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authoraltaf-creator <dev@altafcreator.com>2025-11-16 19:08:29 +0800
committeraltaf-creator <dev@altafcreator.com>2025-11-16 19:08:29 +0800
commit434aa8343fdcbb4d5002f934979913c099489bee (patch)
tree55bab4ec5a6151be57797d34f61faf5ea744471b /frontend-old/node_modules/web-vitals/src/onFID.ts
parent893c388d4e99442a36005e5971a87730623f946e (diff)
sdk, del
Diffstat (limited to 'frontend-old/node_modules/web-vitals/src/onFID.ts')
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diff --git a/frontend-old/node_modules/web-vitals/src/onFID.ts b/frontend-old/node_modules/web-vitals/src/onFID.ts
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--- a/frontend-old/node_modules/web-vitals/src/onFID.ts
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-/*
- * 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,
- 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: (metric: FIDMetric) => void,
- 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.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();
- }),
- );
-
- onBFCacheRestore(() => {
- metric = initMetric('FID');
- report = bindReporter(
- onReport,
- metric,
- FIDThresholds,
- opts!.reportAllChanges,
- );
-
- // Browsers don't re-emit FID on bfcache restore so fake it until you make it
- resetFirstInputPolyfill();
- firstInputPolyfill(handleEntry as FirstInputPolyfillCallback);
- });
- }
- });
-};