run lighthouse headlessly

background-lh.js

'use strict';

import fs from 'fs';
import puppeteer from 'puppeteer';

import {navigation} from 'lighthouse/lighthouse-core/fraggle-rock/api.js';

// Run Lighthouse headlessly, just Performance
(async function() {
  const browser = await puppeteer.launch({headless: true});
  const page = await browser.newPage();
  const configContext = {settingsOverrides: {onlyCategories: ['performance'], output: 'html'}};
  const {lhr, artifacts, report} = await navigation({url: 'http://localhost:8080', page, configContext});

  await browser.close();
  fs.writeFileSync('bg-lh.report.html', report);
  console.log({lhr, artifacts});
})();