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>
74 lines
2.2 KiB
Text
74 lines
2.2 KiB
Text
/**
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* @license
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* Copyright 2017 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import BaseGatherer from '../base-gatherer.js';
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/**
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* @fileoverview Tracks unused JavaScript
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*/
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class JsUsage extends BaseGatherer {
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/** @type {LH.Gatherer.GathererMeta} */
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meta = {
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supportedModes: ['snapshot', 'timespan', 'navigation'],
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};
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constructor() {
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super();
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/** @type {LH.Crdp.Profiler.ScriptCoverage[]} */
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this._scriptUsages = [];
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}
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/**
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* @param {LH.Gatherer.Context} context
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*/
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async startInstrumentation(context) {
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const session = context.driver.defaultSession;
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await session.sendCommand('Profiler.enable');
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await session.sendCommand('Profiler.startPreciseCoverage', {detailed: false});
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}
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/**
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* @param {LH.Gatherer.Context} context
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*/
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async stopInstrumentation(context) {
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const session = context.driver.defaultSession;
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const coverageResponse = await session.sendCommand('Profiler.takePreciseCoverage');
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this._scriptUsages = coverageResponse.result;
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await session.sendCommand('Profiler.stopPreciseCoverage');
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await session.sendCommand('Profiler.disable');
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}
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/**
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* @return {Promise<LH.Artifacts['JsUsage']>}
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*/
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async getArtifact() {
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/** @type {Record<string, LH.Crdp.Profiler.ScriptCoverage>} */
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const usageByScriptId = {};
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for (const scriptUsage of this._scriptUsages) {
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// If `url` is blank, that means the script was dynamically
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// created (eval, new Function, onload, ...)
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if (scriptUsage.url === '' || scriptUsage.url === '_lighthouse-eval.js') {
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// We currently don't consider coverage of dynamic scripts, and we definitely don't want
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// coverage of code Lighthouse ran to inspect the page, so we ignore this ScriptCoverage.
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// Audits would work the same without this, it is only an optimization (not tracking coverage
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// for scripts we don't care about).
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continue;
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}
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// Scripts run via puppeteer's evaluate interface will have this url.
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if (scriptUsage.url === '__puppeteer_evaluation_script__') {
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continue;
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}
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usageByScriptId[scriptUsage.scriptId] = scriptUsage;
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}
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return usageByScriptId;
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}
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}
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export default JsUsage;
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