@codechecks/lighthouse-keeper/lib/lighthouse/lighthouse.js

Keep an eye on Google Lighthouse score changes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const chromeLauncher = require("chrome-launcher");
const lighthouse = require("lighthouse");
const ReportGenerator = require("lighthouse/lighthouse-core/report/report-generator");
async function runLighthouseAndGetReport(url) {
    const lighthouseResult = await launchChromeAndRunLighthouse(url);
    const htmlReport = createHtmlReport(lighthouseResult.lhr);
    const jsonReport = createJsonReport(lighthouseResult.lhr);
    const categoryReport = createCategoryReport(lighthouseResult.lhr);
    return { metrics: categoryReport, htmlReport, audits: Object.values(jsonReport.audits) };
}
exports.runLighthouseAndGetReport = runLighthouseAndGetReport;
const launchChromeAndRunLighthouse = async (url) => {
    const chrome = await chromeLauncher.launch({
        chromeFlags: ["--disable-gpu", "--headless", "--no-zygote", "--no-sandbox"],
    });
    const flags = {
        port: chrome.port,
        output: "json",
    };
    const result = await lighthouse(url, flags);
    await chrome.kill();
    return result;
};
function createHtmlReport(results) {
    return ReportGenerator.generateReportHtml(results);
}
function createJsonReport(results) {
    return JSON.parse(ReportGenerator.generateReport(results, "json"));
}
function createCategoryReport(results) {
    const { categories } = results;
    return Object.keys(categories).reduce((categoryReport, categoryName) => {
        const category = results.categories[categoryName];
        categoryReport[category.id] = Math.round(category.score * 100);
        return categoryReport;
    }, {});
}
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