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Name	Size	Last Modified
[D]lib/	-	2022-10-08 17:28:27
[F]getCLS.d.ts	148 bytes	2022-10-08 17:28:26
[F]getCLS.js Edit	3.17 KB	2022-10-08 17:28:23
[F]getFCP.d.ts	148 bytes	2022-10-08 17:28:26
[F]getFCP.js Edit	2.61 KB	2022-10-08 17:28:23
[F]getFID.d.ts	148 bytes	2022-10-08 17:28:27
[F]getFID.js Edit	2.57 KB	2022-10-08 17:28:23
[F]getLCP.d.ts	148 bytes	2022-10-08 17:28:27
[F]getLCP.js Edit	2.88 KB	2022-10-08 17:28:23
[F]getTTFB.d.ts	109 bytes	2022-10-08 17:28:27
[F]getTTFB.js Edit	2.37 KB	2022-10-08 17:28:24
[F]index.d.ts	220 bytes	2022-10-08 17:28:27
[F]index.js Edit	815 bytes	2022-10-08 17:28:24
[F]polyfill.d.ts	11 bytes	2022-10-08 17:28:27
[F]polyfill.js Edit	999 bytes	2022-10-08 17:28:24
[F]types.d.ts	1.21 KB	2022-10-08 17:28:28
[F]types.js Edit	606 bytes	2022-10-08 17:28:25

Editing: getFID.js

/*
 * 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 { getVisibilityWatcher } from './lib/getVisibilityWatcher.js';
import { initMetric } from './lib/initMetric.js';
import { observe } from './lib/observe.js';
import { onBFCacheRestore } from './lib/onBFCacheRestore.js';
import { onHidden } from './lib/onHidden.js';
import { firstInputPolyfill, resetFirstInputPolyfill } from './lib/polyfills/firstInputPolyfill.js';
export const getFID = (onReport, reportAllChanges) => {
    const visibilityWatcher = getVisibilityWatcher();
    let metric = initMetric('FID');
    let report;
    const entryHandler = (entry) => {
        // 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 po = observe('first-input', entryHandler);
    report = bindReporter(onReport, metric, reportAllChanges);
    if (po) {
        onHidden(() => {
            po.takeRecords().map(entryHandler);
            po.disconnect();
        }, true);
    }
    if (window.__WEB_VITALS_POLYFILL__) {
        // Prefer the native implementation if available,
        if (!po) {
            window.webVitals.firstInputPolyfill(entryHandler);
        }
        onBFCacheRestore(() => {
            metric = initMetric('FID');
            report = bindReporter(onReport, metric, reportAllChanges);
            window.webVitals.resetFirstInputPolyfill();
            window.webVitals.firstInputPolyfill(entryHandler);
        });
    }
    else {
        // Only monitor bfcache restores if the browser supports FID natively.
        if (po) {
            onBFCacheRestore(() => {
                metric = initMetric('FID');
                report = bindReporter(onReport, metric, reportAllChanges);
                resetFirstInputPolyfill();
                firstInputPolyfill(entryHandler);
            });
        }
    }
};

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