added orai

24_12_09/node_modules/web-vitals/dist/modules/onINP.js

@@ -0,0 +1,111 @@
+/*
+ * 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 { DEFAULT_DURATION_THRESHOLD, processInteractionEntry, estimateP98LongestInteraction, resetInteractions, } from './lib/interactions.js';
+import { observe } from './lib/observe.js';
+import { onHidden } from './lib/onHidden.js';
+import { initInteractionCountPolyfill } from './lib/polyfills/interactionCountPolyfill.js';
+import { whenActivated } from './lib/whenActivated.js';
+import { whenIdle } from './lib/whenIdle.js';
+/** Thresholds for INP. See https://web.dev/articles/inp#what_is_a_good_inp_score */
+export const INPThresholds = [200, 500];
+/**
+ * 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, opts) => {
+    // Return if the browser doesn't support all APIs needed to measure INP.
+    if (!('PerformanceEventTiming' in self &&
+        'interactionId' in PerformanceEventTiming.prototype)) {
+        return;
+    }
+    // Set defaults
+    opts = opts || {};
+    whenActivated(() => {
+        // TODO(philipwalton): remove once the polyfill is no longer needed.
+        initInteractionCountPolyfill();
+        let metric = initMetric('INP');
+        let report;
+        const handleEntries = (entries) => {
+            // Queue the `handleEntries()` callback in the next idle task.
+            // This is needed to increase the chances that all event entries that
+            // occurred between the user interaction and the next paint
+            // have been dispatched. Note: there is currently an experiment
+            // running in Chrome (EventTimingKeypressAndCompositionInteractionId)
+            // 123+ that if rolled out fully may make this no longer necessary.
+            whenIdle(() => {
+                entries.forEach(processInteractionEntry);
+                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 ?? DEFAULT_DURATION_THRESHOLD,
+        });
+        report = bindReporter(onReport, metric, INPThresholds, opts.reportAllChanges);
+        if (po) {
+            // Also observe entries of type `first-input`. This is useful in cases
+            // where the first interaction is less than the `durationThreshold`.
+            po.observe({ type: 'first-input', buffered: true });
+            onHidden(() => {
+                handleEntries(po.takeRecords());
+                report(true);
+            });
+            // Only report after a bfcache restore if the `PerformanceObserver`
+            // successfully registered.
+            onBFCacheRestore(() => {
+                resetInteractions();
+                metric = initMetric('INP');
+                report = bindReporter(onReport, metric, INPThresholds, opts.reportAllChanges);
+            });
+        }
+    });
+};