DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
52 lines
1.9 KiB
Text
52 lines
1.9 KiB
Text
/**
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* @license
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* Copyright 2019 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Computed Largest Contentful Paint (LCP), the paint time of the largest in-viewport contentful element
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* COMPAT: LCP's trace event was first introduced in m78. We can't surface an LCP for older Chrome versions
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* @see https://github.com/WICG/largest-contentful-paint
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* @see https://wicg.github.io/largest-contentful-paint/
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* @see https://web.dev/lcp
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*/
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import {makeComputedArtifact} from '../computed-artifact.js';
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import {NavigationMetric} from './navigation-metric.js';
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import {LighthouseError} from '../../lib/lh-error.js';
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import {LanternLargestContentfulPaint} from './lantern-largest-contentful-paint.js';
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class LargestContentfulPaint extends NavigationMetric {
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/**
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* @param {LH.Artifacts.NavigationMetricComputationData} data
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* @param {LH.Artifacts.ComputedContext} context
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* @return {Promise<LH.Artifacts.LanternMetric>}
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*/
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static computeSimulatedMetric(data, context) {
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const metricData = NavigationMetric.getMetricComputationInput(data);
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return LanternLargestContentfulPaint.request(metricData, context);
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}
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/**
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* @param {LH.Artifacts.NavigationMetricComputationData} data
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* @return {Promise<LH.Artifacts.Metric>}
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*/
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static async computeObservedMetric(data) {
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const {processedNavigation} = data;
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if (processedNavigation.timings.largestContentfulPaint === undefined) {
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throw new LighthouseError(LighthouseError.errors.NO_LCP);
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}
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return {
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timing: processedNavigation.timings.largestContentfulPaint,
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timestamp: processedNavigation.timestamps.largestContentfulPaint,
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};
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}
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}
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const LargestContentfulPaintComputed = makeComputedArtifact(
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LargestContentfulPaint,
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['devtoolsLog', 'gatherContext', 'settings', 'simulator', 'trace', 'URL', 'SourceMaps']
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);
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export {LargestContentfulPaintComputed as LargestContentfulPaint};
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