account for cases where this module checks for
+  // visibility during prerendering, an additional check after prerendering
+  // completes is also required.
+  addEventListener('prerenderingchange', onVisibilityUpdate, true);
+};
+
+const removeChangeListeners = () => {
+  removeEventListener('visibilitychange', onVisibilityUpdate, true);
+  removeEventListener('prerenderingchange', onVisibilityUpdate, true);
+};
+
+export const getVisibilityWatcher = () => {
+  if (firstHiddenTime < 0) {
+    // If the document is hidden when this code runs, assume it was hidden
+    // since navigation start. This isn't a perfect heuristic, but it's the
+    // best we can do until an API is available to support querying past
+    // visibilityState.
+    if (window.__WEB_VITALS_POLYFILL__) {
+      firstHiddenTime = window.webVitals.firstHiddenTime;
+      if (firstHiddenTime === Infinity) {
+        addChangeListeners();
+      }
+    } else {
+      firstHiddenTime = initHiddenTime();
+      addChangeListeners();
+    }
+
+    // Reset the time on bfcache restores.
+    onBFCacheRestore(() => {
+      // Schedule a task in order to track the `visibilityState` once it's
+      // had an opportunity to change to visible in all browsers.
+      // https://bugs.chromium.org/p/chromium/issues/detail?id=1133363
+      setTimeout(() => {
+        firstHiddenTime = initHiddenTime();
+        addChangeListeners();
+      }, 0);
+    });
+  }
+  return {
+    get firstHiddenTime() {
+      return firstHiddenTime;
+    },
+  };
+};

node_modules/web-vitals/src/lib/initMetric.ts

@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+
+import {getBFCacheRestoreTime} from './bfcache.js';
+import {generateUniqueID} from './generateUniqueID.js';
+import {getActivationStart} from './getActivationStart.js';
+import {getNavigationEntry} from './getNavigationEntry.js';
+import {MetricType} from '../types.js';
+
+export const initMetric = <MetricName extends MetricType['name']>(
+  name: MetricName,
+  value?: number,
+) => {
+  const navEntry = getNavigationEntry();
+  let navigationType: MetricType['navigationType'] = 'navigate';
+
+  if (getBFCacheRestoreTime() >= 0) {
+    navigationType = 'back-forward-cache';
+  } else if (navEntry) {
+    if (document.prerendering || getActivationStart() > 0) {
+      navigationType = 'prerender';
+    } else if (document.wasDiscarded) {
+      navigationType = 'restore';
+    } else if (navEntry.type) {
+      navigationType = navEntry.type.replace(
+        /_/g,
+        '-',
+      ) as MetricType['navigationType'];
+    }
+  }
+
+  // Use `entries` type specific for the metric.
+  const entries: Extract<MetricType, {name: MetricName}>['entries'] = [];
+
+  return {
+    name,
+    value: typeof value === 'undefined' ? -1 : value,
+    rating: 'good' as const, // If needed, will be updated when reported. `const` to keep the type from widening to `string`.
+    delta: 0,
+    entries,
+    id: generateUniqueID(),
+    navigationType,
+  };
+};

node_modules/web-vitals/src/lib/observe.ts

@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+import {
+  FirstInputPolyfillEntry,
+  NavigationTimingPolyfillEntry,
+} from '../types.js';
+
+interface PerformanceEntryMap {
+  'event': PerformanceEventTiming[];
+  'paint': PerformancePaintTiming[];
+  'layout-shift': LayoutShift[];
+  'largest-contentful-paint': LargestContentfulPaint[];
+  'first-input': PerformanceEventTiming[] | FirstInputPolyfillEntry[];
+  'navigation': PerformanceNavigationTiming[] | NavigationTimingPolyfillEntry[];
+  'resource': PerformanceResourceTiming[];
+}
+
+/**
+ * Takes a performance entry type and a callback function, and creates a
+ * `PerformanceObserver` instance that will observe the specified entry type
+ * with buffering enabled and call the callback _for each entry_.
+ *
+ * This function also feature-detects entry support and wraps the logic in a
+ * try/catch to avoid errors in unsupporting browsers.
+ */
+export const observe = <K extends keyof PerformanceEntryMap>(
+  type: K,
+  callback: (entries: PerformanceEntryMap[K]) => void,
+  opts?: PerformanceObserverInit,
+): PerformanceObserver | undefined => {
+  try {
+    if (PerformanceObserver.supportedEntryTypes.includes(type)) {
+      const po = new PerformanceObserver((list) => {
+        // Delay by a microtask to workaround a bug in Safari where the
+        // callback is invoked immediately, rather than in a separate task.
+        // See: https://github.com/GoogleChrome/web-vitals/issues/277
+        Promise.resolve().then(() => {
+          callback(list.getEntries() as PerformanceEntryMap[K]);
+        });
+      });
+      po.observe(
+        Object.assign(
+          {
+            type,
+            buffered: true,
+          },
+          opts || {},
+        ) as PerformanceObserverInit,
+      );
+      return po;
+    }
+  } catch (e) {
+    // Do nothing.
+  }
+  return;
+};

node_modules/web-vitals/src/lib/onHidden.ts

@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+export interface OnHiddenCallback {
+  (event: Event): void;
+}
+
+export const onHidden = (cb: OnHiddenCallback) => {
+  const onHiddenOrPageHide = (event: Event) => {
+    if (event.type === 'pagehide' || document.visibilityState === 'hidden') {
+      cb(event);
+    }
+  };
+  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);
+};

node_modules/web-vitals/src/lib/polyfills/firstInputPolyfill.ts

@@ -0,0 +1,174 @@
+/*
+ * 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.
+ */
+
+import {
+  FirstInputPolyfillEntry,
+  FirstInputPolyfillCallback,
+} from '../../types.js';
+
+type addOrRemoveEventListener =
+  | typeof addEventListener
+  | typeof removeEventListener;
+
+let firstInputEvent: Event | null;
+let firstInputDelay: number;
+let firstInputTimeStamp: Date;
+let callbacks: FirstInputPolyfillCallback[];
+
+const listenerOpts: AddEventListenerOptions = {passive: true, capture: true};
+const startTimeStamp: Date = new Date();
+
+/**
+ * Accepts a callback to be invoked once the first input delay and event
+ * are known.
+ */
+export const firstInputPolyfill = (
+  onFirstInput: FirstInputPolyfillCallback,
+) => {
+  callbacks.push(onFirstInput);
+  reportFirstInputDelayIfRecordedAndValid();
+};
+
+export const resetFirstInputPolyfill = () => {
+  callbacks = [];
+  firstInputDelay = -1;
+  firstInputEvent = null;
+  eachEventType(addEventListener);
+};
+
+/**
+ * Records the first input delay and event, so subsequent events can be
+ * ignored. All added event listeners are then removed.
+ */
+const recordFirstInputDelay = (delay: number, event: Event) => {
+  if (!firstInputEvent) {
+    firstInputEvent = event;
+    firstInputDelay = delay;
+    firstInputTimeStamp = new Date();
+
+    eachEventType(removeEventListener);
+    reportFirstInputDelayIfRecordedAndValid();
+  }
+};
+
+/**
+ * Reports the first input delay and event (if they're recorded and valid)
+ * by running the array of callback functions.
+ */
+const reportFirstInputDelayIfRecordedAndValid = () => {
+  // In some cases the recorded delay is clearly wrong, e.g. it's negative
+  // or it's larger than the delta between now and initialization.
+  // - https://github.com/GoogleChromeLabs/first-input-delay/issues/4
+  // - https://github.com/GoogleChromeLabs/first-input-delay/issues/6
+  // - https://github.com/GoogleChromeLabs/first-input-delay/issues/7
+  if (
+    firstInputDelay >= 0 &&
+    // @ts-ignore (subtracting two dates always returns a number)
+    firstInputDelay < firstInputTimeStamp - startTimeStamp
+  ) {
+    const entry = {
+      entryType: 'first-input',
+      name: firstInputEvent!.type,
+      target: firstInputEvent!.target,
+      cancelable: firstInputEvent!.cancelable,
+      startTime: firstInputEvent!.timeStamp,
+      processingStart: firstInputEvent!.timeStamp + firstInputDelay,
+    } as FirstInputPolyfillEntry;
+    callbacks.forEach(function (callback) {
+      callback(entry);
+    });
+    callbacks = [];
+  }
+};
+
+/**
+ * Handles pointer down events, which are a special case.
+ * Pointer events can trigger main or compositor thread behavior.
+ * We differentiate these cases based on whether or not we see a
+ * 'pointercancel' event, which are fired when we scroll. If we're scrolling
+ * we don't need to report input delay since FID excludes scrolling and
+ * pinch/zooming.
+ */
+const onPointerDown = (delay: number, event: Event) => {
+  /**
+   * Responds to 'pointerup' events and records a delay. If a pointer up event
+   * is the next event after a pointerdown event, then it's not a scroll or
+   * a pinch/zoom.
+   */
+  const onPointerUp = () => {
+    recordFirstInputDelay(delay, event);
+    removePointerEventListeners();
+  };
+
+  /**
+   * Responds to 'pointercancel' events and removes pointer listeners.
+   * If a 'pointercancel' is the next event to fire after a pointerdown event,
+   * it means this is a scroll or pinch/zoom interaction.
+   */
+  const onPointerCancel = () => {
+    removePointerEventListeners();
+  };
+
+  /**
+   * Removes added pointer event listeners.
+   */
+  const removePointerEventListeners = () => {
+    removeEventListener('pointerup', onPointerUp, listenerOpts);
+    removeEventListener('pointercancel', onPointerCancel, listenerOpts);
+  };
+
+  addEventListener('pointerup', onPointerUp, listenerOpts);
+  addEventListener('pointercancel', onPointerCancel, listenerOpts);
+};
+
+/**
+ * Handles all input events and records the time between when the event
+ * was received by the operating system and when it's JavaScript listeners
+ * were able to run.
+ */
+const onInput = (event: Event) => {
+  // Only count cancelable events, which should trigger behavior
+  // important to the user.
+  if (event.cancelable) {
+    // In some browsers `event.timeStamp` returns a `DOMTimeStamp` value
+    // (epoch time) instead of the newer `DOMHighResTimeStamp`
+    // (document-origin time). To check for that we assume any timestamp
+    // greater than 1 trillion is a `DOMTimeStamp`, and compare it using
+    // the `Date` object rather than `performance.now()`.
+    // - https://github.com/GoogleChromeLabs/first-input-delay/issues/4
+    const isEpochTime = event.timeStamp > 1e12;
+    const now = isEpochTime ? new Date() : performance.now();
+
+    // Input delay is the delta between when the system received the event
+    // (e.g. event.timeStamp) and when it could run the callback (e.g. `now`).
+    const delay = (now as number) - event.timeStamp;
+
+    if (event.type == 'pointerdown') {
+      onPointerDown(delay, event);
+    } else {
+      recordFirstInputDelay(delay, event);
+    }
+  }
+};
+
+/**
+ * Invokes the passed callback const for =  each event type with t =>he
+ * `onInput` const and =  `listenerOpts =>`.
+ */
+const eachEventType = (callback: addOrRemoveEventListener) => {
+  const eventTypes = ['mousedown', 'keydown', 'touchstart', 'pointerdown'];
+  eventTypes.forEach((type) => callback(type, onInput, listenerOpts));
+};

node_modules/web-vitals/src/lib/polyfills/getFirstHiddenTimePolyfill.ts

@@ -0,0 +1,29 @@
+/*
+ * 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 firstHiddenTime = document.visibilityState === 'hidden' ? 0 : Infinity;
+
+const onVisibilityChange = (event: Event) => {
+  if (document.visibilityState === 'hidden') {
+    firstHiddenTime = event.timeStamp;
+    removeEventListener('visibilitychange', onVisibilityChange, true);
+  }
+};
+
+// Note: do not add event listeners unconditionally (outside of polyfills).
+addEventListener('visibilitychange', onVisibilityChange, true);
+
+export const getFirstHiddenTime = () => firstHiddenTime;

node_modules/web-vitals/src/lib/polyfills/interactionCountPolyfill.ts

@@ -0,0 +1,63 @@
+/*
+ * 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';
+
+declare global {
+  interface Performance {
+    interactionCount: number;
+  }
+}
+
+let interactionCountEstimate = 0;
+let minKnownInteractionId = Infinity;
+let maxKnownInteractionId = 0;
+
+const updateEstimate = (entries: PerformanceEventTiming[]) => {
+  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: PerformanceObserver | undefined;
+
+/**
+ * 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,
+  } as PerformanceObserverInit);
+};

node_modules/web-vitals/src/lib/runOnce.ts

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+
+export interface RunOnceCallback {
+  (arg: unknown): void;
+}
+
+export const runOnce = (cb: RunOnceCallback) => {
+  let called = false;
+  return (arg: unknown) => {
+    if (!called) {
+      cb(arg);
+      called = true;
+    }
+  };
+};

node_modules/web-vitals/src/lib/whenActivated.ts

@@ -0,0 +1,23 @@
+/*
+ * 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.
+ */
+
+export const whenActivated = (callback: () => void) => {
+  if (document.prerendering) {
+    addEventListener('prerenderingchange', () => callback(), true);
+  } else {
+    callback();
+  }
+};

node_modules/web-vitals/src/onCLS.ts

@@ -0,0 +1,140 @@
+/*
+ * 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.
+ */
+
+import {onBFCacheRestore} from './lib/bfcache.js';
+import {initMetric} from './lib/initMetric.js';
+import {observe} from './lib/observe.js';
+import {bindReporter} from './lib/bindReporter.js';
+import {doubleRAF} from './lib/doubleRAF.js';
+import {onHidden} from './lib/onHidden.js';
+import {runOnce} from './lib/runOnce.js';
+import {onFCP} from './onFCP.js';
+import {
+  CLSMetric,
+  CLSReportCallback,
+  MetricRatingThresholds,
+  ReportOpts,
+} from './types.js';
+
+/** Thresholds for CLS. See https://web.dev/articles/cls#what_is_a_good_cls_score */
+export const CLSThresholds: MetricRatingThresholds = [0.1, 0.25];
+
+/**
+ * Calculates the [CLS](https://web.dev/articles/cls) value for the current page and
+ * calls the `callback` function once the value is ready to be reported, along
+ * with all `layout-shift` performance entries that were used in the metric
+ * value calculation. The reported value is a `double` (corresponding to a
+ * [layout shift score](https://web.dev/articles/cls#layout_shift_score)).
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called as soon as the value is initially
+ * determined as well as any time the value changes throughout the page
+ * lifespan.
+ *
+ * _**Important:** CLS should be continually monitored for changes throughout
+ * the entire lifespan of a page—including if the user returns to the page after
+ * it's been hidden/backgrounded. However, since browsers often [will not fire
+ * additional callbacks once the user has backgrounded a
+ * page](https://developer.chrome.com/blog/page-lifecycle-api/#advice-hidden),
+ * `callback` is always called when the page's visibility state changes to
+ * hidden. As a result, the `callback` function might be called multiple times
+ * during the same page load._
+ */
+export const onCLS = (onReport: CLSReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  // Start monitoring FCP so we can only report CLS if FCP is also reported.
+  // Note: this is done to match the current behavior of CrUX.
+  onFCP(
+    runOnce(() => {
+      let metric = initMetric('CLS', 0);
+      let report: ReturnType<typeof bindReporter>;
+
+      let sessionValue = 0;
+      let sessionEntries: LayoutShift[] = [];
+
+      const handleEntries = (entries: LayoutShift[]) => {
+        entries.forEach((entry) => {
+          // Only count layout shifts without recent user input.
+          if (!entry.hadRecentInput) {
+            const firstSessionEntry = sessionEntries[0];
+            const lastSessionEntry = sessionEntries[sessionEntries.length - 1];
+
+            // If the entry occurred less than 1 second after the previous entry
+            // and less than 5 seconds after the first entry in the session,
+            // include the entry in the current session. Otherwise, start a new
+            // session.
+            if (
+              sessionValue &&
+              entry.startTime - lastSessionEntry.startTime < 1000 &&
+              entry.startTime - firstSessionEntry.startTime < 5000
+            ) {
+              sessionValue += entry.value;
+              sessionEntries.push(entry);
+            } else {
+              sessionValue = entry.value;
+              sessionEntries = [entry];
+            }
+          }
+        });
+
+        // If the current session value is larger than the current CLS value,
+        // update CLS and the entries contributing to it.
+        if (sessionValue > metric.value) {
+          metric.value = sessionValue;
+          metric.entries = sessionEntries;
+          report();
+        }
+      };
+
+      const po = observe('layout-shift', handleEntries);
+      if (po) {
+        report = bindReporter(
+          onReport,
+          metric,
+          CLSThresholds,
+          opts!.reportAllChanges,
+        );
+
+        onHidden(() => {
+          handleEntries(po.takeRecords() as CLSMetric['entries']);
+          report(true);
+        });
+
+        // Only report after a bfcache restore if the `PerformanceObserver`
+        // successfully registered.
+        onBFCacheRestore(() => {
+          sessionValue = 0;
+          metric = initMetric('CLS', 0);
+          report = bindReporter(
+            onReport,
+            metric,
+            CLSThresholds,
+            opts!.reportAllChanges,
+          );
+
+          doubleRAF(() => report());
+        });
+
+        // Queue a task to report (if nothing else triggers a report first).
+        // This allows CLS to be reported as soon as FCP fires when
+        // `reportAllChanges` is true.
+        setTimeout(report, 0);
+      }
+    }),
+  );
+};

node_modules/web-vitals/src/onFCP.ts

@@ -0,0 +1,97 @@
+/*
+ * 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.
+ */
+
+import {onBFCacheRestore} from './lib/bfcache.js';
+import {bindReporter} from './lib/bindReporter.js';
+import {doubleRAF} from './lib/doubleRAF.js';
+import {getActivationStart} from './lib/getActivationStart.js';
+import {getVisibilityWatcher} from './lib/getVisibilityWatcher.js';
+import {initMetric} from './lib/initMetric.js';
+import {observe} from './lib/observe.js';
+import {whenActivated} from './lib/whenActivated.js';
+import {
+  FCPMetric,
+  FCPReportCallback,
+  MetricRatingThresholds,
+  ReportOpts,
+} from './types.js';
+
+/** Thresholds for FCP. See https://web.dev/articles/fcp#what_is_a_good_fcp_score */
+export const FCPThresholds: MetricRatingThresholds = [1800, 3000];
+
+/**
+ * Calculates the [FCP](https://web.dev/articles/fcp) value for the current page and
+ * calls the `callback` function once the value is ready, along with the
+ * relevant `paint` performance entry used to determine the value. The reported
+ * value is a `DOMHighResTimeStamp`.
+ */
+export const onFCP = (onReport: FCPReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  whenActivated(() => {
+    const visibilityWatcher = getVisibilityWatcher();
+    let metric = initMetric('FCP');
+    let report: ReturnType<typeof bindReporter>;
+
+    const handleEntries = (entries: FCPMetric['entries']) => {
+      (entries as PerformancePaintTiming[]).forEach((entry) => {
+        if (entry.name === 'first-contentful-paint') {
+          po!.disconnect();
+
+          // Only report if the page wasn't hidden prior to the first paint.
+          if (entry.startTime < visibilityWatcher.firstHiddenTime) {
+            // The activationStart reference is used because FCP should be
+            // relative to page activation rather than navigation start if the
+            // page was prerendered. But in cases where `activationStart` occurs
+            // after the FCP, this time should be clamped at 0.
+            metric.value = Math.max(entry.startTime - getActivationStart(), 0);
+            metric.entries.push(entry);
+            report(true);
+          }
+        }
+      });
+    };
+
+    const po = observe('paint', handleEntries);
+
+    if (po) {
+      report = bindReporter(
+        onReport,
+        metric,
+        FCPThresholds,
+        opts!.reportAllChanges,
+      );
+
+      // Only report after a bfcache restore if the `PerformanceObserver`
+      // successfully registered or the `paint` entry exists.
+      onBFCacheRestore((event) => {
+        metric = initMetric('FCP');
+        report = bindReporter(
+          onReport,
+          metric,
+          FCPThresholds,
+          opts!.reportAllChanges,
+        );
+
+        doubleRAF(() => {
+          metric.value = performance.now() - event.timeStamp;
+          report(true);
+        });
+      });
+    }
+  });
+};

node_modules/web-vitals/src/onFID.ts

@@ -0,0 +1,131 @@
+/*
+ * 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.
+ */
+
+import {onBFCacheRestore} from './lib/bfcache.js';
+import {bindReporter} from './lib/bindReporter.js';
+import {getVisibilityWatcher} from './lib/getVisibilityWatcher.js';
+import {initMetric} from './lib/initMetric.js';
+import {observe} from './lib/observe.js';
+import {onHidden} from './lib/onHidden.js';
+import {
+  firstInputPolyfill,
+  resetFirstInputPolyfill,
+} from './lib/polyfills/firstInputPolyfill.js';
+import {runOnce} from './lib/runOnce.js';
+import {whenActivated} from './lib/whenActivated.js';
+import {
+  FIDMetric,
+  FIDReportCallback,
+  FirstInputPolyfillCallback,
+  MetricRatingThresholds,
+  ReportOpts,
+} from './types.js';
+
+/** Thresholds for FID. See https://web.dev/articles/fid#what_is_a_good_fid_score */
+export const FIDThresholds: MetricRatingThresholds = [100, 300];
+
+/**
+ * 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: FIDReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  whenActivated(() => {
+    const visibilityWatcher = getVisibilityWatcher();
+    let metric = initMetric('FID');
+    let report: ReturnType<typeof bindReporter>;
+
+    const handleEntry = (entry: PerformanceEventTiming) => {
+      // Only report if the page wasn't hidden prior to the first input.
+      if (entry.startTime < visibilityWatcher.firstHiddenTime) {
+        metric.value = entry.processingStart - entry.startTime;
+        metric.entries.push(entry);
+        report(true);
+      }
+    };
+
+    const handleEntries = (entries: FIDMetric['entries']) => {
+      (entries as PerformanceEventTiming[]).forEach(handleEntry);
+    };
+
+    const po = observe('first-input', handleEntries);
+    report = bindReporter(
+      onReport,
+      metric,
+      FIDThresholds,
+      opts!.reportAllChanges,
+    );
+
+    if (po) {
+      onHidden(
+        runOnce(() => {
+          handleEntries(po.takeRecords() as FIDMetric['entries']);
+          po.disconnect();
+        }),
+      );
+    }
+
+    if (window.__WEB_VITALS_POLYFILL__) {
+      console.warn(
+        'The web-vitals "base+polyfill" build is deprecated. See: https://bit.ly/3aqzsGm',
+      );
+
+      // Prefer the native implementation if available,
+      if (!po) {
+        window.webVitals.firstInputPolyfill(
+          handleEntry as FirstInputPolyfillCallback,
+        );
+      }
+      onBFCacheRestore(() => {
+        metric = initMetric('FID');
+        report = bindReporter(
+          onReport,
+          metric,
+          FIDThresholds,
+          opts!.reportAllChanges,
+        );
+
+        window.webVitals.resetFirstInputPolyfill();
+        window.webVitals.firstInputPolyfill(
+          handleEntry as FirstInputPolyfillCallback,
+        );
+      });
+    } else {
+      // Only monitor bfcache restores if the browser supports FID natively.
+      if (po) {
+        onBFCacheRestore(() => {
+          metric = initMetric('FID');
+          report = bindReporter(
+            onReport,
+            metric,
+            FIDThresholds,
+            opts!.reportAllChanges,
+          );
+
+          resetFirstInputPolyfill();
+          firstInputPolyfill(handleEntry as FirstInputPolyfillCallback);
+        });
+      }
+    }
+  });
+};

node_modules/web-vitals/src/onINP.ts

@@ -0,0 +1,261 @@
+/*
+ * 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 {onBFCacheRestore} from './lib/bfcache.js';
+import {bindReporter} from './lib/bindReporter.js';
+import {initMetric} from './lib/initMetric.js';
+import {observe} from './lib/observe.js';
+import {onHidden} from './lib/onHidden.js';
+import {
+  getInteractionCount,
+  initInteractionCountPolyfill,
+} from './lib/polyfills/interactionCountPolyfill.js';
+import {whenActivated} from './lib/whenActivated.js';
+import {
+  INPMetric,
+  INPReportCallback,
+  MetricRatingThresholds,
+  ReportOpts,
+} from './types.js';
+
+interface Interaction {
+  id: number;
+  latency: number;
+  entries: PerformanceEventTiming[];
+}
+
+/** Thresholds for INP. See https://web.dev/articles/inp#what_is_a_good_inp_score */
+export const INPThresholds: MetricRatingThresholds = [200, 500];
+
+// Used to store the interaction count after a bfcache restore, since p98
+// interaction latencies should only consider the current navigation.
+let prevInteractionCount = 0;
+
+/**
+ * Returns the interaction count since the last bfcache restore (or for the
+ * full page lifecycle if there were no bfcache restores).
+ */
+const getInteractionCountForNavigation = () => {
+  return getInteractionCount() - prevInteractionCount;
+};
+
+// To prevent unnecessary memory usage on pages with lots of interactions,
+// store at most 10 of the longest interactions to consider as INP candidates.
+const MAX_INTERACTIONS_TO_CONSIDER = 10;
+
+// A list of longest interactions on the page (by latency) sorted so the
+// longest one is first. The list is as most MAX_INTERACTIONS_TO_CONSIDER long.
+let longestInteractionList: Interaction[] = [];
+
+// A mapping of longest interactions by their interaction ID.
+// This is used for faster lookup.
+const longestInteractionMap: {[interactionId: string]: Interaction} = {};
+
+/**
+ * Takes a performance entry and adds it to the list of worst interactions
+ * if its duration is long enough to make it among the worst. If the
+ * entry is part of an existing interaction, it is merged and the latency
+ * and entries list is updated as needed.
+ */
+const processEntry = (entry: PerformanceEventTiming) => {
+  // The least-long of the 10 longest interactions.
+  const minLongestInteraction =
+    longestInteractionList[longestInteractionList.length - 1];
+
+  const existingInteraction = longestInteractionMap[entry.interactionId!];
+
+  // Only process the entry if it's possibly one of the ten longest,
+  // or if it's part of an existing interaction.
+  if (
+    existingInteraction ||
+    longestInteractionList.length < MAX_INTERACTIONS_TO_CONSIDER ||
+    entry.duration > minLongestInteraction.latency
+  ) {
+    // If the interaction already exists, update it. Otherwise create one.
+    if (existingInteraction) {
+      existingInteraction.entries.push(entry);
+      existingInteraction.latency = Math.max(
+        existingInteraction.latency,
+        entry.duration,
+      );
+    } else {
+      const interaction = {
+        id: entry.interactionId!,
+        latency: entry.duration,
+        entries: [entry],
+      };
+      longestInteractionMap[interaction.id] = interaction;
+      longestInteractionList.push(interaction);
+    }
+
+    // Sort the entries by latency (descending) and keep only the top ten.
+    longestInteractionList.sort((a, b) => b.latency - a.latency);
+    longestInteractionList.splice(MAX_INTERACTIONS_TO_CONSIDER).forEach((i) => {
+      delete longestInteractionMap[i.id];
+    });
+  }
+};
+
+/**
+ * Returns the estimated p98 longest interaction based on the stored
+ * interaction candidates and the interaction count for the current page.
+ */
+const estimateP98LongestInteraction = () => {
+  const candidateInteractionIndex = Math.min(
+    longestInteractionList.length - 1,
+    Math.floor(getInteractionCountForNavigation() / 50),
+  );
+
+  return longestInteractionList[candidateInteractionIndex];
+};
+
+/**
+ * Calculates the [INP](https://web.dev/articles/inp) value for the current
+ * page and calls the `callback` function once the value is ready, along with
+ * the `event` performance entries reported for that interaction. The reported
+ * value is a `DOMHighResTimeStamp`.
+ *
+ * A custom `durationThreshold` configuration option can optionally be passed to
+ * control what `event-timing` entries are considered for INP reporting. The
+ * default threshold is `40`, which means INP scores of less than 40 are
+ * reported as 0. Note that this will not affect your 75th percentile INP value
+ * unless that value is also less than 40 (well below the recommended
+ * [good](https://web.dev/articles/inp#what_is_a_good_inp_score) threshold).
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called as soon as the value is initially
+ * determined as well as any time the value changes throughout the page
+ * lifespan.
+ *
+ * _**Important:** INP should be continually monitored for changes throughout
+ * the entire lifespan of a page—including if the user returns to the page after
+ * it's been hidden/backgrounded. However, since browsers often [will not fire
+ * additional callbacks once the user has backgrounded a
+ * page](https://developer.chrome.com/blog/page-lifecycle-api/#advice-hidden),
+ * `callback` is always called when the page's visibility state changes to
+ * hidden. As a result, the `callback` function might be called multiple times
+ * during the same page load._
+ */
+export const onINP = (onReport: INPReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  whenActivated(() => {
+    // TODO(philipwalton): remove once the polyfill is no longer needed.
+    initInteractionCountPolyfill();
+
+    let metric = initMetric('INP');
+    let report: ReturnType<typeof bindReporter>;
+
+    const handleEntries = (entries: INPMetric['entries']) => {
+      entries.forEach((entry) => {
+        if (entry.interactionId) {
+          processEntry(entry);
+        }
+
+        // Entries of type `first-input` don't currently have an `interactionId`,
+        // so to consider them in INP we have to first check that an existing
+        // entry doesn't match the `duration` and `startTime`.
+        // Note that this logic assumes that `event` entries are dispatched
+        // before `first-input` entries. This is true in Chrome (the only browser
+        // that currently supports INP).
+        // TODO(philipwalton): remove once crbug.com/1325826 is fixed.
+        if (entry.entryType === 'first-input') {
+          const noMatchingEntry = !longestInteractionList.some(
+            (interaction) => {
+              return interaction.entries.some((prevEntry) => {
+                return (
+                  entry.duration === prevEntry.duration &&
+                  entry.startTime === prevEntry.startTime
+                );
+              });
+            },
+          );
+          if (noMatchingEntry) {
+            processEntry(entry);
+          }
+        }
+      });
+
+      const inp = estimateP98LongestInteraction();
+
+      if (inp && inp.latency !== metric.value) {
+        metric.value = inp.latency;
+        metric.entries = inp.entries;
+        report();
+      }
+    };
+
+    const po = observe('event', handleEntries, {
+      // Event Timing entries have their durations rounded to the nearest 8ms,
+      // so a duration of 40ms would be any event that spans 2.5 or more frames
+      // at 60Hz. This threshold is chosen to strike a balance between usefulness
+      // and performance. Running this callback for any interaction that spans
+      // just one or two frames is likely not worth the insight that could be
+      // gained.
+      durationThreshold: opts!.durationThreshold ?? 40,
+    } as PerformanceObserverInit);
+
+    report = bindReporter(
+      onReport,
+      metric,
+      INPThresholds,
+      opts!.reportAllChanges,
+    );
+
+    if (po) {
+      // If browser supports interactionId (and so supports INP), also
+      // observe entries of type `first-input`. This is useful in cases
+      // where the first interaction is less than the `durationThreshold`.
+      if (
+        'PerformanceEventTiming' in window &&
+        'interactionId' in PerformanceEventTiming.prototype
+      ) {
+        po.observe({type: 'first-input', buffered: true});
+      }
+
+      onHidden(() => {
+        handleEntries(po.takeRecords() as INPMetric['entries']);
+
+        // If the interaction count shows that there were interactions but
+        // none were captured by the PerformanceObserver, report a latency of 0.
+        if (metric.value < 0 && getInteractionCountForNavigation() > 0) {
+          metric.value = 0;
+          metric.entries = [];
+        }
+
+        report(true);
+      });
+
+      // Only report after a bfcache restore if the `PerformanceObserver`
+      // successfully registered.
+      onBFCacheRestore(() => {
+        longestInteractionList = [];
+        // Important, we want the count for the full page here,
+        // not just for the current navigation.
+        prevInteractionCount = getInteractionCount();
+
+        metric = initMetric('INP');
+        report = bindReporter(
+          onReport,
+          metric,
+          INPThresholds,
+          opts!.reportAllChanges,
+        );
+      });
+    }
+  });
+};

node_modules/web-vitals/src/onLCP.ts

@@ -0,0 +1,130 @@
+/*
+ * 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.
+ */
+
+import {onBFCacheRestore} from './lib/bfcache.js';
+import {bindReporter} from './lib/bindReporter.js';
+import {doubleRAF} from './lib/doubleRAF.js';
+import {getActivationStart} from './lib/getActivationStart.js';
+import {getVisibilityWatcher} from './lib/getVisibilityWatcher.js';
+import {initMetric} from './lib/initMetric.js';
+import {observe} from './lib/observe.js';
+import {onHidden} from './lib/onHidden.js';
+import {runOnce} from './lib/runOnce.js';
+import {whenActivated} from './lib/whenActivated.js';
+import {
+  LCPMetric,
+  MetricRatingThresholds,
+  LCPReportCallback,
+  ReportOpts,
+} from './types.js';
+
+/** Thresholds for LCP. See https://web.dev/articles/lcp#what_is_a_good_lcp_score */
+export const LCPThresholds: MetricRatingThresholds = [2500, 4000];
+
+const reportedMetricIDs: Record<string, boolean> = {};
+
+/**
+ * Calculates the [LCP](https://web.dev/articles/lcp) value for the current page and
+ * calls the `callback` function once the value is ready (along with the
+ * relevant `largest-contentful-paint` performance entry used to determine the
+ * value). The reported value is a `DOMHighResTimeStamp`.
+ *
+ * If the `reportAllChanges` configuration option is set to `true`, the
+ * `callback` function will be called any time a new `largest-contentful-paint`
+ * performance entry is dispatched, or once the final value of the metric has
+ * been determined.
+ */
+export const onLCP = (onReport: LCPReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  whenActivated(() => {
+    const visibilityWatcher = getVisibilityWatcher();
+    let metric = initMetric('LCP');
+    let report: ReturnType<typeof bindReporter>;
+
+    const handleEntries = (entries: LCPMetric['entries']) => {
+      const lastEntry = entries[entries.length - 1] as LargestContentfulPaint;
+      if (lastEntry) {
+        // Only report if the page wasn't hidden prior to LCP.
+        if (lastEntry.startTime < visibilityWatcher.firstHiddenTime) {
+          // The startTime attribute returns the value of the renderTime if it is
+          // not 0, and the value of the loadTime otherwise. The activationStart
+          // reference is used because LCP should be relative to page activation
+          // rather than navigation start if the page was prerendered. But in cases
+          // where `activationStart` occurs after the LCP, this time should be
+          // clamped at 0.
+          metric.value = Math.max(
+            lastEntry.startTime - getActivationStart(),
+            0,
+          );
+          metric.entries = [lastEntry];
+          report();
+        }
+      }
+    };
+
+    const po = observe('largest-contentful-paint', handleEntries);
+
+    if (po) {
+      report = bindReporter(
+        onReport,
+        metric,
+        LCPThresholds,
+        opts!.reportAllChanges,
+      );
+
+      const stopListening = runOnce(() => {
+        if (!reportedMetricIDs[metric.id]) {
+          handleEntries(po!.takeRecords() as LCPMetric['entries']);
+          po!.disconnect();
+          reportedMetricIDs[metric.id] = true;
+          report(true);
+        }
+      });
+
+      // Stop listening after input. Note: while scrolling is an input that
+      // stops LCP observation, it's unreliable since it can be programmatically
+      // generated. See: https://github.com/GoogleChrome/web-vitals/issues/75
+      ['keydown', 'click'].forEach((type) => {
+        // Wrap in a setTimeout so the callback is run in a separate task
+        // to avoid extending the keyboard/click handler to reduce INP impact
+        // https://github.com/GoogleChrome/web-vitals/issues/383
+        addEventListener(type, () => setTimeout(stopListening, 0), true);
+      });
+
+      onHidden(stopListening);
+
+      // Only report after a bfcache restore if the `PerformanceObserver`
+      // successfully registered.
+      onBFCacheRestore((event) => {
+        metric = initMetric('LCP');
+        report = bindReporter(
+          onReport,
+          metric,
+          LCPThresholds,
+          opts!.reportAllChanges,
+        );
+
+        doubleRAF(() => {
+          metric.value = performance.now() - event.timeStamp;
+          reportedMetricIDs[metric.id] = true;
+          report(true);
+        });
+      });
+    }
+  });
+};

node_modules/web-vitals/src/onTTFB.ts

@@ -0,0 +1,112 @@
+/*
+ * 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.
+ */
+
+import {bindReporter} from './lib/bindReporter.js';
+import {initMetric} from './lib/initMetric.js';
+import {onBFCacheRestore} from './lib/bfcache.js';
+import {getNavigationEntry} from './lib/getNavigationEntry.js';
+import {
+  MetricRatingThresholds,
+  ReportOpts,
+  TTFBReportCallback,
+} from './types.js';
+import {getActivationStart} from './lib/getActivationStart.js';
+import {whenActivated} from './lib/whenActivated.js';
+
+/** Thresholds for TTFB. See https://web.dev/articles/ttfb#what_is_a_good_ttfb_score */
+export const TTFBThresholds: MetricRatingThresholds = [800, 1800];
+
+/**
+ * Runs in the next task after the page is done loading and/or prerendering.
+ * @param callback
+ */
+const whenReady = (callback: () => void) => {
+  if (document.prerendering) {
+    whenActivated(() => whenReady(callback));
+  } else if (document.readyState !== 'complete') {
+    addEventListener('load', () => whenReady(callback), true);
+  } else {
+    // Queue a task so the callback runs after `loadEventEnd`.
+    setTimeout(callback, 0);
+  }
+};
+
+/**
+ * Calculates the [TTFB](https://web.dev/articles/ttfb) value for the
+ * current page and calls the `callback` function once the page has loaded,
+ * along with the relevant `navigation` performance entry used to determine the
+ * value. The reported value is a `DOMHighResTimeStamp`.
+ *
+ * Note, this function waits until after the page is loaded to call `callback`
+ * in order to ensure all properties of the `navigation` entry are populated.
+ * This is useful if you want to report on other metrics exposed by the
+ * [Navigation Timing API](https://w3c.github.io/navigation-timing/). For
+ * example, the TTFB metric starts from the page's [time
+ * origin](https://www.w3.org/TR/hr-time-2/#sec-time-origin), which means it
+ * includes time spent on DNS lookup, connection negotiation, network latency,
+ * and server processing time.
+ */
+export const onTTFB = (onReport: TTFBReportCallback, opts?: ReportOpts) => {
+  // Set defaults
+  opts = opts || {};
+
+  let metric = initMetric('TTFB');
+  let report = bindReporter(
+    onReport,
+    metric,
+    TTFBThresholds,
+    opts.reportAllChanges,
+  );
+
+  whenReady(() => {
+    const navEntry = getNavigationEntry();
+
+    if (navEntry) {
+      const responseStart = navEntry.responseStart;
+
+      // In some cases no value is reported by the browser (for
+      // privacy/security reasons), and in other cases (bugs) the value is
+      // negative or is larger than the current page time. Ignore these cases:
+      // https://github.com/GoogleChrome/web-vitals/issues/137
+      // https://github.com/GoogleChrome/web-vitals/issues/162
+      // https://github.com/GoogleChrome/web-vitals/issues/275
+      if (responseStart <= 0 || responseStart > performance.now()) return;
+
+      // The activationStart reference is used because TTFB should be
+      // relative to page activation rather than navigation start if the
+      // page was prerendered. But in cases where `activationStart` occurs
+      // after the first byte is received, this time should be clamped at 0.
+      metric.value = Math.max(responseStart - getActivationStart(), 0);
+
+      metric.entries = [navEntry];
+      report(true);
+
+      // Only report TTFB after bfcache restores if a `navigation` entry
+      // was reported for the initial load.
+      onBFCacheRestore(() => {
+        metric = initMetric('TTFB', 0);
+        report = bindReporter(
+          onReport,
+          metric,
+          TTFBThresholds,
+          opts!.reportAllChanges,
+        );
+
+        report(true);
+      });
+    }
+  });
+};

node_modules/web-vitals/src/polyfill.ts

@@ -0,0 +1,30 @@
+/*
+ * 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.
+ */
+
+import {
+  firstInputPolyfill,
+  resetFirstInputPolyfill,
+} from './lib/polyfills/firstInputPolyfill.js';
+import {getFirstHiddenTime} from './lib/polyfills/getFirstHiddenTimePolyfill.js';
+
+resetFirstInputPolyfill();
+self.webVitals = {
+  firstInputPolyfill: firstInputPolyfill,
+  resetFirstInputPolyfill: resetFirstInputPolyfill,
+  get firstHiddenTime() {
+    return getFirstHiddenTime();
+  },
+};

node_modules/web-vitals/src/types.ts

@@ -0,0 +1,112 @@
+/*
+ * 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.
+ */
+
+import {FirstInputPolyfillCallback} from './types/polyfills.js';
+
+export * from './types/base.js';
+export * from './types/polyfills.js';
+
+export * from './types/cls.js';
+export * from './types/fcp.js';
+export * from './types/fid.js';
+export * from './types/inp.js';
+export * from './types/lcp.js';
+export * from './types/ttfb.js';
+
+// --------------------------------------------------------------------------
+// Web Vitals package globals
+// --------------------------------------------------------------------------
+
+export interface WebVitalsGlobal {
+  firstInputPolyfill: (onFirstInput: FirstInputPolyfillCallback) => void;
+  resetFirstInputPolyfill: () => void;
+  firstHiddenTime: number;
+}
+
+declare global {
+  interface Window {
+    webVitals: WebVitalsGlobal;
+
+    // Build flags:
+    __WEB_VITALS_POLYFILL__: boolean;
+  }
+}
+
+// --------------------------------------------------------------------------
+// Everything below is modifications to built-in modules.
+// --------------------------------------------------------------------------
+
+interface PerformanceEntryMap {
+  navigation: PerformanceNavigationTiming;
+  resource: PerformanceResourceTiming;
+  paint: PerformancePaintTiming;
+}
+
+// Update built-in types to be more accurate.
+declare global {
+  interface Document {
+    // https://wicg.github.io/nav-speculation/prerendering.html#document-prerendering
+    prerendering?: boolean;
+    // https://wicg.github.io/page-lifecycle/#sec-api
+    wasDiscarded?: boolean;
+  }
+
+  interface Performance {
+    getEntriesByType<K extends keyof PerformanceEntryMap>(
+      type: K,
+    ): PerformanceEntryMap[K][];
+  }
+
+  // https://w3c.github.io/event-timing/#sec-modifications-perf-timeline
+  interface PerformanceObserverInit {
+    durationThreshold?: number;
+  }
+
+  // https://wicg.github.io/nav-speculation/prerendering.html#performance-navigation-timing-extension
+  interface PerformanceNavigationTiming {
+    activationStart?: number;
+  }
+
+  // https://wicg.github.io/event-timing/#sec-performance-event-timing
+  interface PerformanceEventTiming extends PerformanceEntry {
+    duration: DOMHighResTimeStamp;
+    interactionId?: number;
+  }
+
+  // https://wicg.github.io/layout-instability/#sec-layout-shift-attribution
+  interface LayoutShiftAttribution {
+    node?: Node;
+    previousRect: DOMRectReadOnly;
+    currentRect: DOMRectReadOnly;
+  }
+
+  // https://wicg.github.io/layout-instability/#sec-layout-shift
+  interface LayoutShift extends PerformanceEntry {
+    value: number;
+    sources: LayoutShiftAttribution[];
+    hadRecentInput: boolean;
+  }
+
+  // https://w3c.github.io/largest-contentful-paint/#sec-largest-contentful-paint-interface
+  interface LargestContentfulPaint extends PerformanceEntry {
+    renderTime: DOMHighResTimeStamp;
+    loadTime: DOMHighResTimeStamp;
+    size: number;
+    id: string;
+    url: string;
+    element?: Element;
+  }
+}

node_modules/web-vitals/src/types/base.ts

@@ -0,0 +1,158 @@
+/*
+ * 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 {
+  FirstInputPolyfillEntry,
+  NavigationTimingPolyfillEntry,
+} from './polyfills.js';
+import type {CLSMetric} from './cls.js';
+import type {FCPMetric} from './fcp.js';
+import type {FIDMetric} from './fid.js';
+import type {INPMetric} from './inp.js';
+import type {LCPMetric} from './lcp.js';
+import type {TTFBMetric} from './ttfb.js';
+
+export interface Metric {
+  /**
+   * The name of the metric (in acronym form).
+   */
+  name: 'CLS' | 'FCP' | 'FID' | 'INP' | 'LCP' | 'TTFB';
+
+  /**
+   * The current value of the metric.
+   */
+  value: number;
+
+  /**
+   * The rating as to whether the metric value is within the "good",
+   * "needs improvement", or "poor" thresholds of the metric.
+   */
+  rating: 'good' | 'needs-improvement' | 'poor';
+
+  /**
+   * The delta between the current value and the last-reported value.
+   * On the first report, `delta` and `value` will always be the same.
+   */
+  delta: number;
+
+  /**
+   * A unique ID representing this particular metric instance. This ID can
+   * be used by an analytics tool to dedupe multiple values sent for the same
+   * metric instance, or to group multiple deltas together and calculate a
+   * total. It can also be used to differentiate multiple different metric
+   * instances sent from the same page, which can happen if the page is
+   * restored from the back/forward cache (in that case new metrics object
+   * get created).
+   */
+  id: string;
+
+  /**
+   * Any performance entries relevant to the metric value calculation.
+   * The array may also be empty if the metric value was not based on any
+   * entries (e.g. a CLS value of 0 given no layout shifts).
+   */
+  entries: (
+    | PerformanceEntry
+    | LayoutShift
+    | FirstInputPolyfillEntry
+    | NavigationTimingPolyfillEntry
+  )[];
+
+  /**
+   * The type of navigation.
+   *
+   * This will be the value returned by the Navigation Timing API (or
+   * `undefined` if the browser doesn't support that API), with the following
+   * exceptions:
+   * - 'back-forward-cache': for pages that are restored from the bfcache.
+   * - 'prerender': for pages that were prerendered.
+   * - 'restore': for pages that were discarded by the browser and then
+   * restored by the user.
+   */
+  navigationType:
+    | 'navigate'
+    | 'reload'
+    | 'back-forward'
+    | 'back-forward-cache'
+    | 'prerender'
+    | 'restore';
+}
+
+/** The union of supported metric types. */
+export type MetricType =
+  | CLSMetric
+  | FCPMetric
+  | FIDMetric
+  | INPMetric
+  | LCPMetric
+  | TTFBMetric;
+
+/**
+ * A version of the `Metric` that is used with the attribution build.
+ */
+export interface MetricWithAttribution extends Metric {
+  /**
+   * An object containing potentially-helpful debugging information that
+   * can be sent along with the metric value for the current page visit in
+   * order to help identify issues happening to real-users in the field.
+   */
+  attribution: {[key: string]: unknown};
+}
+
+/**
+ * The thresholds of metric's "good", "needs improvement", and "poor" ratings.
+ *
+ * - Metric values up to and including [0] are rated "good"
+ * - Metric values up to and including [1] are rated "needs improvement"
+ * - Metric values above [1] are "poor"
+ *
+ * | Metric value    | Rating              |
+ * | --------------- | ------------------- |
+ * | ≦ [0]           | "good"              |
+ * | > [0] and ≦ [1] | "needs improvement" |
+ * | > [1]           | "poor"              |
+ */
+export type MetricRatingThresholds = [number, number];
+
+export interface ReportCallback {
+  (metric: MetricType): void;
+}
+
+export interface ReportOpts {
+  reportAllChanges?: boolean;
+  durationThreshold?: number;
+}
+
+/**
+ * The loading state of the document. Note: this value is similar to
+ * `document.readyState` but it subdivides the "interactive" state into the
+ * time before and after the DOMContentLoaded event fires.
+ *
+ * State descriptions:
+ * - `loading`: the initial document response has not yet been fully downloaded
+ *   and parsed. This is equivalent to the corresponding `readyState` value.
+ * - `dom-interactive`: the document has been fully loaded and parsed, but
+ *   scripts may not have yet finished loading and executing.
+ * - `dom-content-loaded`: the document is fully loaded and parsed, and all
+ *   scripts (except `async` scripts) have loaded and finished executing.
+ * - `complete`: the document and all of its sub-resources have finished
+ *   loading. This is equivalent to the corresponding `readyState` value.
+ */
+export type LoadState =
+  | 'loading'
+  | 'dom-interactive'
+  | 'dom-content-loaded'
+  | 'complete';

node_modules/web-vitals/src/types/cls.ts

@@ -0,0 +1,88 @@
+/*
+ * 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 type {LoadState, Metric} from './base.js';
+
+/**
+ * A CLS-specific version of the Metric object.
+ */
+export interface CLSMetric extends Metric {
+  name: 'CLS';
+  entries: LayoutShift[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the CLS value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface CLSAttribution {
+  /**
+   * A selector identifying the first element (in document order) that
+   * shifted when the single largest layout shift contributing to the page's
+   * CLS score occurred.
+   */
+  largestShiftTarget?: string;
+  /**
+   * The time when the single largest layout shift contributing to the page's
+   * CLS score occurred.
+   */
+  largestShiftTime?: DOMHighResTimeStamp;
+  /**
+   * The layout shift score of the single largest layout shift contributing to
+   * the page's CLS score.
+   */
+  largestShiftValue?: number;
+  /**
+   * The `LayoutShiftEntry` representing the single largest layout shift
+   * contributing to the page's CLS score. (Useful when you need more than just
+   * `largestShiftTarget`, `largestShiftTime`, and `largestShiftValue`).
+   */
+  largestShiftEntry?: LayoutShift;
+  /**
+   * The first element source (in document order) among the `sources` list
+   * of the `largestShiftEntry` object. (Also useful when you need more than
+   * just `largestShiftTarget`, `largestShiftTime`, and `largestShiftValue`).
+   */
+  largestShiftSource?: LayoutShiftAttribution;
+  /**
+   * The loading state of the document at the time when the largest layout
+   * shift contribution to the page's CLS score occurred (see `LoadState`
+   * for details).
+   */
+  loadState?: LoadState;
+}
+
+/**
+ * A CLS-specific version of the Metric object with attribution.
+ */
+export interface CLSMetricWithAttribution extends CLSMetric {
+  attribution: CLSAttribution;
+}
+
+/**
+ * A CLS-specific version of the ReportCallback function.
+ */
+export interface CLSReportCallback {
+  (metric: CLSMetric): void;
+}
+
+/**
+ * A CLS-specific version of the ReportCallback function with attribution.
+ */
+export interface CLSReportCallbackWithAttribution {
+  (metric: CLSMetricWithAttribution): void;
+}

node_modules/web-vitals/src/types/fcp.ts

@@ -0,0 +1,80 @@
+/*
+ * 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 type {LoadState, Metric} from './base.js';
+import {NavigationTimingPolyfillEntry} from './polyfills.js';
+
+/**
+ * An FCP-specific version of the Metric object.
+ */
+export interface FCPMetric extends Metric {
+  name: 'FCP';
+  entries: PerformancePaintTiming[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the FCP value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface FCPAttribution {
+  /**
+   * The time from when the user initiates loading the page until when the
+   * browser receives the first byte of the response (a.k.a. TTFB).
+   */
+  timeToFirstByte: number;
+  /**
+   * The delta between TTFB and the first contentful paint (FCP).
+   */
+  firstByteToFCP: number;
+  /**
+   * The loading state of the document at the time when FCP `occurred (see
+   * `LoadState` for details). Ideally, documents can paint before they finish
+   * loading (e.g. the `loading` or `dom-interactive` phases).
+   */
+  loadState: LoadState;
+  /**
+   * The `PerformancePaintTiming` entry corresponding to FCP.
+   */
+  fcpEntry?: PerformancePaintTiming;
+  /**
+   * The `navigation` entry of the current page, which is useful for diagnosing
+   * general page load issues. This can be used to access `serverTiming` for example:
+   * navigationEntry?.serverTiming
+   */
+  navigationEntry?: PerformanceNavigationTiming | NavigationTimingPolyfillEntry;
+}
+
+/**
+ * An FCP-specific version of the Metric object with attribution.
+ */
+export interface FCPMetricWithAttribution extends FCPMetric {
+  attribution: FCPAttribution;
+}
+
+/**
+ * An FCP-specific version of the ReportCallback function.
+ */
+export interface FCPReportCallback {
+  (metric: FCPMetric): void;
+}
+
+/**
+ * An FCP-specific version of the ReportCallback function with attribution.
+ */
+export interface FCPReportCallbackWithAttribution {
+  (metric: FCPMetricWithAttribution): void;
+}

node_modules/web-vitals/src/types/fid.ts

@@ -0,0 +1,81 @@
+/*
+ * 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 type {LoadState, Metric} from './base.js';
+import {FirstInputPolyfillEntry} from './polyfills.js';
+
+/**
+ * An FID-specific version of the Metric object.
+ */
+export interface FIDMetric extends Metric {
+  name: 'FID';
+  entries: (PerformanceEventTiming | FirstInputPolyfillEntry)[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the FID value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface FIDAttribution {
+  /**
+   * A selector identifying the element that the user interacted with. This
+   * element will be the `target` of the `event` dispatched.
+   */
+  eventTarget: string;
+  /**
+   * The time when the user interacted. This time will match the `timeStamp`
+   * value of the `event` dispatched.
+   */
+  eventTime: number;
+  /**
+   * The `type` of the `event` dispatched from the user interaction.
+   */
+  eventType: string;
+  /**
+   * The `PerformanceEventTiming` entry corresponding to FID (or the
+   * polyfill entry in browsers that don't support Event Timing).
+   */
+  eventEntry: PerformanceEventTiming | FirstInputPolyfillEntry;
+  /**
+   * The loading state of the document at the time when the first interaction
+   * occurred (see `LoadState` for details). If the first interaction occurred
+   * while the document was loading and executing script (e.g. usually in the
+   * `dom-interactive` phase) it can result in long input delays.
+   */
+  loadState: LoadState;
+}
+
+/**
+ * An FID-specific version of the Metric object with attribution.
+ */
+export interface FIDMetricWithAttribution extends FIDMetric {
+  attribution: FIDAttribution;
+}
+
+/**
+ * An FID-specific version of the ReportCallback function.
+ */
+export interface FIDReportCallback {
+  (metric: FIDMetric): void;
+}
+
+/**
+ * An FID-specific version of the ReportCallback function with attribution.
+ */
+export interface FIDReportCallbackWithAttribution {
+  (metric: FIDMetricWithAttribution): void;
+}

node_modules/web-vitals/src/types/inp.ts

@@ -0,0 +1,80 @@
+/*
+ * 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 type {LoadState, Metric} from './base.js';
+
+/**
+ * An INP-specific version of the Metric object.
+ */
+export interface INPMetric extends Metric {
+  name: 'INP';
+  entries: PerformanceEventTiming[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the INP value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface INPAttribution {
+  /**
+   * A selector identifying the element that the user interacted with for
+   * the event corresponding to INP. This element will be the `target` of the
+   * `event` dispatched.
+   */
+  eventTarget?: string;
+  /**
+   * The time when the user interacted for the event corresponding to INP.
+   * This time will match the `timeStamp` value of the `event` dispatched.
+   */
+  eventTime?: number;
+  /**
+   * The `type` of the `event` dispatched corresponding to INP.
+   */
+  eventType?: string;
+  /**
+   * The `PerformanceEventTiming` entry corresponding to INP.
+   */
+  eventEntry?: PerformanceEventTiming;
+  /**
+   * The loading state of the document at the time when the event corresponding
+   * to INP occurred (see `LoadState` for details). If the interaction occurred
+   * while the document was loading and executing script (e.g. usually in the
+   * `dom-interactive` phase) it can result in long delays.
+   */
+  loadState?: LoadState;
+}
+
+/**
+ * An INP-specific version of the Metric object with attribution.
+ */
+export interface INPMetricWithAttribution extends INPMetric {
+  attribution: INPAttribution;
+}
+
+/**
+ * An INP-specific version of the ReportCallback function.
+ */
+export interface INPReportCallback {
+  (metric: INPMetric): void;
+}
+
+/**
+ * An INP-specific version of the ReportCallback function with attribution.
+ */
+export interface INPReportCallbackWithAttribution {
+  (metric: INPMetricWithAttribution): void;
+}

node_modules/web-vitals/src/types/lcp.ts

@@ -0,0 +1,103 @@
+/*
+ * 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 type {Metric} from './base.js';
+import {NavigationTimingPolyfillEntry} from './polyfills.js';
+
+/**
+ * An LCP-specific version of the Metric object.
+ */
+export interface LCPMetric extends Metric {
+  name: 'LCP';
+  entries: LargestContentfulPaint[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the LCP value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface LCPAttribution {
+  /**
+   * The element corresponding to the largest contentful paint for the page.
+   */
+  element?: string;
+  /**
+   * The URL (if applicable) of the LCP image resource. If the LCP element
+   * is a text node, this value will not be set.
+   */
+  url?: string;
+  /**
+   * The time from when the user initiates loading the page until when the
+   * browser receives the first byte of the response (a.k.a. TTFB). See
+   * [Optimize LCP](https://web.dev/articles/optimize-lcp) for details.
+   */
+  timeToFirstByte: number;
+  /**
+   * The delta between TTFB and when the browser starts loading the LCP
+   * resource (if there is one, otherwise 0). See [Optimize
+   * LCP](https://web.dev/articles/optimize-lcp) for details.
+   */
+  resourceLoadDelay: number;
+  /**
+   * The total time it takes to load the LCP resource itself (if there is one,
+   * otherwise 0). See [Optimize LCP](https://web.dev/articles/optimize-lcp) for
+   * details.
+   */
+  resourceLoadTime: number;
+  /**
+   * The delta between when the LCP resource finishes loading until the LCP
+   * element is fully rendered. See [Optimize
+   * LCP](https://web.dev/articles/optimize-lcp) for details.
+   */
+  elementRenderDelay: number;
+  /**
+   * The `navigation` entry of the current page, which is useful for diagnosing
+   * general page load issues. This can be used to access `serverTiming` for example:
+   * navigationEntry?.serverTiming
+   */
+  navigationEntry?: PerformanceNavigationTiming | NavigationTimingPolyfillEntry;
+  /**
+   * The `resource` entry for the LCP resource (if applicable), which is useful
+   * for diagnosing resource load issues.
+   */
+  lcpResourceEntry?: PerformanceResourceTiming;
+  /**
+   * The `LargestContentfulPaint` entry corresponding to LCP.
+   */
+  lcpEntry?: LargestContentfulPaint;
+}
+
+/**
+ * An LCP-specific version of the Metric object with attribution.
+ */
+export interface LCPMetricWithAttribution extends LCPMetric {
+  attribution: LCPAttribution;
+}
+
+/**
+ * An LCP-specific version of the ReportCallback function.
+ */
+export interface LCPReportCallback {
+  (metric: LCPMetric): void;
+}
+
+/**
+ * An LCP-specific version of the ReportCallback function with attribution.
+ */
+export interface LCPReportCallbackWithAttribution {
+  (metric: LCPMetricWithAttribution): void;
+}

node_modules/web-vitals/src/types/polyfills.ts

@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+export type FirstInputPolyfillEntry = Omit<
+  PerformanceEventTiming,
+  'processingEnd'
+>;
+
+export interface FirstInputPolyfillCallback {
+  (entry: FirstInputPolyfillEntry): void;
+}
+
+export type NavigationTimingPolyfillEntry = Omit<
+  PerformanceNavigationTiming,
+  | 'initiatorType'
+  | 'nextHopProtocol'
+  | 'redirectCount'
+  | 'transferSize'
+  | 'encodedBodySize'
+  | 'decodedBodySize'
+  | 'type'
+> & {
+  type: PerformanceNavigationTiming['type'];
+};

node_modules/web-vitals/src/types/ttfb.ts

@@ -0,0 +1,81 @@
+/*
+ * 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 type {Metric} from './base.js';
+import {NavigationTimingPolyfillEntry} from './polyfills.js';
+
+/**
+ * A TTFB-specific version of the Metric object.
+ */
+export interface TTFBMetric extends Metric {
+  name: 'TTFB';
+  entries: PerformanceNavigationTiming[] | NavigationTimingPolyfillEntry[];
+}
+
+/**
+ * An object containing potentially-helpful debugging information that
+ * can be sent along with the TTFB value for the current page visit in order
+ * to help identify issues happening to real-users in the field.
+ */
+export interface TTFBAttribution {
+  /**
+   * The total time from when the user initiates loading the page to when the
+   * DNS lookup begins. This includes redirects, service worker startup, and
+   * HTTP cache lookup times.
+   */
+  waitingTime: number;
+  /**
+   * The total time to resolve the DNS for the current request.
+   */
+  dnsTime: number;
+  /**
+   * The total time to create the connection to the requested domain.
+   */
+  connectionTime: number;
+  /**
+   * The time time from when the request was sent until the first byte of the
+   * response was received. This includes network time as well as server
+   * processing time.
+   */
+  requestTime: number;
+  /**
+   * The `navigation` entry of the current page, which is useful for diagnosing
+   * general page load issues. This can be used to access `serverTiming` for example:
+   * navigationEntry?.serverTiming
+   */
+  navigationEntry?: PerformanceNavigationTiming | NavigationTimingPolyfillEntry;
+}
+
+/**
+ * A TTFB-specific version of the Metric object with attribution.
+ */
+export interface TTFBMetricWithAttribution extends TTFBMetric {
+  attribution: TTFBAttribution;
+}
+
+/**
+ * A TTFB-specific version of the ReportCallback function.
+ */
+export interface TTFBReportCallback {
+  (metric: TTFBMetric): void;
+}
+
+/**
+ * A TTFB-specific version of the ReportCallback function with attribution.
+ */
+export interface TTFBReportCallbackWithAttribution {
+  (metric: TTFBMetricWithAttribution): void;
+}